ios - 按钮点击事件不触发

Question

目前，我正在使用一个需要单击按钮的 UI 当按钮 alpha 为 1 时，当我将其更改为 0 时，它工作得很好 我无法获得按钮触摸事件？有什么理由吗？

Answer 1

来自apple documentation :

To hide a view visually, you can either set its hidden property to YES or change its alpha property to 0.0. A hidden view does not receive touch events from the system. However, hidden views do participate in autoresizing and other layout operations associated with the view hierarchy. Thus, hiding a view is often a convenient alternative to removing views from your view hierarchy, especially if you plan to show the views again at some point soon.