为 UIButton 拉伸背景图像

问题描述

我得到了比我的 UIButton 更短的纹理.

I got texture, which really shorter, than my UIButton.

我得到了这个纹理:

我应该创建这个按钮:

我应该如何拉伸(而不是平铺)这种纹理?横向拉伸

How should i stretch (not tile), this texture? Stretching in horizontal direction

谢谢

推荐答案

从您提供的示例图像中，我很确定您正在寻找 UIImage 的 resizableImageWithCapInsets:

From the example images you provided I'm pretty sure you're looking for UIImage's resizableImageWithCapInsets:

UIImage *originalImage = [UIImage imageNamed:@"myImage.png"];
UIEdgeInsets insets = UIEdgeInsetsMake(top, left, bottom, right);
UIImage *stretchableImage = [originalImage resizableImageWithCapInsets:insets];
[myButton setBackgroundImage:stretchableImage forState:UIControlStateNormal];
// the image will be stretched to fill the button, if you resize it.

UIEdgeInsets 结构中的值决定了您不想被拉伸的边距.你的左值和右值可能大约是这个宽度:

The values in the UIEdgeInsets struct determine the margins you don't want to be stretched. Your left and right values could be about this wide:

顶部和底部的值可以是 0(如果您不想垂直调整按钮的大小)，也可以是总高度的一半.

The top and bottom values can be either 0 (if you don't want to resize the button vertically), or probably half of the total height.

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