点击故事板按钮时的不同图像 [英] Different image when button from storyboard tapped

问题描述

我有一个按钮，我想在高亮状态下使用不同的背景图像，通常我会使用类似

I have a button that I want to use a different background image when in highlighted state, normally I would use something like

[buttonObject setBackgroundImage:[UIImage imageNamed:@"buttonDown.png"] 
                        forState:UIControlStateHighlighted];

但按钮位于.storyboard文件中，而不是代码。

什么我应该在这种情况下使用吗？

But the button is in a .storyboard file, not code.
What should I use in this situation?

推荐答案

您也可以通过从下拉菜单中选择状态来为IB中的不同状态设置不同的属性：

You can set up different properties for different states in IB too, by selecting the state from the drop down menu:

如果你想在代码中这样做，你必须设置一个插座并在 awakeFromNib 中设置图像。

If you want to do it in code, you have to set up an outlet and set the images in awakeFromNib.

@property (nonatomic, weak) IBOutlet UIButton *button;

要连接插座，您可以 Ctrl -drag从按钮到您的文件所有者（可能是视图控制器）并选择上面定义的插座。

To connect the outlet, you Ctrl-drag from the button to your File Owner (probably a view controller) and select the outlet defined above.

然后您可以访问代码中的按钮：

Then you can access the button in your code:

- (void)awakeFromNib {
    [button setBackgroundImage:[UIImage imageNamed:@"buttonDown.png"] 
                      forState:UIControlStateHighlighted];
}

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