iOS开发：Toast for iPhone 实例分享

分享一个我写的类似于android的toast的提示框

主要特点：

1，支持屏幕Y轴任意位置显示，设置距离顶/底端距离

2，支持多行文本

3，支持设置等待时间

4，支持点击隐藏，屏幕旋转时自动隐藏，淡入淡出

5，无需初始化，类方法调用

效果图：

全部代码如下，使用时需要添加QuartzCore.framework，希望能给大家带来方便。

#import <Foundation/Foundation.h> #define DEFAULT_DISPLAY_DURATION 2.0f @interface OMGToast : NSObject { NSString *text; UIButton *contentView; CGFloat duration; } + (void)showWithText:(NSString *) text_; + (void)showWithText:(NSString *) text_ duration:(CGFloat)duration_; + (void)showWithText:(NSString *) text_ topOffset:(CGFloat) topOffset_; + (void)showWithText:(NSString *) text_ topOffset:(CGFloat) topOffset duration:(CGFloat) duration_; + (void)showWithText:(NSString *) text_ bottomOffset:(CGFloat) bottomOffset_; + (void)showWithText:(NSString *) text_ bottomOffset:(CGFloat) bottomOffset_ duration:(CGFloat) duration_; @end

#import "OMGToast.h" #import <QuartzCore/QuartzCore.h> @interface OMGToast (private) - (id)initWithText:(NSString *)text_; - (void)setDuration:(CGFloat) duration_; - (void)dismisToast; - (void)toastTaped:(UIButton *)sender_; - (void)showAnimation; - (void)hideAnimation; - (void)show; - (void)showFromTopOffset:(CGFloat) topOffset_; - (void)showFromBottomOffset:(CGFloat) bottomOffset_; @end @implementation OMGToast - (void)dealloc{ [[NSNotificationCenter defaultCenter] removeObserver:self name:UIDeviceOrientationDidChangeNotification object:[UIDevice currentDevice]]; [contentView release],contentView = nil; [text release],text = nil; [super dealloc]; } - (id)initWithText:(NSString *)text_{ if (self = [super init]) { text = [text_ copy]; UIFont *font = [UIFont boldSystemFontOfSize:14]; CGSize textSize = [text sizeWithFont:font constrainedToSize:CGSizeMake(280, MAXFLOAT) lineBreakMode:UILineBreakModeWordWrap]; UILabel *textLabel = [[UILabel alloc] initWithFrame:CGRectMake(0, 0, textSize.width + 12, textSize.height + 12)]; textLabel.backgroundColor = [UIColor clearColor]; textLabel.textColor = [UIColor whiteColor]; textLabel.textAlignment = UITextAlignmentCenter; textLabel.font = font; textLabel.text = text; textLabel.numberOfLines = 0; contentView = [[UIButton alloc] initWithFrame:CGRectMake(0, 0, textLabel.frame.size.width, textLabel.frame.size.height)]; contentView.layer.cornerRadius = 5.0f; contentView.layer.borderWidth = 1.0f; contentView.layer.borderColor = [[UIColor grayColor] colorWithAlphaComponent:0.5].CGColor; contentView.backgroundColor = [UIColor colorWithRed:0.2f green:0.2f blue:0.2f alpha:0.75f]; [contentView addSubview:textLabel]; contentView.autoresizingMask = UIViewAutoresizingFlexibleWidth; [contentView addTarget:self action:@selector(toastTaped:) forControlEvents:UIControlEventTouchDown]; contentView.alpha = 0.0f; [textLabel release]; duration = DEFAULT_DISPLAY_DURATION; [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(deviceOrientationDidChanged:) name:UIDeviceOrientationDidChangeNotification object:[UIDevice currentDevice]]; } return self; } - (void)deviceOrientationDidChanged:(NSNotification *)notify_{ [self hideAnimation]; } -(void)dismissToast{ [contentView removeFromSuperview]; } -(void)toastTaped:(UIButton *)sender_{ [self hideAnimation]; } - (void)setDuration:(CGFloat) duration_{ duration = duration_; } -(void)showAnimation{ [UIView beginAnimations:@"show" context:NULL]; [UIView setAnimationCurve:UIViewAnimationCurveEaseIn]; [UIView setAnimationDuration:0.3]; contentView.alpha = 1.0f; [UIView commitAnimations]; } -(void)hideAnimation{ [UIView beginAnimations:@"hide" context:NULL]; [UIView setAnimationCurve:UIViewAnimationCurveEaseOut]; [UIView setAnimationDelegate:self]; [UIView setAnimationDidStopSelector:@selector(dismissToast)]; [UIView setAnimationDuration:0.3]; contentView.alpha = 0.0f; [UIView commitAnimations]; } - (void)show{ UIWindow *window = [UIApplication sharedApplication].keyWindow; contentView.center = window.center; [window addSubview:contentView]; [self showAnimation]; [self performSelector:@selector(hideAnimation) withObject:nil afterDelay:duration]; } - (void)showFromTopOffset:(CGFloat) top_{ UIWindow *window = [UIApplication sharedApplication].keyWindow; contentView.center = CGPointMake(window.center.x, top_ + contentView.frame.size.height/2); [window addSubview:contentView]; [self showAnimation]; [self performSelector:@selector(hideAnimation) withObject:nil afterDelay:duration]; } - (void)showFromBottomOffset:(CGFloat) bottom_{ UIWindow *window = [UIApplication sharedApplication].keyWindow; contentView.center = CGPointMake(window.center.x, window.frame.size.height-(bottom_ + contentView.frame.size.height/2)); [window addSubview:contentView]; [self showAnimation]; [self performSelector:@selector(hideAnimation) withObject:nil afterDelay:duration]; } + (void)showWithText:(NSString *)text_{ [OMGToast showWithText:text_ duration:DEFAULT_DISPLAY_DURATION]; } + (void)showWithText:(NSString *)text_ duration:(CGFloat)duration_{ OMGToast *toast = [[[OMGToast alloc] initWithText:text_] autorelease]; [toast setDuration:duration_]; [toast show]; } + (void)showWithText:(NSString *)text_ topOffset:(CGFloat)topOffset_{ [OMGToast showWithText:text_ topOffset:topOffset_ duration:DEFAULT_DISPLAY_DURATION]; } + (void)showWithText:(NSString *)text_ topOffset:(CGFloat)topOffset_ duration:(CGFloat)duration_{ OMGToast *toast = [[[OMGToast alloc] initWithText:text_] autorelease]; [toast setDuration:duration_]; [toast showFromTopOffset:topOffset_]; } + (void)showWithText:(NSString *)text_ bottomOffset:(CGFloat)bottomOffset_{ [OMGToast showWithText:text_ bottomOffset:bottomOffset_ duration:DEFAULT_DISPLAY_DURATION]; } + (void)showWithText:(NSString *)text_ bottomOffset:(CGFloat)bottomOffset_ duration:(CGFloat)duration_{ OMGToast *toast = [[[OMGToast alloc] initWithText:text_] autorelease]; [toast setDuration:duration_]; [toast showFromBottomOffset:bottomOffset_]; } @end

可以这样来使用

[OMGToast showWithText:@"中间显示" duration:5]; [OMGToast showWithText:@"距离上方50像素" topOffset:50 duration:5]; [OMGToast showWithText:@"文字很多的时候，我就会自动折行，最大宽度280像素" topOffset:100 duration:5]; [OMGToast showWithText:@"加入\\n也可以\n显示\n多\n行" topOffset:300 duration:5]; [OMGToast showWithText:@"距离下方3像素" bottomOffset:3 duration:5];