//
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// CYLTabBarController.m
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// CYLTabBarController
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//
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// v1.16.0 Created by 微博@iOS程序犭袁 ( http://weibo.com/luohanchenyilong/ ) on 10/20/15.
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// Copyright © 2015 https://github.com/ChenYilong . All rights reserved.
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//
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#import "CYLTabBarController.h"
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#import "CYLTabBar.h"
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#import <objc/runtime.h>
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#import "UIViewController+CYLTabBarControllerExtention.h"
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NSString *const CYLTabBarItemTitle = @"CYLTabBarItemTitle";
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NSString *const CYLTabBarItemImage = @"CYLTabBarItemImage";
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NSString *const CYLTabBarItemSelectedImage = @"CYLTabBarItemSelectedImage";
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NSString *const CYLTabBarItemImageInsets = @"CYLTabBarItemImageInsets";
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NSString *const CYLTabBarItemTitlePositionAdjustment = @"CYLTabBarItemTitlePositionAdjustment";
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NSUInteger CYLTabbarItemsCount = 0;
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NSUInteger CYLPlusButtonIndex = 0;
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CGFloat CYLTabBarItemWidth = 0.0f;
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NSString *const CYLTabBarItemWidthDidChangeNotification = @"CYLTabBarItemWidthDidChangeNotification";
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static void * const CYLTabImageViewDefaultOffsetContext = (void*)&CYLTabImageViewDefaultOffsetContext;
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@interface CYLTabBarController () <UITabBarControllerDelegate>
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@property (nonatomic, assign, getter=isObservingTabImageViewDefaultOffset) BOOL observingTabImageViewDefaultOffset;
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@end
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@implementation CYLTabBarController
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@synthesize viewControllers = _viewControllers;
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#pragma mark -
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#pragma mark - Life Cycle
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- (void)viewDidLoad {
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[super viewDidLoad];
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if (CYL_IS_IPHONE_X) {
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self.tabBarHeight = 83;
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}
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// 处理tabBar，使用自定义 tabBar 添加 发布按钮
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[self setUpTabBar];
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// KVO注册监听
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if (!self.isObservingTabImageViewDefaultOffset) {
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[self.tabBar addObserver:self forKeyPath:@"tabImageViewDefaultOffset" options:NSKeyValueObservingOptionNew context:CYLTabImageViewDefaultOffsetContext];
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self.observingTabImageViewDefaultOffset = YES;
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}
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}
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- (void)setViewDidLayoutSubViewsBlock:(CYLViewDidLayoutSubViewsBlock)viewDidLayoutSubviewsBlock {
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_viewDidLayoutSubviewsBlock = viewDidLayoutSubviewsBlock;
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}
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- (void)viewDidLayoutSubviews {
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CGFloat deviceVersion = [[[UIDevice currentDevice] systemVersion] floatValue];
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if (deviceVersion >= 10 && deviceVersion < 10.2) {
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[self.tabBar layoutSubviews];//Fix issue #93
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}
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UITabBar *tabBar = self.tabBar;
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for (UIControl *control in tabBar.subviews) {
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if ([control isKindOfClass:[UIControl class]]) {
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SEL actin = @selector(didSelectControl:);
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[control addTarget:self action:actin forControlEvents:UIControlEventTouchUpInside];
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}
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}
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!self.viewDidLayoutSubviewsBlock ?: self.viewDidLayoutSubviewsBlock(self);
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}
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- (void)viewWillLayoutSubviews {
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if (!(self.tabBarHeight > 0)) {
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return;
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}
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self.tabBar.frame = ({
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CGRect frame = self.tabBar.frame;
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CGFloat tabBarHeight = self.tabBarHeight;
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frame.size.height = tabBarHeight;
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frame.origin.y = self.view.frame.size.height - tabBarHeight;
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frame;
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});
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}
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- (UIInterfaceOrientationMask)supportedInterfaceOrientations {
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UIViewController *controller = self.selectedViewController;
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if ([controller isKindOfClass:[UINavigationController class]]) {
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UINavigationController *navigationController = (UINavigationController *)controller;
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return navigationController.topViewController.supportedInterfaceOrientations;
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} else {
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return controller.supportedInterfaceOrientations;
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}
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}
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- (void)dealloc {
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UIButton<CYLPlusButtonSubclassing> *plusButton = CYLExternPlusButton;
