Retina 显示器 VS 正常显示器色差

我正在设计一个自定义按钮，它需要我在 UIImageView 之上覆盖一个 UIButton.UIImageView 使用 [UIImage stretchableImageWithLeftCapWidth:topCapHeight:] 图像，UIButton 具有带有图案图像的背景色 [UIColor colorWithPatternImage:[UIImage imageNamed:@"buttonPattern.png"]]

I am designing a custom button with that requires me to overlay a UIButton on top of a UIImageView. The UIImageView uses a [UIImage stretchableImageWithLeftCapWidth:topCapHeight:] image and the UIButton has a background color with a pattern image [UIColor colorWithPatternImage:[UIImage imageNamed:@"buttonPattern.png"]]

我面临的问题是，在 iPhone 4 上，来自 UIButton 和 UIImageView 的图像看起来颜色略有不同，尽管它们应该匹配.在 iPhone 3GS 上测试同样的东西，结果正常，没有色差.

The problem I am facing is that on iPhone 4, the images from the UIButton and the UIImageView appear to have slightly different colors although they should match. Testing the same thing on an iPhone 3GS shows normal results without the color difference.

这张图片显示了不同之处:

This image shows the difference:

如您所见，它在 3GS 上看起来不错.在视网膜显示屏上，您可以清楚地看到颜色的差异.我什至尝试在视网膜显示器上使用低分辨率图像(来自 3GS)，颜色仍然显示不同.这是视网膜显示设备中的错误吗?有没有人遇到过这个问题?

as you can see it looks fine on the 3GS. On the retina display you can clearly see the difference in color. I even tried using the low res images (from the 3GS) on the retina display, the colors were still showing differently. is this a bug in retina display devices? has anyone faced this issue before?