iOS 根据颜色返回图片

颜色－》图片

UIGraphicsBeginImageContext(CGSizeMake(1, 1));

CGContextRef context = UIGraphicsGetCurrentContext();

CGContextSetFillColorWithColor(context, color.CGColor);

CGContextFillRect(context, CGRectMake(0, 0, 1, 1));

UIImage *result =  UIGraphicsGetImageFromCurrentImageContext();

UIGraphicsEndImageContext();