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if (plusButton.superview && (plusButton.superview == self.tabBar)) {
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plusButton.selected = NO;
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[plusButton removeFromSuperview];
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}
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BOOL isAdded = [self isPlusViewControllerAdded:_viewControllers];
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BOOL hasPlusChildViewController = [self hasPlusChildViewController] && isAdded;
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if (isAdded && hasPlusChildViewController && CYLPlusChildViewController.cyl_plusViewControllerEverAdded == YES) {
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[CYLPlusChildViewController cyl_setPlusViewControllerEverAdded:NO];
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}
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// KVO反注册
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if (self.isObservingTabImageViewDefaultOffset) {
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[self.tabBar removeObserver:self forKeyPath:@"tabImageViewDefaultOffset"];
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}
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}
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#pragma mark -
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#pragma mark - public Methods
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- (instancetype)initWithViewControllers:(NSArray<UIViewController *> *)viewControllers tabBarItemsAttributes:(NSArray<NSDictionary *> *)tabBarItemsAttributes {
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return [self initWithViewControllers:viewControllers
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tabBarItemsAttributes:tabBarItemsAttributes
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imageInsets:UIEdgeInsetsZero
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titlePositionAdjustment:UIOffsetZero
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context:nil];
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}
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- (instancetype)initWithViewControllers:(NSArray<UIViewController *> *)viewControllers
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tabBarItemsAttributes:(NSArray<NSDictionary *> *)tabBarItemsAttributes
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imageInsets:(UIEdgeInsets)imageInsets
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titlePositionAdjustment:(UIOffset)titlePositionAdjustment {
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return [self initWithViewControllers:viewControllers
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tabBarItemsAttributes:tabBarItemsAttributes
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imageInsets:imageInsets
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titlePositionAdjustment:titlePositionAdjustment
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context:nil];
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}
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- (instancetype)initWithViewControllers:(NSArray<UIViewController *> *)viewControllers
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tabBarItemsAttributes:(NSArray<NSDictionary *> *)tabBarItemsAttributes
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imageInsets:(UIEdgeInsets)imageInsets
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titlePositionAdjustment:(UIOffset)titlePositionAdjustment
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context:(NSString *)context {
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if (self = [super init]) {
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_imageInsets = imageInsets;
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_titlePositionAdjustment = titlePositionAdjustment;
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_tabBarItemsAttributes = tabBarItemsAttributes;
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self.context = context;
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self.viewControllers = viewControllers;
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if ([self hasPlusChildViewController]) {
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self.delegate = self;
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}
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}
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return self;
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}
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- (void)setContext:(NSString *)context {
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if (context && context.length > 0) {
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_context = [context copy];
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} else {
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_context = NSStringFromClass([CYLTabBarController class]);
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}
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[self.tabBar setValue:_context forKey:@"context"];
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}
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+ (instancetype)tabBarControllerWithViewControllers:(NSArray<UIViewController *> *)viewControllers
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tabBarItemsAttributes:(NSArray<NSDictionary *> *)tabBarItemsAttributes
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imageInsets:(UIEdgeInsets)imageInsets
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titlePositionAdjustment:(UIOffset)titlePositionAdjustment
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context:(NSString *)context {
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return [[self alloc] initWithViewControllers:viewControllers
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tabBarItemsAttributes:tabBarItemsAttributes
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imageInsets:imageInsets
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titlePositionAdjustment:titlePositionAdjustment
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context:context];
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}
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+ (instancetype)tabBarControllerWithViewControllers:(NSArray<UIViewController *> *)viewControllers
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tabBarItemsAttributes:(NSArray<NSDictionary *> *)tabBarItemsAttributes
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imageInsets:(UIEdgeInsets)imageInsets
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titlePositionAdjustment:(UIOffset)titlePositionAdjustment {
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return [[self alloc] initWithViewControllers:viewControllers
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tabBarItemsAttributes:tabBarItemsAttributes
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imageInsets:imageInsets
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titlePositionAdjustment:titlePositionAdjustment
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context:nil];
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}
