//
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// UIView+Toast.m
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// Toast
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//
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// Copyright 2014 Charles Scalesse.
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//
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#import "UIView+Toast.h"
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#import <QuartzCore/QuartzCore.h>
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#import <objc/runtime.h>
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/*
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* CONFIGURE THESE VALUES TO ADJUST LOOK & FEEL,
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* DISPLAY DURATION, ETC.
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*/
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// general appearance
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static const CGFloat CSToastMaxWidth = 0.8; // 80% of parent view width
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static const CGFloat CSToastMaxHeight = 0.8; // 80% of parent view height
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static const CGFloat CSToastHorizontalPadding = 10.0;
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static const CGFloat CSToastVerticalPadding = 10.0;
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static const CGFloat CSToastCornerRadius = 10.0;
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static const CGFloat CSToastOpacity = 0.8;
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static const CGFloat CSToastFontSize = 16.0;
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static const CGFloat CSToastMaxTitleLines = 0;
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static const CGFloat CSToastMaxMessageLines = 0;
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static const NSTimeInterval CSToastFadeDuration = 0.2;
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// shadow appearance
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static const CGFloat CSToastShadowOpacity = 0.8;
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static const CGFloat CSToastShadowRadius = 6.0;
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static const CGSize CSToastShadowOffset = { 4.0, 4.0 };
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static const BOOL CSToastDisplayShadow = YES;
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// display duration
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static const NSTimeInterval CSToastDefaultDuration = 3.0;
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// image view size
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static const CGFloat CSToastImageViewWidth = 80.0;
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static const CGFloat CSToastImageViewHeight = 80.0;
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// activity
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static const CGFloat CSToastActivityWidth = 100.0;
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static const CGFloat CSToastActivityHeight = 100.0;
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static const NSString * CSToastActivityDefaultPosition = @"center";
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// interaction
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static const BOOL CSToastHidesOnTap = YES; // excludes activity views
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// associative reference keys
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static const NSString * CSToastTimerKey = @"CSToastTimerKey";
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static const NSString * CSToastActivityViewKey = @"CSToastActivityViewKey";
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static const NSString * CSToastTapCallbackKey = @"CSToastTapCallbackKey";
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// positions
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NSString * const CSToastPositionTop = @"top";
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NSString * const CSToastPositionCenter = @"center";
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NSString * const CSToastPositionBottom = @"bottom";
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NSString * const CSToastPositionAboveBottom = @"aboveBottom";
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@interface UIView (ToastPrivate)
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- (void)hideToast:(UIView *)toast;
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- (void)toastTimerDidFinish:(NSTimer *)timer;
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- (void)handleToastTapped:(UITapGestureRecognizer *)recognizer;
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- (CGPoint)centerPointForPosition:(id)position withToast:(UIView *)toast;
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- (UIView *)viewForMessage:(NSString *)message title:(NSString *)title image:(UIImage *)image;
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- (CGSize)sizeForString:(NSString *)string font:(UIFont *)font constrainedToSize:(CGSize)constrainedSize lineBreakMode:(NSLineBreakMode)lineBreakMode;
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@end
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@implementation UIView (Toast)
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#pragma mark - Toast Methods
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- (void)makeToast:(NSString *)message {
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[self makeToast:message duration:CSToastDefaultDuration position:CSToastPositionAboveBottom];
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}
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- (void)makeToast:(NSString *)message duration:(NSTimeInterval)duration position:(id)position {
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UIView *toast = [self viewForMessage:message title:nil image:nil];
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[self showToast:toast duration:duration position:position];
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}
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- (void)makeToast:(NSString *)message duration:(NSTimeInterval)duration position:(id)position title:(NSString *)title {
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UIView *toast = [self viewForMessage:message title:title image:nil];
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[self showToast:toast duration:duration position:position];
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}
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- (void)makeToast:(NSString *)message duration:(NSTimeInterval)duration position:(id)position image:(UIImage *)image {
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UIView *toast = [self viewForMessage:message title:nil image:image];
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[self showToast:toast duration:duration position:position];
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}
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- (void)makeToast:(NSString *)message duration:(NSTimeInterval)duration position:(id)position title:(NSString *)title image:(UIImage *)image {
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UIView *toast = [self viewForMessage:message title:title image:image];
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[self showToast:toast duration:duration position:position];
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}
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- (void)showToast:(UIView *)toast {
