根据颜色获取R,G,B值

矩阵科技

于 2019-10-03 20:21:22 发布

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文章标签：根据颜色获取RGB

本文链接：https://blog.youkuaiyun.com/qq_38810052/article/details/102015202

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根据颜色获取R,G,B值

- (void)getRGBComponents:(CGFloat [3])components forColor:(UIColor *)color {
    
    CGColorSpaceRef rgbColorSpace = CGColorSpaceCreateDeviceRGB();
    unsigned char resultingPixel[4];
    CGContextRef context = CGBitmapContextCreate(&resultingPixel,1, 1,8, 4,rgbColorSpace,kCGImageAlphaNoneSkipLast);
    CGContextSetFillColorWithColor(context, [color CGColor]);
    CGContextFillRect(context, CGRectMake(0, 0, 1, 1));
    CGContextRelease(context);
    CGColorSpaceRelease(rgbColorSpace);
    for (int component = 0; component < 3; component++)
    {
        components[component] = resultingPixel[component] / 255.0f;
    }
}