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+ (instancetype)tabBarControllerWithViewControllers:(NSArray<UIViewController *> *)viewControllers tabBarItemsAttributes:(NSArray<NSDictionary *> *)tabBarItemsAttributes {
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return [self tabBarControllerWithViewControllers:viewControllers
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tabBarItemsAttributes:tabBarItemsAttributes
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imageInsets:UIEdgeInsetsZero
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titlePositionAdjustment:UIOffsetZero];
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}
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- (void)hideTabBadgeBackgroundSeparator {
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[self.tabBar layoutIfNeeded];
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self.tabBar.cyl_tabBadgeBackgroundSeparator.alpha = 0;
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self.tabBar.barStyle = UIBarStyleBlack;
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}
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+ (BOOL)havePlusButton {
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if (CYLExternPlusButton) {
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return YES;
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}
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return NO;
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}
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+ (NSUInteger)allItemsInTabBarCount {
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NSUInteger allItemsInTabBar = CYLTabbarItemsCount;
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if ([CYLTabBarController havePlusButton]) {
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allItemsInTabBar += 1;
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}
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return allItemsInTabBar;
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}
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- (id<UIApplicationDelegate>)appDelegate {
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return [UIApplication sharedApplication].delegate;
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}
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- (UIWindow *)rootWindow {
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UIWindow *result = nil;
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do {
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if ([self.appDelegate respondsToSelector:@selector(window)]) {
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result = [self.appDelegate window];
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}
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if (result) {
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break;
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}
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} while (NO);
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return result;
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}
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#pragma mark -
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#pragma mark - Private Methods
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/**
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* 利用 KVC 把系统的 tabBar 类型改为自定义类型。
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*/
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- (void)setUpTabBar {
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CYLTabBar *tabBar = [[CYLTabBar alloc] init];
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[self setValue:tabBar forKey:@"tabBar"];
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[tabBar cyl_setTabBarController:self];
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}
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- (BOOL)hasPlusChildViewController {
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NSString *context = CYLPlusChildViewController.cyl_context;
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BOOL isSameContext = [context isEqualToString:self.context] && (context && self.context); // || (!context && !self.context);
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BOOL hasPlusChildViewController = CYLPlusChildViewController && isSameContext;//&& !isAdded;
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return hasPlusChildViewController;
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}
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- (BOOL)isPlusViewControllerAdded:(NSArray *)viewControllers {
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if ([_viewControllers containsObject:CYLPlusChildViewController]) {
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return YES;
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}
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__block BOOL isAdded = NO;
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[_viewControllers enumerateObjectsUsingBlock:^(UIViewController * _Nonnull obj, NSUInteger idx, BOOL * _Nonnull stop) {
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if ([self isEqualViewController:obj compairedViewController:CYLPlusChildViewController]) {
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isAdded = YES;
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*stop = YES;
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return;
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}
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}];
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return isAdded;;
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}
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- (void)setViewControllers:(NSArray *)viewControllers {
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if (_viewControllers && _viewControllers.count) {
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for (UIViewController *viewController in _viewControllers) {
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[viewController willMoveToParentViewController:nil];
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[viewController.view removeFromSuperview];
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[viewController removeFromParentViewController];
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}
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BOOL isAdded = [self isPlusViewControllerAdded:_viewControllers];
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BOOL hasPlusChildViewController = [self hasPlusChildViewController] && !isAdded;
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if (hasPlusChildViewController) {
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[CYLPlusChildViewController willMoveToParentViewController:nil];
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[CYLPlusChildViewController.view removeFromSuperview];
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[CYLPlusChildViewController removeFromParentViewController];
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}
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}
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if (viewControllers && [viewControllers isKindOfClass:[NSArray class]]) {
