Question

我需要将按钮拖放到仪表板上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);
  }

但我需要拖放时我也需要改变按钮的位置

注意：我只为一个按钮编写了代码

请帮助我解决我的问题

Answer 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];
 }

Answer 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];

您可以使用hbdraggablebutton控件..

如何在UIView中使UI按钮可拖动？

2 个答案: