根据颜色和尺寸生成Image

+ (UIImage *)p_w_picpathWithColor:(UIColor *)color size:(CGSize)size

{

    @autoreleasepool {

        CGRect rect = CGRectMake(0, 0, size.width, size.height);

        UIGraphicsBeginImageContext(rect.size);

        CGContextRef context = UIGraphicsGetCurrentContext();

        CGContextSetFillColorWithColor(context, color.CGColor);

        CGContextFillRect(context, rect);

        UIImage *p_w_picpath = UIGraphicsGetImageFromCurrentImageContext();

        UIGraphicsEndImageContext();

        return p_w_picpath;

    }

}