如何在 UIView 中使 UIbutton 可拖动？答案

【问题标题】：how to make UIbutton draggable within UIView?如何在 UIView 中使 UIbutton 可拖动？
【发布时间】：2010-12-11 11:25:20
【问题描述】：

我需要在仪表板中拖放按钮，我可以使用以下代码拖放按钮

- (void)viewDidLoad {
      [super viewDidLoad];
     [eventButton addTarget:self action:@selector(draggedOut:withEvent:)forControlEvents:UIControlEventTouchDragOutside |UIControlEventTouchDragInside];
  }

- (void) draggedOut: (UIControl *) c withEvent: (UIEvent *) ev {
       CGPoint point = [[[ev allTouches] anyObject] locationInView:self.view];
    if(point.y > 22 && point.y <300)
            c.center = CGPointMake(237, point.y - c.bounds.size.height/2 -5);
  }

但我需要在拖放时也需要更改按钮的位置

注意：我只为一个按钮编写了代码

请帮我解答我的问题

【问题讨论】：

标签： uiview drag-and-drop uibutton

【解决方案1】：

- (void)viewDidLoad {
  [super viewDidLoad];
  [eventButton addTarget:self action:@selector(dragOut:withEvent:)forControlEvents:UIControlEventTouchDragOutside |UIControlEventTouchDragInside];
   }

-(IBAction)dragOut: (id)sender withEvent: (UIEvent *) event {
 UIButton *selected = (UIButton *)sender;
 selected.center = [[[event allTouches] anyObject] locationInView:self.view];
 }

【讨论】：

【解决方案2】：

使用 UIButton 的 UIControlEventTouchDragInside 和 UIControlEventTouchUpInside 事件

// add drag listener
[button addTarget:self action:@selector(wasDragged:withEvent:) forControlEvents:UIControlEventTouchDragInside];
// add tap listener
[button addTarget:self action:@selector(wasTapped:) forControlEvents:UIControlEventTouchUpInside];

你可以使用hbdraggablebutton控制..

【讨论】：