UIMenuController UIPasteboard:复制粘贴详解

• 首先用下面四张图，说明我要实现的功能。【讲一张图片复制到另外一个UIimageView上】

  
  

  实现代码如下：

  view source

  01. -(IBAction)panGestureTop:(UILongPressGestureRecognizer *)longPress

  02. {

  03.  

  04. UIMenuItem * itemPase = [[UIMenuItem alloc] initWithTitle:@"复制" action:@selector(copyimage)];

  05. UIMenuItem * itemTrans = [[UIMenuItem alloc] initWithTitle:@"转发" action:@selector(trans)];

  06. UIMenuItem * itemCollect = [[UIMenuItem alloc] initWithTitle:@"收藏" action:@selector(collect)];

  07. UIMenuItem * itemJoin = [[UIMenuItem alloc] initWithTitle:@"加入" action:@selector(join)];

  08.  

  09. UIMenuController * menuController = [UIMenuController sharedMenuController];

  10. [menuController setMenuItems: @[itemPase,itemCollect,itemTrans,itemJoin]];

  11.  

  12. CGPoint location = [longPress locationInView:[longPress view]];

  13. CGRect menuLocation = CGRectMake(location.x, location.y, 0, 0);

  14. [menuController setTargetRect:menuLocation inView:[longPress view]];

  15. menuController.arrowDirection = UIMenuControllerArrowDown;

  16.  

  17. [menuController setMenuVisible:YES animated:YES];

  18.  

  19. }

  20. -(BOOL)canBecomeFirstResponder

  21. {

  22. return YES;

  23. }

  24.  

  25. -(void)copyimage

  26. {

  27.  

  28. UIPasteboard * pasterBoard = [UIPasteboard pasteboardWithName:@"com.test.image" create:YES];

  29. pasterBoard.image = [self.topImgView image];

  30.  

  31. }

  32. -(IBAction)panGestureBottom:(UILongPressGestureRecognizer *)longPress

  33. {

  34. UIMenuItem * itemPase = [[UIMenuItem alloc] initWithTitle:@"粘贴" action:@selector(pase)];

  35.  

  36. UIMenuController * menuController = [UIMenuController sharedMenuController];

  37. [menuController setMenuItems: @[itemPase]];

  38.  

  39. CGPoint location = [longPress locationInView:[longPress view]];

  40. CGRect menuLocation = CGRectMake(location.x, location.y, 0, 0);

  41. [menuController setTargetRect:menuLocation inView:[longPress view]];

  42. menuController.arrowDirection = UIMenuControllerArrowDown;

  43.  

  44. [menuController setMenuVisible:YES animated:YES];

  45.  

  46. }

  47. -(void)pase

  48. {

  49. UIPasteboard * pasterBoard = [UIPasteboard pasteboardWithName:@"com.test.image" create:NO];

  50. self.bottomImgView.image = pasterBoard.image;

  51.  

  52. }
  
  当操作的时候，我们需要把当前的UIViewController变成第一响应者。

  复制相当于copy了一份，加入我在复制过图片之后，粘贴图片之前，把原来的那个image删除掉，则依然可以进行粘贴。

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