iOS 获取纯色图片方法

+ (UIImage *)imageWithColor:(UIColor *)color size:(CGSize)size {    CGRect rect = CGRectMake(0, 0, size.width, size.height);    UIGraphicsBeginImageContext(rect.size);    CGContextRef context = UIGraphicsGetCurrentContext();    CGContextSetFillColorWithColor(context, [color CGColor]);    CGContextFillRect(context, rect);    UIImage *image = UIGraphicsGetImageFromCurrentImageContext();    UIGraphicsEndImageContext();    return image;}