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[self showToast:toast duration:CSToastDefaultDuration position:nil];
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}
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- (void)showToast:(UIView *)toast duration:(NSTimeInterval)duration position:(id)position {
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[self showToast:toast duration:duration position:position tapCallback:nil];
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}
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- (void)showToast:(UIView *)toast duration:(NSTimeInterval)duration position:(id)position
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tapCallback:(void(^)(void))tapCallback
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{
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toast.center = [self centerPointForPosition:position withToast:toast];
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toast.alpha = 0.0;
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if (CSToastHidesOnTap) {
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UITapGestureRecognizer *recognizer = [[UITapGestureRecognizer alloc] initWithTarget:toast action:@selector(handleToastTapped:)];
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[toast addGestureRecognizer:recognizer];
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toast.userInteractionEnabled = YES;
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toast.exclusiveTouch = YES;
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}
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[self addSubview:toast];
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[UIView animateWithDuration:CSToastFadeDuration
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delay:0.0
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options:(UIViewAnimationOptionCurveEaseOut | UIViewAnimationOptionAllowUserInteraction)
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animations:^{
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toast.alpha = 1.0;
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} completion:^(BOOL finished) {
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NSTimer *timer = [NSTimer scheduledTimerWithTimeInterval:duration target:self selector:@selector(toastTimerDidFinish:) userInfo:toast repeats:NO];
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// associate the timer with the toast view
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objc_setAssociatedObject (toast, &CSToastTimerKey, timer, OBJC_ASSOCIATION_RETAIN_NONATOMIC);
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objc_setAssociatedObject (toast, &CSToastTapCallbackKey, tapCallback, OBJC_ASSOCIATION_RETAIN_NONATOMIC);
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}];
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}
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- (void)hideToast:(UIView *)toast {
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[UIView animateWithDuration:CSToastFadeDuration
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delay:0.0
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options:(UIViewAnimationOptionCurveEaseIn | UIViewAnimationOptionBeginFromCurrentState)
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animations:^{
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toast.alpha = 0.0;
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} completion:^(BOOL finished) {
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[toast removeFromSuperview];
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}];
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}
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#pragma mark - Events
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- (void)toastTimerDidFinish:(NSTimer *)timer {
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[self hideToast:(UIView *)timer.userInfo];
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}
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- (void)handleToastTapped:(UITapGestureRecognizer *)recognizer {
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NSTimer *timer = (NSTimer *)objc_getAssociatedObject(self, &CSToastTimerKey);
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[timer invalidate];
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void (^callback)(void) = objc_getAssociatedObject(self, &CSToastTapCallbackKey);
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if (callback) {
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callback();
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}
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[self hideToast:recognizer.view];
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}
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#pragma mark - Toast Activity Methods
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- (void)makeToastActivity {
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[self makeToastActivity:CSToastActivityDefaultPosition];
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}
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- (void)makeToastActivity:(id)position {
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// sanity
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UIView *existingActivityView = (UIView *)objc_getAssociatedObject(self, &CSToastActivityViewKey);
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if (existingActivityView != nil) return;
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UIView *activityView = [[UIView alloc] initWithFrame:CGRectMake(0, 0, CSToastActivityWidth, CSToastActivityHeight)];
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activityView.center = [self centerPointForPosition:position withToast:activityView];
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activityView.backgroundColor = [[UIColor blackColor] colorWithAlphaComponent:CSToastOpacity];
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activityView.alpha = 0.0;
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activityView.autoresizingMask = (UIViewAutoresizingFlexibleLeftMargin | UIViewAutoresizingFlexibleRightMargin | UIViewAutoresizingFlexibleTopMargin | UIViewAutoresizingFlexibleBottomMargin);
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activityView.layer.cornerRadius = CSToastCornerRadius;
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if (CSToastDisplayShadow) {
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activityView.layer.shadowColor = [UIColor blackColor].CGColor;
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activityView.layer.shadowOpacity = CSToastShadowOpacity;
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activityView.layer.shadowRadius = CSToastShadowRadius;
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activityView.layer.shadowOffset = CSToastShadowOffset;
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}
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UIActivityIndicatorView *activityIndicatorView = [[UIActivityIndicatorView alloc] initWithActivityIndicatorStyle:UIActivityIndicatorViewStyleWhiteLarge];
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activityIndicatorView.center = CGPointMake(activityView.bounds.size.width / 2, activityView.bounds.size.height / 2);
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[activityView addSubview:activityIndicatorView];
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[activityIndicatorView startAnimating];
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// associate the activity view with self
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objc_setAssociatedObject (self, &CSToastActivityViewKey, activityView, OBJC_ASSOCIATION_RETAIN_NONATOMIC);
