使用TouchDown事件来防止触发TouchUpInside事件

Question

I've got some UIButtons which all have TouchUpInside events. A few of them also have TouchDown events. In certain circumstances I would like the code in the TouchDown event to prevent the TouchUpInside event from firing.

How can I short-circuit that event series?

Answer 1

您可以在touch down方法中设置一个标志，然后在touch up inside方法中检查该标志的状态，以决定是否执行其常规操作。