iOS设置UIWebView的UserAgent

　　接入第三方时，别人又需求,要求传入我们的信息。

// 获取 iOS 默认的 UserAgent，可以很巧妙地创建一个空的UIWebView来获取：NSString *userAgent = [[[UIWebView alloc] init] stringByEvaluatingJavaScriptFromString:@"navigator.userAgent"];// 获取App名称，我的App有本地化支持，所以是如下的写法NSString *customUserAgent = [userAgent stringByAppendingFormat:@" %@", @"86wx/1.0.0"];[[NSUserDefaults standardUserDefaults] registerDefaults:@{@"UserAgent":customUserAgent}];

- (void)webViewDidFinishLoad:(UIWebView *)webView
{// 打印信息NSLog(@"UserAgent = %@", [webView stringByEvaluatingJavaScriptFromString:@"navigator.userAgent"]);
}