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if ((!_tabBarItemsAttributes) || (_tabBarItemsAttributes.count != viewControllers.count)) {
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[NSException raise:NSStringFromClass([CYLTabBarController class]) format:@"The count of CYLTabBarControllers is not equal to the count of tabBarItemsAttributes.【Chinese】设置_tabBarItemsAttributes属性时，请确保元素个数与控制器的个数相同，并在方法`-setViewControllers:`之前设置"];
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}
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//TODO:
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BOOL isAdded = [self isPlusViewControllerAdded:_viewControllers];
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BOOL addedFlag = [CYLPlusChildViewController cyl_plusViewControllerEverAdded];
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BOOL hasPlusChildViewController = [self hasPlusChildViewController] && !isAdded && !addedFlag;
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if (hasPlusChildViewController) {
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NSMutableArray *viewControllersWithPlusButton = [NSMutableArray arrayWithArray:viewControllers];
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[viewControllersWithPlusButton insertObject:CYLPlusChildViewController atIndex:CYLPlusButtonIndex];
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_viewControllers = [viewControllersWithPlusButton copy];
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[CYLPlusChildViewController cyl_setPlusViewControllerEverAdded:YES];
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} else {
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_viewControllers = [viewControllers copy];
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}
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CYLTabbarItemsCount = [viewControllers count];
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CYLTabBarItemWidth = ([UIScreen mainScreen].bounds.size.width - CYLPlusButtonWidth) / (CYLTabbarItemsCount);
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NSUInteger idx = 0;
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for (UIViewController *viewController in _viewControllers) {
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NSString *title = nil;
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id normalImageInfo = nil;
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id selectedImageInfo = nil;
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UIOffset titlePositionAdjustment = UIOffsetZero;
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UIEdgeInsets imageInsets = UIEdgeInsetsZero;
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if (viewController != CYLPlusChildViewController) {
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title = _tabBarItemsAttributes[idx][CYLTabBarItemTitle];
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normalImageInfo = _tabBarItemsAttributes[idx][CYLTabBarItemImage];
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selectedImageInfo = _tabBarItemsAttributes[idx][CYLTabBarItemSelectedImage];
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NSValue *offsetValue = _tabBarItemsAttributes[idx][CYLTabBarItemTitlePositionAdjustment];
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UIOffset offset = [offsetValue UIOffsetValue];
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titlePositionAdjustment = offset;
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NSValue *insetsValue = _tabBarItemsAttributes[idx][CYLTabBarItemImageInsets];
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UIEdgeInsets insets = [insetsValue UIEdgeInsetsValue];
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imageInsets = insets;
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} else {
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idx--;
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}
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[self addOneChildViewController:viewController
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WithTitle:title
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normalImageInfo:normalImageInfo
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selectedImageInfo:selectedImageInfo
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titlePositionAdjustment:titlePositionAdjustment
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imageInsets:imageInsets
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];
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[[viewController cyl_getViewControllerInsteadOfNavigationController] cyl_setTabBarController:self];
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idx++;
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}
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} else {
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for (UIViewController *viewController in _viewControllers) {
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[[viewController cyl_getViewControllerInsteadOfNavigationController] cyl_setTabBarController:nil];
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}
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_viewControllers = nil;
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}
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}
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- (void)setTintColor:(UIColor *)tintColor {
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if ([[[UIDevice currentDevice] systemVersion] floatValue] < 8.f) {
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[self.tabBar setSelectedImageTintColor:tintColor];
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}
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self.tabBar.tintColor = tintColor;
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}
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/**
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* 添加一个子控制器
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*
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* @param viewController 控制器
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* @param title 标题
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* @param normalImageInfo 图片
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* @param selectedImageInfo 选中图片
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*/
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- (void)addOneChildViewController:(UIViewController *)viewController
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WithTitle:(NSString *)title
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normalImageInfo:(id)normalImageInfo
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selectedImageInfo:(id)selectedImageInfo
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titlePositionAdjustment:(UIOffset)titlePositionAdjustment
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imageInsets:(UIEdgeInsets)imageInsets
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{
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viewController.tabBarItem.title = title;
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if (normalImageInfo) {
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UIImage *normalImage = [self getImageFromImageInfo:normalImageInfo];
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viewController.tabBarItem.image = normalImage;
