ios - 如何使 UIButton 可拖动但不触发点击事件

Question

我一般都是用这个方法来实现UIButton的可移动；

[button addTarget:self action:@selector(dragMoving:withEvent:) forControlEvents:UIControlEventTouchDragInside];

但是它会同时触发touchUpInside事件，我需要touchUpInside事件做一些其他事情。

那么有人知道如何避免这种情况吗？

非常感谢；

使用下面这些代码来解决它；

  [button addTarget:self action:@selector(touchDown:withEvent:) forControlEvents:UIControlEventTouchDown];

    [button addTarget:self action:@selector(touchDragInside:withEvent:) forControlEvents:UIControlEventTouchDragInside];
        [button addTarget:self action:@selector(touchUpInside:withEvent:) forControlEvents:UIControlEventTouchUpInside];

    - (void) touchUpInside :(UIControl*)c withEvent:ev{
    NSLog(@"touch Up inside");
    if (count) {
        NSLog(@"here I can do something about clicking event");
    }
}

    - (void) touchDown:(UIControl*)c withEvent:ev{
    NSLog(@"touch Down");
    count = YES;
}

    -(void) touchDragInside:(UIControl*)c withEvent:ev{
    NSLog(@"touch drag inside");
    c.center = [[[ev allTouches] anyObject] locationInView:self.view];
    count = NO;
}

Answer 1

实际上，实现此目的的最佳方法是使用 UIPanGestureRecognizer 并将其添加到按钮。它可以很好地处理拖动，您也可以点击它而无需执行任何其他操作。