可拉伸图像拉伸部分宽于1px
我想创建一个 UIButton，它使用可拉伸图像作为背景图像，这样我就可以轻松地调整按钮的大小以适应不同的标签等。
所以我创建了以下工作正常的代码：
UIImage *bgImage = [[UIImage imageNamed:@"Button-Template.png"]stretchableImageWithLeftCapWidth:2 topCapHeight:2];
UIButton *loginButton = [UIButton buttonWithType:UIButtonTypeCustom];
loginButton.frame = CGRectMake(180, 280, 112, 40);
[loginButton setBackgroundImage:bgImage forState:UIControlStateNormal];
// some more stuff
现在这里有一个问题：iPhone SDK 假设图像的可拉伸部分的宽度恰好是一个像素，这在我的图像中不是这种情况，因为我想创建一个图案，这需要每两个像素重复一次（因此 2 个像素是一个图案单位）。我在文档中没有找到是否可以改变可拉伸部分宽度的值（在我的例子中是 2 而不是 1）的信息，有人知道如何做到这一点或者我如何通过解决方法实现我的目标？现在我自己写拉伸部分似乎有点牵强（尽管我可能不得不回到这一点）。
谢谢！
I would like to create a UIButton which uses a stretchable image as Background image such as that I can easily resize the button for different labels etc.
So I created the following code which works fine:
UIImage *bgImage = [[UIImage imageNamed:@"Button-Template.png"]stretchableImageWithLeftCapWidth:2 topCapHeight:2];
UIButton *loginButton = [UIButton buttonWithType:UIButtonTypeCustom];
loginButton.frame = CGRectMake(180, 280, 112, 40);
[loginButton setBackgroundImage:bgImage forState:UIControlStateNormal];
// some more stuff
Now here is the catch: The iPhone SDK assumes that the strechable part of the image is exactly one pixel in width, which is not the case in my image as I want to create a pattern, which requires a repetition every two pixels (so 2 Pixels are one pattern unit). I have found no information in the docs whether it is possible to alter the value of the strechable part width (in my case 2 instead of 1), does anybody know how to do this or how I could achieve my goal with a workaround? Writing the stretching part on my own seems a little far fetched right now (though I might have to get back to this).
Thanks!
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从 iOS 5.0 开始，您可以使用 ressizedImageWithCapInsets：
检查 UIImage 类参考
但此方法仅适用于 iOS >= 5.0 设备，因此可以是
暂时拒绝。
From iOS 5.0 on you could use resizableImageWithCapInsets:
Check UIImage Class Reference
But this method only works on iOS >= 5.0 devices, so that can be a
turn down for now.
没有使用 2 像素作为拉伸宽度的 API。您必须在自定义视图中自行实现此行为，或使用具有特定宽度的图像。
There is no API for using 2 pixels as the stretch width. You'll have to implement this behaviour yourself in a custom view, or use an image with a specific width.