自定义粘贴板-陈鹏

接下来我们做一个可复制的UIImageView，创建一个新的viewController，放两个imageView，默认显示不同的图：

-(BOOL)canPerformAction:(SEL)action withSender:(id)sender{  
    return (action == @selector(copy:) || action == @selector(paste:));  
} //标识可运行的方法

-(void)copy:(id)sender{  
    UIPasteboard *pboard = [UIPasteboard generalPasteboard];  
    pboard.image = self.image;  
} //拷贝的方法

-(void)paste:(id)sender{  
    UIPasteboard *pboard = [UIPasteboard generalPasteboard];  
    self.image = pboard.image;  
}//粘贴的方法

 

//自定义粘贴显示菜单

为了方便实用，我给cell添加了长按事件，看代码---
UILongPressGestureRecognizer *recognizer = [[UILongPressGestureRecognizer alloc] initWithTarget:self action:@selector(longPress:)];
    [cell addGestureRecognizer:recognizer];
好，事件加上了，剩下的点击就是实现自定义剪贴板了，上代码：
- (void)longPress:(UILongPressGestureRecognizer *)recognizer{
       if (recognizer.state == UIGestureRecognizerStateBegan) {
             CopyCell *cell = (CopyCell *)recognizer.view;
             [cell 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]];
        NSLog(@".....%@",NSStringFromCGRect(cell.frame));
        [menu setTargetRect:cell.frame
inView:cell.superview];


        [menu setMenuVisible:YES
animated:YES];
      }
}


通过上面这段代码，自定义剪贴板成功搞定，运行，你猛然会发现，操，怎么剪贴板没有出来，我猜你已经想到为什么了，因为
- (BOOL)canBecomeFirstResponder{
    return YES;
}


这么重要的一句话没有加，OK，下面就是你所要使用的方法了
 
- (void)flag:(id)sender {


    NSLog(@"Cell was flagged");


}
- (void)approve:(id)sender {


    NSLog(@"Cell was approved");
}


- (void)deny:(id)sender {


    NSLog(@"Cell was denied");


}