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[self addSubview:activityView];
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[UIView animateWithDuration:CSToastFadeDuration
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delay:0.0
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options:UIViewAnimationOptionCurveEaseOut
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animations:^{
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activityView.alpha = 1.0;
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} completion:nil];
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}
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- (void)hideToastActivity {
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UIView *existingActivityView = (UIView *)objc_getAssociatedObject(self, &CSToastActivityViewKey);
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if (existingActivityView != nil) {
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[UIView animateWithDuration:CSToastFadeDuration
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delay:0.0
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options:(UIViewAnimationOptionCurveEaseIn | UIViewAnimationOptionBeginFromCurrentState)
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animations:^{
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existingActivityView.alpha = 0.0;
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} completion:^(BOOL finished) {
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[existingActivityView removeFromSuperview];
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objc_setAssociatedObject (self, &CSToastActivityViewKey, nil, OBJC_ASSOCIATION_RETAIN_NONATOMIC);
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}];
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}
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}
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#pragma mark - Helpers
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- (CGPoint)centerPointForPosition:(id)point withToast:(UIView *)toast {
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if([point isKindOfClass:[NSString class]]) {
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if([point caseInsensitiveCompare:CSToastPositionTop] == NSOrderedSame) {
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return CGPointMake(self.bounds.size.width/2, (toast.frame.size.height / 2) + CSToastVerticalPadding);
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} else if([point caseInsensitiveCompare:CSToastPositionCenter] == NSOrderedSame) {
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return CGPointMake(self.bounds.size.width / 2, self.bounds.size.height / 2);
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}
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else if ([point caseInsensitiveCompare:CSToastPositionAboveBottom] == NSOrderedSame){
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return CGPointMake(self.bounds.size.width / 2, self.bounds.size.height * 0.75);
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}
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} else if ([point isKindOfClass:[NSValue class]]) {
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return [point CGPointValue];
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}
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// default to bottom
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return CGPointMake(self.bounds.size.width/2, (self.bounds.size.height - (toast.frame.size.height / 2)) - CSToastVerticalPadding);
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}
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- (CGSize)sizeForString:(NSString *)string font:(UIFont *)font constrainedToSize:(CGSize)constrainedSize lineBreakMode:(NSLineBreakMode)lineBreakMode {
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if ([string respondsToSelector:@selector(boundingRectWithSize:options:attributes:context:)]) {
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NSMutableParagraphStyle *paragraphStyle = [[NSMutableParagraphStyle alloc] init];
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paragraphStyle.lineBreakMode = lineBreakMode;
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NSDictionary *attributes = @{NSFontAttributeName:font, NSParagraphStyleAttributeName:paragraphStyle};
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CGRect boundingRect = [string boundingRectWithSize:constrainedSize options:NSStringDrawingUsesLineFragmentOrigin attributes:attributes context:nil];
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return CGSizeMake(ceilf(boundingRect.size.width), ceilf(boundingRect.size.height));
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}
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#pragma clang diagnostic push
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#pragma clang diagnostic ignored "-Wdeprecated-declarations"
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return [string sizeWithFont:font constrainedToSize:constrainedSize lineBreakMode:lineBreakMode];
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#pragma clang diagnostic pop
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}
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- (UIView *)viewForMessage:(NSString *)message title:(NSString *)title image:(UIImage *)image {
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// sanity
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if((message == nil) && (title == nil) && (image == nil)) return nil;
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// dynamically build a toast view with any combination of message, title, & image.
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UILabel *messageLabel = nil;
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UILabel *titleLabel = nil;
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UIImageView *imageView = nil;
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// create the parent view
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UIView *wrapperView = [[UIView alloc] init];
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wrapperView.autoresizingMask = (UIViewAutoresizingFlexibleLeftMargin | UIViewAutoresizingFlexibleRightMargin | UIViewAutoresizingFlexibleTopMargin | UIViewAutoresizingFlexibleBottomMargin);
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wrapperView.layer.cornerRadius = CSToastCornerRadius;
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if (CSToastDisplayShadow) {
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wrapperView.layer.shadowColor = [UIColor blackColor].CGColor;
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wrapperView.layer.shadowOpacity = CSToastShadowOpacity;
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wrapperView.layer.shadowRadius = CSToastShadowRadius;
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wrapperView.layer.shadowOffset = CSToastShadowOffset;
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}
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wrapperView.backgroundColor = [[UIColor blackColor] colorWithAlphaComponent:CSToastOpacity];
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if(image != nil) {
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imageView = [[UIImageView alloc] initWithImage:image];
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imageView.contentMode = UIViewContentModeScaleAspectFit;
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imageView.frame = CGRectMake(CSToastHorizontalPadding, CSToastVerticalPadding, CSToastImageViewWidth, CSToastImageViewHeight);
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}
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CGFloat imageWidth, imageHeight, imageLeft;
