iphone - 如何使隐形按钮后面的图像看起来像是被按下了？

Question

嗨，我有几个图像被一个不可见的按钮覆盖。当我按下隐形按钮时，有没有办法让它看起来像被按下的图像？谢谢！

Answer 1

您可以将图像直接放在按钮上，不需要单独的UIImageView.

[button setBackgroundImage:image forState:UIControlStateNormal];
[button setBackgroundImage:image forState:UIControlStateSelected];

还有几个UIControlState常数。

看看文档：

http://developer.apple.com/library/ios/#DOCUMENTATION/UIKit/Reference/UIButton_Class/UIButton/UIButton.html

http://developer.apple.com/library/ios/#DOCUMENTATION/UIKit/Reference/UIControl_Class/Reference/Reference.html#//apple_ref/c/tdef/UIControlState