比较UIColors或CGColor或CGColorSpace [英] Comparing UIColors or CGColor or CGColorSpace

问题描述

我在比较UIColors时遇到了问题。我有一个图像，我已成功提取用户点击的图像上的颜色。现在我想将这种颜色与其他颜色进行比较，但我得到了一些奇怪的结果。这是我尝试过的：

I'm having an issue comparing UIColors. I have an image, which I have successfully extracted the color on the image at which the user clicked. Now I want to compare that color with other colors, but I'm getting some strange results. Here's what I've tried:

    CGColorRef pixelColor = [[buttonImage colorAtPixel:point] CGColor];
UIColor* color = [UIColor colorWithCGColor:pixelColor];
UIColor* aqua = [UIColor colorWithRed:0.521569 green:0.768627 blue:0.254902 alpha:1];
if (CGColorEqualToColor(color.CGColor, aqua.CGColor)) {
    DLog(@"Apparently, it works");
}
DLog(@"%@", color.CGColor);
DLog(@"%@", aqua.CGColor);

输出：

2011-05-21 19:48:27.144 Coffee[66860:207] -[DescriptorsViewController touchesEnded:withEvent:] <CGColor 0x4d1eb80> [<CGColorSpace 0x4d1a070> (kCGColorSpaceDeviceRGB)] ( 0.521569 0.768627 0.254902 1 )
2011-05-21 19:48:27.145 Coffee[66860:207] -[DescriptorsViewController touchesEnded:withEvent:] <CGColor 0x4d1f750> [<CGColorSpace 0x4d1a070> (kCGColorSpaceDeviceRGB)] ( 0.521569 0.768627 0.254902 1 )

看起来CGColor地址不同，但是CGColorSpaces是一样的，但我无法弄清楚如何比较CGColorSpaces

It looks like the CGColor addresses are different, but the CGColorSpaces are the same, but I can't figure out how to compare the CGColorSpaces

我也试过这个：

CGColorRef pixelColor = [[buttonImage colorAtPixel:point] CGColor];
UIColor* color = [UIColor colorWithCGColor:pixelColor];
UIColor* aqua = [UIColor colorWithRed:0.521569 green:0.768627 blue:0.254902 alpha:1];
if ([color isEqual:aqua]) {
    DLog(@"Apparently, it works");
}
DLog(@"%@", color.CGColor);
DLog(@"%@", aqua.CGColor);

出现同样的愚蠢。

2011-05-21 20:02:49.277 Coffee[67013:207] -[DescriptorsViewController touchesEnded:withEvent:] <CGColor 0x4d3b810> [<CGColorSpace 0x5912010> (kCGColorSpaceDeviceRGB)] ( 0.521569 0.768627 0.254902 1 )
2011-05-21 20:02:49.278 Coffee[67013:207] -[DescriptorsViewController touchesEnded:withEvent:] <CGColor 0x4d3ba20> [<CGColorSpace 0x5912010> (kCGColorSpaceDeviceRGB)] ( 0.521569 0.768627 0.254902 1 )`

推荐答案

对于 CGColor ，您可以使用函数 CGColorEqualToColor ：

For CGColor you can use the function CGColorEqualToColor:

bool CGColorEqualToColor (
   CGColorRef color1,
   CGColorRef color2
);

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