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// the imageView frame values will be used to size & position the other views
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if(imageView != nil) {
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imageWidth = imageView.bounds.size.width;
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imageHeight = imageView.bounds.size.height;
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imageLeft = CSToastHorizontalPadding;
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} else {
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imageWidth = imageHeight = imageLeft = 0.0;
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}
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if (title != nil) {
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titleLabel = [[UILabel alloc] init];
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titleLabel.numberOfLines = CSToastMaxTitleLines;
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titleLabel.font = [UIFont boldSystemFontOfSize:CSToastFontSize];
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titleLabel.textAlignment = NSTextAlignmentLeft;
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titleLabel.lineBreakMode = NSLineBreakByWordWrapping;
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titleLabel.textColor = [UIColor whiteColor];
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titleLabel.backgroundColor = [UIColor clearColor];
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titleLabel.alpha = 1.0;
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titleLabel.text = title;
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// size the title label according to the length of the text
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CGSize maxSizeTitle = CGSizeMake((self.bounds.size.width * CSToastMaxWidth) - imageWidth, self.bounds.size.height * CSToastMaxHeight);
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CGSize expectedSizeTitle = [self sizeForString:title font:titleLabel.font constrainedToSize:maxSizeTitle lineBreakMode:titleLabel.lineBreakMode];
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titleLabel.frame = CGRectMake(0.0, 0.0, expectedSizeTitle.width, expectedSizeTitle.height);
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}
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if (message != nil) {
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messageLabel = [[UILabel alloc] init];
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messageLabel.numberOfLines = CSToastMaxMessageLines;
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messageLabel.font = [UIFont systemFontOfSize:CSToastFontSize];
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messageLabel.lineBreakMode = NSLineBreakByWordWrapping;
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messageLabel.textColor = [UIColor whiteColor];
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messageLabel.backgroundColor = [UIColor clearColor];
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messageLabel.alpha = 1.0;
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messageLabel.text = message;
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// size the message label according to the length of the text
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CGSize maxSizeMessage = CGSizeMake((self.bounds.size.width * CSToastMaxWidth) - imageWidth, self.bounds.size.height * CSToastMaxHeight);
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CGSize expectedSizeMessage = [self sizeForString:message font:messageLabel.font constrainedToSize:maxSizeMessage lineBreakMode:messageLabel.lineBreakMode];
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messageLabel.frame = CGRectMake(0.0, 0.0, expectedSizeMessage.width, expectedSizeMessage.height);
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}
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// titleLabel frame values
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CGFloat titleWidth, titleHeight, titleTop, titleLeft;
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if(titleLabel != nil) {
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titleWidth = titleLabel.bounds.size.width;
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titleHeight = titleLabel.bounds.size.height;
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titleTop = CSToastVerticalPadding;
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titleLeft = imageLeft + imageWidth + CSToastHorizontalPadding;
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} else {
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titleWidth = titleHeight = titleTop = titleLeft = 0.0;
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}
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// messageLabel frame values
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CGFloat messageWidth, messageHeight, messageLeft, messageTop;
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if(messageLabel != nil) {
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messageWidth = messageLabel.bounds.size.width;
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messageHeight = messageLabel.bounds.size.height;
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messageLeft = imageLeft + imageWidth + CSToastHorizontalPadding;
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messageTop = titleTop + titleHeight + CSToastVerticalPadding;
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} else {
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messageWidth = messageHeight = messageLeft = messageTop = 0.0;
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}
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CGFloat longerWidth = MAX(titleWidth, messageWidth);
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CGFloat longerLeft = MAX(titleLeft, messageLeft);
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// wrapper width uses the longerWidth or the image width, whatever is larger. same logic applies to the wrapper height
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CGFloat wrapperWidth = MAX((imageWidth + (CSToastHorizontalPadding * 2)), (longerLeft + longerWidth + CSToastHorizontalPadding));
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CGFloat wrapperHeight = MAX((messageTop + messageHeight + CSToastVerticalPadding), (imageHeight + (CSToastVerticalPadding * 2)));
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wrapperView.frame = CGRectMake(0.0, 0.0, wrapperWidth, wrapperHeight);
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if(titleLabel != nil) {
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titleLabel.frame = CGRectMake(titleLeft, titleTop, titleWidth, titleHeight);
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[wrapperView addSubview:titleLabel];
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}
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if(messageLabel != nil) {
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messageLabel.frame = CGRectMake(messageLeft, messageTop, messageWidth, messageHeight);
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[wrapperView addSubview:messageLabel];
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}
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if(imageView != nil) {
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[wrapperView addSubview:imageView];
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}
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return wrapperView;
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}
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@end
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