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。

[cpp] view
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#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  

[cpp] view
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#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

[cpp] view
plaincopyprint?

[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];  
转自：http://blog.csdn.net/iBright/article/details/7078436