• UIMenuController的使用，对UILabel拷贝以及定制菜单 .

    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:)

    [cpp] view plaincopyprint?
    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

     

     

    [cpp] view plaincopyprint?
    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

     

    [cpp] view plaincopyprint?
    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

     

    [cpp] view plaincopyprint?
    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
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  • 原文地址：https://www.cnblogs.com/lzjsky/p/2966249.html
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