带标签的按钮

问题描述

如何获得带有指定标签的按钮

How do I get a button with the a specifyed tag

id 喜欢然后将其转换为 UIButton，并更改 alpha

id like to then cast it to a UIButton, and change the alpha

推荐答案

 UIView* view = [theViewContainingThatButton viewWithTag:tag];
 view.alpha = 0.5;

您无需将视图转换为 UIButton 即可更改其 alpha.但如果确实需要，您可以添加 (UIButton*) 演员表.

You don't need to cast the view to a UIButton to change its alpha. But you can add a (UIButton*) cast if really needed.

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