iOS开发：Toast for iPhone

iOS开发：Toast for iPhone 

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。

1. #import <Foundation/Foundation.h>  
2. #define DEFAULT_DISPLAY_DURATION 2.0f  
3. @interface OMGToast : NSObject {  
4.     NSString *text;  
5.     UIButton *contentView;  
6.     CGFloat  duration;  
7. }  
8. + (void)showWithText:(NSString *) text_;  
9. + (void)showWithText:(NSString *) text_  
10.             duration:(CGFloat)duration_;  
12.            topOffset:(CGFloat) topOffset_;  
14.            topOffset:(CGFloat) topOffset  
15.             duration:(CGFloat) duration_;  
17.         bottomOffset:(CGFloat) bottomOffset_;  
19.         bottomOffset:(CGFloat) bottomOffset_  
21. @end  

1. #import "OMGToast.h"  
2. #import <QuartzCore/QuartzCore.h>  
3. @interface OMGToast (private)  
4. - (id)initWithText:(NSString *)text_;  
5. - (void)setDuration:(CGFloat) duration_;  
6. - (void)dismisToast;  
7. - (void)toastTaped:(UIButton *)sender_;  
8. - (void)showAnimation;  
9. - (void)hideAnimation;  
10. - (void)show;  
11. - (void)showFromTopOffset:(CGFloat) topOffset_;  
12. - (void)showFromBottomOffset:(CGFloat) bottomOffset_;  
14. @implementation OMGToast  
15. - (void)dealloc{  
16.     [[NSNotificationCenter defaultCenter] removeObserver:self  
17.                                                     name:UIDeviceOrientationDidChangeNotification  
18.                                                   object:[UIDevice currentDevice]];  
19.     [contentView release],contentView = nil;  
20.     [text release],text = nil;  
21.     [super dealloc];      
23. - (id)initWithText:(NSString *)text_{  
24.     if (self = [super init]) {  
25.         text = [text_ copy];  
26.         UIFont *font = [UIFont boldSystemFontOfSize:14];  
27.         CGSize textSize = [text sizeWithFont:font  
28.                            constrainedToSize:CGSizeMake(280, MAXFLOAT)  
29.                                lineBreakMode:UILineBreakModeWordWrap];  
30.         UILabel *textLabel = [[UILabel alloc] initWithFrame:CGRectMake(0, 0, textSize.width + 12, textSize.height + 12)];  
31.         textLabel.backgroundColor = [UIColor clearColor];  
32.         textLabel.textColor = [UIColor whiteColor];  
33.         textLabel.textAlignment = UITextAlignmentCenter;  
34.         textLabel.font = font;  
35.         textLabel.text = text;  
36.         textLabel.numberOfLines = 0;  
37.         contentView = [[UIButton alloc] initWithFrame:CGRectMake(0, 0, textLabel.frame.size.width, textLabel.frame.size.height)];  
38.         contentView.layer.cornerRadius = 5.0f;  
39.         contentView.layer.borderWidth = 1.0f;  
40.         contentView.layer.borderColor = [[UIColor grayColor] colorWithAlphaComponent:0.5].CGColor;  
41.         contentView.backgroundColor = [UIColor colorWithRed:0.2f  
42.                                                       green:0.2f  
43.                                                        blue:0.2f  
44.                                                       alpha:0.75f];  
45.         [contentView addSubview:textLabel];  
46.         contentView.autoresizingMask = UIViewAutoresizingFlexibleWidth;  
47.         [contentView addTarget:self  
48.                         action:@selector(toastTaped:)  
49.               forControlEvents:UIControlEventTouchDown];  
50.         contentView.alpha = 0.0f;  
51.         [textLabel release];  
52.         duration = DEFAULT_DISPLAY_DURATION;  
53.         [[NSNotificationCenter defaultCenter] addObserver:self  
54.                                                  selector:@selector(deviceOrientationDidChanged:)  
55.                                                      name:UIDeviceOrientationDidChangeNotification  
56.                                                    object:[UIDevice currentDevice]];  
57.     }  
58.     return self;  
60. - (void)deviceOrientationDidChanged:(NSNotification *)notify_{  
61.     [self hideAnimation];  
63. -(void)dismissToast{  
64.     [contentView removeFromSuperview];  
66. -(void)toastTaped:(UIButton *)sender_{  
69. - (void)setDuration:(CGFloat) duration_{  
70.     duration = duration_;  
72. -(void)showAnimation{  
73.     [UIView beginAnimations:@"show" context:NULL];  
74.     [UIView setAnimationCurve:UIViewAnimationCurveEaseIn];  
75.     [UIView setAnimationDuration:0.3];  
76.     contentView.alpha = 1.0f;  
77.     [UIView commitAnimations];  
79. -(void)hideAnimation{  
80.     [UIView beginAnimations:@"hide" context:NULL];  
81.     [UIView setAnimationCurve:UIViewAnimationCurveEaseOut];  
82.     [UIView setAnimationDelegate:self];  
83.     [UIView setAnimationDidStopSelector:@selector(dismissToast)];  
85.     contentView.alpha = 0.0f;  
88. - (void)show{  
89.     UIWindow *window = [UIApplication sharedApplication].keyWindow;  
90.     contentView.center = window.center;  
91.     [window  addSubview:contentView];  
92.     [self showAnimation];  
93.     [self performSelector:@selector(hideAnimation) withObject:nil afterDelay:duration];  
95. - (void)showFromTopOffset:(CGFloat) top_{  
97.     contentView.center = CGPointMake(window.center.x, top_ + contentView.frame.size.height/2);  
102. - (void)showFromBottomOffset:(CGFloat) bottom_{  
103.     UIWindow *window = [UIApplication sharedApplication].keyWindow;      
104.     contentView.center = CGPointMake(window.center.x, window.frame.size.height-(bottom_ + contentView.frame.size.height/2));  
109. + (void)showWithText:(NSString *)text_{  
110.     [OMGToast showWithText:text_ duration:DEFAULT_DISPLAY_DURATION];  
112. + (void)showWithText:(NSString *)text_  
113.             duration:(CGFloat)duration_{  
114.     OMGToast *toast = [[[OMGToast alloc] initWithText:text_] autorelease];  
115.     [toast setDuration:duration_];  
116.     [toast show];  
119.            topOffset:(CGFloat)topOffset_{  
120.     [OMGToast showWithText:text_  topOffset:topOffset_ duration:DEFAULT_DISPLAY_DURATION];  
123.            topOffset:(CGFloat)topOffset_  
127.     [toast showFromTopOffset:topOffset_];  
130.            bottomOffset:(CGFloat)bottomOffset_{  
131.     [OMGToast showWithText:text_  bottomOffset:bottomOffset_ duration:DEFAULT_DISPLAY_DURATION];  
134.         bottomOffset:(CGFloat)bottomOffset_  
138.     [toast showFromBottomOffset:bottomOffset_];  

1. [OMGToast showWithText:@"中间显示" duration:5];  
2. [OMGToast showWithText:@"距离上方50像素" topOffset:50 duration:5];  
3. [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];  
4. [OMGToast showWithText:@"加入\\n也可以\n显示\n多\n行" topOffset:300 duration:5];  
5. [OMGToast showWithText:@"距离下方3像素" bottomOffset:3 duration:5];