iphone 如何显示菜单并且实现copy操作

                                                 iphone 如何显示菜单并且实现copy操作

 

1。首先要显示  菜单

 

      //首先让自己变成第一响应[self becomeFirstResponder];//获得menu ControllerUIMenuController * copyMenuController=[UIMenuController sharedMenuController];//设置显示位置[copyMenuController setTargetRect:CGRectMake(15, 15, 100, 50) inView:self.view];//显示[copyMenuController setMenuVisible:YES animated:YES]; 

 

2。然后要让自己这个ViewController能够变成 firstResponder

 

响应：- (BOOL) canBecomeFirstResponder

 

     - (BOOL) canBecomeFirstResponder{return YES;} 

 

3。响应：- (BOOL) canPerformAction:(SEL)action withSender:(id)sender

 

    - (BOOL) canPerformAction:(SEL)action withSender:(id)sender{BOOL retValue = NO; if (action == @selector(copy:)) { NSLog(@"canPerformAction"); retValue = YES; }else if (action == @selector(paste:)){ NSLog(@"canPerformAction"); retValue = NO; }else { retValue = [super canPerformAction:action withSender:sender]; } return retValue;} 

 

  4。执行拷贝操作

 

   //执行拷贝操作- (void)copy:(id)sender{ UIPasteboard *gpBoard=[UIPasteboard generalPasteboard]; if (gpBoard) { NSString *copytext=@"text"; [gpBoard setString:copytext]; }} 

   上面的代码，就是将 “text”这个字符串放到了系统粘贴板中。