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}
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if (selectedImageInfo) {
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UIImage *selectedImage = [self getImageFromImageInfo:selectedImageInfo];
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viewController.tabBarItem.selectedImage = selectedImage;
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}
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if (self.shouldCustomizeImageInsets || ([self isNOTEmptyForImageInsets:imageInsets])) {
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UIEdgeInsets insets = (([self isNOTEmptyForImageInsets:imageInsets]) ? imageInsets : self.imageInsets);
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viewController.tabBarItem.imageInsets = insets;
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}
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if (self.shouldCustomizeTitlePositionAdjustment || [self isNOTEmptyForTitlePositionAdjustment:titlePositionAdjustment]) {
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UIOffset offset = (([self isNOTEmptyForTitlePositionAdjustment:titlePositionAdjustment]) ? titlePositionAdjustment : self.titlePositionAdjustment);
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viewController.tabBarItem.titlePositionAdjustment = offset;
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}
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[self addChildViewController:viewController];
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}
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- (UIImage *)getImageFromImageInfo:(id)imageInfo {
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UIImage *image = nil;
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if ([imageInfo isKindOfClass:[NSString class]]) {
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image = [UIImage imageNamed:imageInfo];
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image = [image imageWithRenderingMode:UIImageRenderingModeAlwaysOriginal];
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} else if ([imageInfo isKindOfClass:[UIImage class]]) {
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image = (UIImage *)imageInfo;
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}
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return image;
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}
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- (BOOL)shouldCustomizeImageInsets {
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BOOL shouldCustomizeImageInsets = [self isNOTEmptyForImageInsets:self.imageInsets];
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return shouldCustomizeImageInsets;
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}
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- (BOOL)shouldCustomizeTitlePositionAdjustment {
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BOOL shouldCustomizeTitlePositionAdjustment = [self isNOTEmptyForTitlePositionAdjustment:self.titlePositionAdjustment];
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return shouldCustomizeTitlePositionAdjustment;
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}
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- (BOOL)isNOTEmptyForImageInsets:(UIEdgeInsets)imageInsets {
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if (imageInsets.top != 0 || imageInsets.left != 0 || imageInsets.bottom != 0 || imageInsets.right != 0) {
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return YES;
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}
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return NO;
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}
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- (BOOL)isNOTEmptyForTitlePositionAdjustment:(UIOffset)titlePositionAdjustment {
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if (titlePositionAdjustment.horizontal != 0 || titlePositionAdjustment.vertical != 0) {
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return YES;
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}
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return NO;
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}
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#pragma mark -
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#pragma mark - KVO Method
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// KVO监听执行
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- (void)observeValueForKeyPath:(NSString *)keyPath ofObject:(id)object change:(NSDictionary *)change context:(void *)context {
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if(context != CYLTabImageViewDefaultOffsetContext) {
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[super observeValueForKeyPath:keyPath ofObject:object change:change context:context];
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return;
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}
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if(context == CYLTabImageViewDefaultOffsetContext) {
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CGFloat tabImageViewDefaultOffset = [change[NSKeyValueChangeNewKey] floatValue];
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[self offsetTabBarTabImageViewToFit:tabImageViewDefaultOffset];
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}
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}
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- (void)offsetTabBarTabImageViewToFit:(CGFloat)tabImageViewDefaultOffset {
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if (self.shouldCustomizeImageInsets) {
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return;
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}
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NSArray<UITabBarItem *> *tabBarItems = self.tabBar.items;
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[tabBarItems enumerateObjectsUsingBlock:^(UITabBarItem * _Nonnull obj, NSUInteger idx, BOOL * _Nonnull stop) {
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UIEdgeInsets imageInset = UIEdgeInsetsMake(tabImageViewDefaultOffset, 0, -tabImageViewDefaultOffset, 0);
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obj.imageInsets = imageInset;
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if (!self.shouldCustomizeTitlePositionAdjustment) {
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obj.titlePositionAdjustment = UIOffsetMake(0, MAXFLOAT);
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}
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}];
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}
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#pragma mark - delegate
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- (void)updateSelectionStatusIfNeededForTabBarController:(UITabBarController *)tabBarController shouldSelectViewController:(UIViewController *)viewController {
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UIButton *plusButton = CYLExternPlusButton;
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CYLTabBarController *tabBarViewController = [[CYLPlusChildViewController cyl_getViewControllerInsteadOfNavigationController] cyl_tabBarController];
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NSArray *viewControllers = tabBarViewController.viewControllers;
