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_;
11. + (void)showWithText:(NSString *) text_
12. topOffset:(CGFloat) topOffset_;
13. + (void)showWithText:(NSString *) text_
14. topOffset:(CGFloat) topOffset
15. duration:(CGFloat) duration_;
16. + (void)showWithText:(NSString *) text_
17. bottomOffset:(CGFloat) bottomOffset_;
18. + (void)showWithText:(NSString *) text_
19. bottomOffset:(CGFloat) bottomOffset_
20. duration:(CGFloat) duration_;
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_;
13. @end
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];
22. }
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;
59. }
60. - (void)deviceOrientationDidChanged:(NSNotification *)notify_{
61. [self hideAnimation];
62. }
63. -(void)dismissToast{
64. [contentView removeFromSuperview];
65. }
66. -(void)toastTaped:(UIButton *)sender_{
67. [self hideAnimation];
68. }
69. - (void)setDuration:(CGFloat) duration_{
70. duration = duration_;
71. }
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];
78. }
79. -(void)hideAnimation{
80. [UIView beginAnimations:@"hide" context:NULL];
81. [UIView setAnimationCurve:UIViewAnimationCurveEaseOut];
82. [UIView setAnimationDelegate:self];
83. [UIView setAnimationDidStopSelector:@selector(dismissToast)];
84. [UIView setAnimationDuration:0.3];
85. contentView.alpha = 0.0f;
86. [UIView commitAnimations];
87. }
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];
94. }
95. - (void)showFromTopOffset:(CGFloat) top_{
96. UIWindow *window = [UIApplication sharedApplication].keyWindow;
97. contentView.center = CGPointMake(window.center.x, top_ + contentView.frame.size.height/2);
98. [window  addSubview:contentView];
99. [self showAnimation];
100. [self performSelector:@selector(hideAnimation) withObject:nil afterDelay:duration];
101. }
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));
105. [window  addSubview:contentView];
106. [self showAnimation];
107. [self performSelector:@selector(hideAnimation) withObject:nil afterDelay:duration];
108. }
109. + (void)showWithText:(NSString *)text_{
110. [OMGToast showWithText:text_ duration:DEFAULT_DISPLAY_DURATION];
111. }
112. + (void)showWithText:(NSString *)text_
113. duration:(CGFloat)duration_{
114. OMGToast *toast = [[[OMGToast alloc] initWithText:text_] autorelease];
115. [toast setDuration:duration_];
116. [toast show];
117. }
118. + (void)showWithText:(NSString *)text_
119. topOffset:(CGFloat)topOffset_{
120. [OMGToast showWithText:text_  topOffset:topOffset_ duration:DEFAULT_DISPLAY_DURATION];
121. }
122. + (void)showWithText:(NSString *)text_
123. topOffset:(CGFloat)topOffset_
124. duration:(CGFloat)duration_{
125. OMGToast *toast = [[[OMGToast alloc] initWithText:text_] autorelease];
126. [toast setDuration:duration_];
127. [toast showFromTopOffset:topOffset_];
128. }
129. + (void)showWithText:(NSString *)text_
130. bottomOffset:(CGFloat)bottomOffset_{
131. [OMGToast showWithText:text_  bottomOffset:bottomOffset_ duration:DEFAULT_DISPLAY_DURATION];
132. }
133. + (void)showWithText:(NSString *)text_
134. bottomOffset:(CGFloat)bottomOffset_
135. duration:(CGFloat)duration_{
136. OMGToast *toast = [[[OMGToast alloc] initWithText:text_] autorelease];
137. [toast setDuration:duration_];
138. [toast showFromBottomOffset:bottomOffset_];
139. }
140. @end

可以这样来使用

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];