UIMenuController的使用，对UILabel拷贝以及定制菜单 .posted on 2013-03-18 16:20

1. Menu所处的View必须实现 – (BOOL)canBecomeFirstResponder, 且返回YES

2. Menu所处的View必须实现 – (BOOL)canPerformAction:withSender, 并根据需求返回YES或NO

3. 使Menu所处的View成为First Responder (becomeFirstResponder)

4. 定位Menu (- setTargetRect:inView:)

 

5. 展示Menu (- setMenuVisible:animated:)

 

 

1. @implementation UICopyLabel  
2.   
3. // default is NO   
4. - (BOOL)canBecomeFirstResponder{  
5.     return YES;  
6. }  
7.   
8. //"反馈"关心的功能     
9. -(BOOL)canPerformAction:(SEL)action withSender:(id)sender{    
10.     return (action == @selector(copy:));    
11. }    
12. //针对于copy的实现     
13. -(void)copy:(id)sender{    
14.     UIPasteboard *pboard = [UIPasteboard generalPasteboard];    
15.     pboard.string = self.text;    
16. }   
17.   
18. //UILabel默认是不接收事件的，我们需要自己添加touch事件     
19. -(void)attachTapHandler{    
20.     self.userInteractionEnabled = YES;  //用户交互的总开关     
21.     UITapGestureRecognizer *touch = [[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(handleTap:)];    
22.     touch.numberOfTapsRequired = 2;    
23.     [self addGestureRecognizer:touch];    
24.     [touch release];    
25. }    
26. //绑定事件     
27. - (id)initWithFrame:(CGRect)frame    
28. {    
29.     self = [super initWithFrame:frame];    
30.     if (self) {    
31.         [self attachTapHandler];    
32.     }    
33.     return self;    
34. }    
35. //同上     
36. -(void)awakeFromNib{    
37.     [super awakeFromNib];    
38.     [self attachTapHandler];    
39. }  
40.   
41. -(void)handleTap:(UIGestureRecognizer*) recognizer{    
42.     [self becomeFirstResponder];    
43.     UIMenuController *menu = [UIMenuController sharedMenuController];    
44.     [menu setTargetRect:self.frame inView:self.superview];    
45.     [menu setMenuVisible:YES animated:YES];    
46. }   
47.   
48.   
49. @end  

@implementation UICopyLabel// default is NO- (BOOL)canBecomeFirstResponder{    return YES;}//"反馈"关心的功能  -(BOOL)canPerformAction:(SEL)action withSender:(id)sender{      return (action == @selector(copy:));  }  //针对于copy的实现  -(void)copy:(id)sender{      UIPasteboard *pboard = [UIPasteboard generalPasteboard];      pboard.string = self.text;  } //UILabel默认是不接收事件的，我们需要自己添加touch事件  -(void)attachTapHandler{      self.userInteractionEnabled = YES;  //用户交互的总开关      UITapGestureRecognizer *touch = [[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(handleTap:)];      touch.numberOfTapsRequired = 2;      [self addGestureRecognizer:touch];      [touch release];  }  //绑定事件  - (id)initWithFrame:(CGRect)frame  {      self = [super initWithFrame:frame];      if (self) {          [self attachTapHandler];      }      return self;  }  //同上  -(void)awakeFromNib{      [super awakeFromNib];      [self attachTapHandler];  }-(void)handleTap:(UIGestureRecognizer*) recognizer{      [self becomeFirstResponder];      UIMenuController *menu = [UIMenuController sharedMenuController];      [menu setTargetRect:self.frame inView:self.superview];      [menu setMenuVisible:YES animated:YES];  } @end

 

在view里添加一个UICopyLabel

现在可以使用UICopyLabel实现双击来对label的内容copy了

在你的view中

 

UICopyLabel *display = [[UICopyLabelalloc]initWithFrame:CGRectMake(30,100,250,30)];

 

 

awakeFromNib

在使用IB的时候才会涉及到此方法的使用，当.nib文件被加载的时候，会发送一个awakeFromNib的消息到.nib文件中的每个对象，每个对象都可以定义自己的awakeFromNib函数来响应这个消息，执行一些必要的操作。

看例子：

创建一个viewController with XIB

 

 

定义一个UIView的子类

 

打开xib，并把View的类型指定为上一步骤定义的子类

 

然后在TestView.m中加入 awakeFromNib方法，运行程序发现此方法被调用了！！！

 

 

下面我们来定制菜单

在attachTapHandler中添加长按压手势

 

