IOS 小技能 通过颜色制作图片

//通过颜色制作图片
- (UIImage *)imageWithColor:(UIColor *)color
{
    CGRect rect = CGRectMake(0.0f,
0.0f, 1.0f, 1.0f);
    UIGraphicsBeginImageContext(rect.size);
    CGContextRef context =
UIGraphicsGetCurrentContext();
    
    CGContextSetFillColorWithColor(context, [color
CGColor]);
    CGContextFillRect(context, rect);
    
    UIImage *image =
UIGraphicsGetImageFromCurrentImageContext();
    UIGraphicsEndImageContext();
    return image;
}