//
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// LMJIntroductoryPagesView.m
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// iOSProject
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//
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// Created by windshan on 2017/12/29.
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// Copyright © 2017年 windshan. All rights reserved.
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//
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#import "LMJIntroductoryPagesView.h"
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@interface LMJIntroductoryPagesView ()<UIScrollViewDelegate>
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/** <#digest#> */
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@property (nonatomic, strong) NSArray<NSString *> *imagesArray;
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@property (nonatomic,strong) UIPageControl *pageControl;
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/** <#digest#> */
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@property (weak, nonatomic) UIScrollView *scrollView;
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@end
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@implementation LMJIntroductoryPagesView
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+ (instancetype)pagesViewWithFrame:(CGRect)frame images:(NSArray<NSString *> *)images
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{
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LMJIntroductoryPagesView *pagesView = [[self alloc] initWithFrame:frame];
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pagesView.imagesArray = images;
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return pagesView;
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}
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- (void)setupUIOnce
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{
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self.backgroundColor = [UIColor clearColor];
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//添加手势
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UITapGestureRecognizer *singleRecognizer;
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singleRecognizer = [[UITapGestureRecognizer alloc]initWithTarget:self action:@selector(handleSingleTapFrom)];
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singleRecognizer.numberOfTapsRequired = 1;
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[self.scrollView addGestureRecognizer:singleRecognizer];
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}
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- (void)setImagesArray:(NSArray<NSString *> *)imagesArray {
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_imagesArray = imagesArray;
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[self loadPageView];
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}
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- (void)loadPageView
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{
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[self.scrollView.subviews makeObjectsPerformSelector:@selector(removeFromSuperview)];
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self.scrollView.contentSize = CGSizeMake((self.imagesArray.count + 1) * kScreenWidth, kScreenHeight);
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self.pageControl.numberOfPages = self.imagesArray.count;
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[self.imagesArray enumerateObjectsUsingBlock:^(NSString * _Nonnull obj, NSUInteger idx, BOOL * _Nonnull stop) {
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YYAnimatedImageView *imageView = [[YYAnimatedImageView alloc]init];
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imageView.frame = CGRectMake(idx * kScreenWidth, 0, kScreenWidth, kScreenHeight);
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YYImage *image = [YYImage imageNamed:obj];
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[imageView setImage:image];
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[self.scrollView addSubview:imageView];
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}];
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}
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-(void)handleSingleTapFrom
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{
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if (_pageControl.currentPage == self.imagesArray.count-1) {
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[self removeFromSuperview];
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}
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}
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- (void)scrollViewDidScroll:(UIScrollView *)scrollView {
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CGPoint offSet = scrollView.contentOffset;
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NSInteger page = (offSet.x / (self.bounds.size.width) + 0.5);
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self.pageControl.currentPage = page;//计算当前的页码
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self.pageControl.hidden = (page > self.imagesArray.count - 1);
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}
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-(void)scrollViewDidEndDecelerating:(UIScrollView *)scrollView
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{
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if (scrollView.contentOffset.x >= (_imagesArray.count) * kScreenWidth) {
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[self removeFromSuperview];
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}
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}
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- (UIScrollView *)scrollView
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{
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if(!_scrollView)
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{
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UIScrollView *scrollView = [[UIScrollView alloc] initWithFrame:self.bounds];
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[self addSubview:scrollView];
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scrollView.backgroundColor = [UIColor clearColor];
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scrollView.pagingEnabled = YES;//设置分页
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scrollView.bounces = NO;
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scrollView.showsHorizontalScrollIndicator = NO;
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scrollView.delegate = self;
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_scrollView = scrollView;
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}
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return _scrollView;
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}
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- (UIPageControl *)pageControl
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{
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if(!_pageControl)
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{
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UIPageControl *pageControl = [[UIPageControl alloc]initWithFrame:CGRectMake(kScreenWidth/2, kScreenHeight - 60, 0, 40)];
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pageControl.backgroundColor = [UIColor RandomColor];
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pageControl.pageIndicatorTintColor = [UIColor RandomColor];
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pageControl.currentPageIndicatorTintColor = [UIColor RandomColor];
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[self addSubview:pageControl];
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_pageControl = pageControl;
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}
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return _pageControl;
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}
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- (instancetype)initWithFrame:(CGRect)frame
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{
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if (self = [super initWithFrame:frame]) {
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[self setupUIOnce];
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}
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return self;
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}
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- (void)awakeFromNib
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{
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[super awakeFromNib];
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[self setupUIOnce];
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}
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- (void)layoutSubviews
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{
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[super layoutSubviews];
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}
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@end
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