 

1. -(void)attachTapHandler{    
2.     self.userInteractionEnabled = YES;  //用户交互的总开关     
3.     //双击   
4.     UITapGestureRecognizer *touch = [[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(handleTap:)];    
5.     touch.numberOfTapsRequired = 2;    
6.     [self addGestureRecognizer:touch];   
7.      [touch release];   
8.       
9.     //长按压   
10.     UILongPressGestureRecognizer *press = [[UILongPressGestureRecognizer alloc]initWithTarget:self action:@selector(longPress:)];  
11.     press.minimumPressDuration = 1.0;  
12.     [self addGestureRecognizer:press];  
13.     [press release];  
14.       
15. }   

-(void)attachTapHandler{      self.userInteractionEnabled = YES;  //用户交互的总开关      //双击    UITapGestureRecognizer *touch = [[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(handleTap:)];      touch.numberOfTapsRequired = 2;      [self addGestureRecognizer:touch];      [touch release];         //长按压    UILongPressGestureRecognizer *press = [[UILongPressGestureRecognizer alloc]initWithTarget:self action:@selector(longPress:)];    press.minimumPressDuration = 1.0;    [self addGestureRecognizer:press];    [press release];    } 

添加方法longPress

 

1. - (void)longPress:(UILongPressGestureRecognizer *)recognizer {  
2. if (recognizer.state == UIGestureRecognizerStateBegan) {  
3. //   TSTableViewCell *cell = (TSTableViewCell *)recognizer.view;   
4.         [self becomeFirstResponder];  
5.         UIMenuItem *flag = [[UIMenuItem alloc] initWithTitle:@"Flag" action:@selector(flag:)];  
6.         UIMenuItem *approve = [[UIMenuItem alloc] initWithTitle:@"Approve" action:@selector(approve:)];  
7. UIMenuItem *deny = [[UIMenuItem alloc] initWithTitle:@"Deny" action:@selector(deny:)];  
8.           
9.         UIMenuController *menu = [UIMenuController sharedMenuController];  
10. [menu setMenuItems:[NSArray arrayWithObjects:flag, approve, deny, nil]];  
11. [menu setTargetRect:self.frame inView:self.superview];  
12.         [menu setMenuVisible:YES animated:YES];  
13.          NSLog(@"menuItems:%@",menu.menuItems);  
14. }  
15. }  
16.   
17. - (void)flag:(id)sender {  
18. NSLog(@"Cell was flagged");  
19. }  
20.   
21. - (void)approve:(id)sender {  
22. NSLog(@"Cell was approved");  
23. }  
24.   
25. - (void)deny:(id)sender {  
26. NSLog(@"Cell was denied");  
27. }  

- (void)longPress:(UILongPressGestureRecognizer *)recognizer {if (recognizer.state == UIGestureRecognizerStateBegan) {// TSTableViewCell *cell = (TSTableViewCell *)recognizer.view;        [self becomeFirstResponder];        UIMenuItem *flag = [[UIMenuItem alloc] initWithTitle:@"Flag" action:@selector(flag:)];        UIMenuItem *approve = [[UIMenuItem alloc] initWithTitle:@"Approve" action:@selector(approve:)];UIMenuItem *deny = [[UIMenuItem alloc] initWithTitle:@"Deny" action:@selector(deny:)];                UIMenuController *menu = [UIMenuController sharedMenuController];[menu setMenuItems:[NSArray arrayWithObjects:flag, approve, deny, nil]];[menu setTargetRect:self.frame inView:self.superview];        [menu setMenuVisible:YES animated:YES];         NSLog(@"menuItems:%@",menu.menuItems);}}- (void)flag:(id)sender {NSLog(@"Cell was flagged");}- (void)approve:(id)sender {NSLog(@"Cell was approved");}- (void)deny:(id)sender {NSLog(@"Cell was denied");}

修改canPerformAction

 

 

1. -(BOOL)canPerformAction:(SEL)action withSender:(id)sender{    
2. //    return (action == @selector(copy:));     
3.     if (action == @selector(copy:)||action == @selector(flag:)||action == @selector(approve:)||action == @selector(deny:)) {  
4.         return YES;  
5.     }  
6. }  

-(BOOL)canPerformAction:(SEL)action withSender:(id)sender{  //    return (action == @selector(copy:));      if (action == @selector(copy:)||action == @selector(flag:)||action == @selector(approve:)||action == @selector(deny:)) {        return YES;    }}

 

ok。。。效果如图