添加參數到瀏覽器 UserAgent

   NSString *userAgent = [[[UIWebView alloc] init] stringByEvaluatingJavaScriptFromString:@"navigator.userAgent"];
    NSString *customUserAgent = [userAgent stringByAppendingString:[NSString stringWithFormat:@" %@",kUserTokenInMemory]];
    
    [[NSUserDefaults standardUserDefaults] registerDefaults:@{@"UserAgent":customUserAgent}];