两个方法的反射

类似于这种写法的反射：

[[PGYGetMAC sendMessage] gotoDownLoad:@"778324728" url:@"https://itunes.apple.com/cn/app/sao-yi-sao-er-wei-ma/id778324728?mt=8"];

这样的话就只需要写一个方法就行，不用写一个类方法.一个实例方法两个方法了

+ (void)cyGotoDownLoad:(NSString *)appID url:(NSString *)url

{

    Class myGetMAC = NSClassFromString(@"PGYGetMAC");

    

    if (myGetMAC)

    {

        id messageInstance = [myGetMAC performSelector:@selector(sendMessage)];

        if (messageInstance) {

            [messageInstance performSelector:@selector(gotoDownLoad:url:) withObject:appID withObject:url];

        }

        else

        {

            NSLog(@"CYPGYGetMAC: mac地址统计失败,sendMessage实例获取失败");

        }

    }

    else

    {

        NSLog(@"CYPGYGetMAC: mac地址统计失败,请添加libPGY_ANALYTICS_INTERNAL.a");

    }

}