如何在iOS中使用边缘插图？ [英] How to use edge insets in iOS?

问题描述

如何使用边缘插图使图像适合按钮内？我不确定UIEdgeInsetsMake（）中的参数要使用什么值。我能以某种方式使用按钮的宽度和高度来设置它们吗？

How would I use edge insets to make an image fit inside a button? I'm not sure what values to use for the arguments in UIEdgeInsetsMake(). Could I somehow use the button's width and height to set them?

我希望按钮在未被选择时只是图像。我了解如何执行未选中时部分，但是我不知道如何使用边缘插图，也不知道该术语的确切含义。

I want the button to just be an image when not selected. I understand how to do the "when not selected" part, but I have no idea how to use edge insets nor what the term exactly means.

我在时刻：

image = [image resizableImageWithCapInsets:UIEdgeInsetsMake(<#CGFloat top#>, <#CGFloat left#>, <#CGFloat bottom#>, <#CGFloat right#>)];

[button setImage:image forState:!UIControlStateSelected];

此外，一旦按钮被选中，我该如何恢复为不使用图像？

Also, how would I revert to using no image once the button becomes selected?

推荐答案

我想我明白你的意思。如果我误解了您的问题，请告诉我。

I think I am getting what you are saying. Please let me know if I am misunderstanding your question.

说您有 myImage.png 。初始化如下：

[button setImage:[UIImage imageNamed:@"myImage.png"] forState:UIControlStateNormal];

然后，假设您已经为Interface Builder中的按钮连接了IBAction：

Then, assuming you have connected an IBAction for the button in Interface Builder:

- (IBAction)myButtonWasPressed:(UIButton *)sender
{
    [sender setImage:nil];
}

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