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BOOL isAdded = [self isPlusViewControllerAdded:viewControllers];
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BOOL hasPlusChildViewController = isAdded;
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BOOL isNotCurrentViewController = ![self isEqualViewController:viewController compairedViewController:CYLPlusChildViewController];
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BOOL shouldConfigureSelectionStatus = (hasPlusChildViewController && isNotCurrentViewController);
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if (shouldConfigureSelectionStatus) {
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plusButton.selected = NO;
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}
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}
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- (BOOL)isEqualViewController:(UIViewController *)viewController compairedViewController:(UIViewController *)compairedViewController {
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if ([viewController isEqual:compairedViewController]) {
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return YES;
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}
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if ([[viewController cyl_getViewControllerInsteadOfNavigationController] isEqual:[compairedViewController cyl_getViewControllerInsteadOfNavigationController]]) {
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return YES;
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}
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return NO;
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}
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- (BOOL)tabBarController:(UITabBarController *)tabBarController shouldSelectViewController:(UIViewController *)viewController {
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[self updateSelectionStatusIfNeededForTabBarController:tabBarController shouldSelectViewController:viewController];
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return YES;
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}
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- (void)tabBarController:(UITabBarController *)tabBarController didSelectControl:(UIControl *)control {
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}
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- (void)didSelectControl:(UIControl *)control {
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SEL actin = @selector(tabBarController:didSelectControl:);
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if ([self.delegate respondsToSelector:actin]) {
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#pragma clang diagnostic push
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#pragma clang diagnostic ignored "-Warc-performSelector-leaks"
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[self.delegate performSelector:actin withObject:self withObject:control];
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#pragma clang diagnostic pop
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}
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}
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- (id)rootViewController {
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CYLTabBarController *tabBarController = nil;
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id<UIApplicationDelegate> delegate = ((id<UIApplicationDelegate>)[[UIApplication sharedApplication] delegate]);
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UIWindow *window = delegate.window;
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UIViewController *rootViewController = [window.rootViewController cyl_getViewControllerInsteadOfNavigationController];;
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if ([rootViewController isKindOfClass:[CYLTabBarController class]]) {
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tabBarController = (CYLTabBarController *)rootViewController;
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}
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return tabBarController;
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}
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@end
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@implementation NSObject (CYLTabBarControllerReferenceExtension)
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- (void)cyl_setTabBarController:(CYLTabBarController *)tabBarController {
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//OBJC_ASSOCIATION_ASSIGN instead of OBJC_ASSOCIATION_RETAIN_NONATOMIC to avoid retain circle
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id __weak weakObject = tabBarController;
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id (^block)() = ^{ return weakObject; };
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objc_setAssociatedObject(self, @selector(cyl_tabBarController),
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block, OBJC_ASSOCIATION_RETAIN_NONATOMIC);
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}
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- (CYLTabBarController *)cyl_tabBarController {
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CYLTabBarController *tabBarController;
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id (^block)() = objc_getAssociatedObject(self, @selector(cyl_tabBarController));
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tabBarController = (block ? block() : nil);
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if (tabBarController && [tabBarController isKindOfClass:[CYLTabBarController class]]) {
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return tabBarController;
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}
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if ([self isKindOfClass:[UIViewController class]] && [(UIViewController *)self parentViewController]) {
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tabBarController = [[(UIViewController *)self parentViewController] cyl_tabBarController];
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if ([tabBarController isKindOfClass:[CYLTabBarController class]]) {
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return tabBarController;
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}
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}
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id<UIApplicationDelegate> delegate = ((id<UIApplicationDelegate>)[[UIApplication sharedApplication] delegate]);
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UIWindow *window = delegate.window;
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UIViewController *rootViewController = [window.rootViewController cyl_getViewControllerInsteadOfNavigationController];;
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if ([rootViewController isKindOfClass:[CYLTabBarController class]]) {
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tabBarController = (CYLTabBarController *)rootViewController;
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}
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return tabBarController;
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}
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@end
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