RemoveTarget来自UITapGestureRecognizer

Question

我在手势识别器中添加了一个作为匿名方法的操作

UITapGestureRecognizer tapGesture = new UITapGestureRecognizer ();
tapGesture.AddTarget (() => HandleTap (tapGesture));

如何删除目标?需要UIGestureRecognizer.Token。

Answer 1

RTFM在这里是正确的：

当您调用UIGestureRecognizer的UIGestureRecognizer.AddTarget方法时，将返回该类的一个实例。AddTarget返回此令牌作为以后使用UIGestureRecognizer.RemoveTarget方法从识别器取消此特定操作的机制。

UIGestureRecognizer.Token token = tapGesture.AddTarget (() => HandleTap (tapGesture));

if (token != null) {
    tapGesture.RemoveTarget (token);
}