ios - 从 UITapGestureRecognizer 中删除目标

Question

我已将操作作为匿名方法添加到我的手势识别器

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

如何删除目标？需要 UIGestureRecognizer.Token。

Answer 1

RTFM这里是正确的:

An instance of this class is returned when you invoke the UIGestureRecognizer's UIGestureRecognizer.AddTarget method. The AddTarget returns this token as a mechanism for later unsubscribing this particular action from the recognizer using the UIGestureRecognizer.RemoveTarget method.

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

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