问题描述

如何在 iOS 5 中更改 UIWebView 的用户代理?

How can I change the user-agent of UIWebView in iOS 5?

到目前为止我做了什么:使用委托回调，拦截 NSURLRequest，创建一个新的 url 请求并将它的用户代理设置为我想要的任何内容，然后下载数据并使用loadData:MIMEType:...."重新加载 UIWebView.

What I have done so far: Using the delegate call back, intercept the NSURLRequest, create a new url request and set it's user-agent as whatever I want, then download the data and reload the UIWebView with "loadData:MIMEType:....".

问题:这会导致无限递归，我在其中加载数据，这会回调委托，实习生会调用委托....

Problem: This causes infinite recursion, where I load the data, which calls the delegate back, which intern calls the delegate....

这是委托方法:

- (BOOL)webView:(UIWebView *)aWebView shouldStartLoadWithRequest:(NSURLRequest *)request navigationType:(UIWebViewNavigationType)navigationType {



    dispatch_async(kBgQueue, ^{
        NSURLResponse *response = nil;
        NSMutableURLRequest *newRequest = [NSMutableURLRequest requestWithURL:[request URL]];
        NSDictionary *headers = [NSDictionary dictionaryWithObject:
                                 @"custom_test_agent" forKey:@"User-Agent"];
        [newRequest setAllHTTPHeaderFields:headers];
        [self setCurrentReqest:newRequest];
        NSData *data = [NSURLConnection sendSynchronousRequest:newRequest 
                                             returningResponse:&response 
                                                         error:nil];
        dispatch_sync(dispatch_get_main_queue(), ^{
            [webView loadData:data 
                     MIMEType:[response MIMEType] 
             textEncodingName:[response textEncodingName] 
                      baseURL:[request URL]];
        });
    });

    return YES;
}

推荐答案

通过在应用启动时运行一次此代码来更改UserAgent"默认值:

Change the "UserAgent" default value by running this code once when your app starts:

NSDictionary *dictionary = [NSDictionary dictionaryWithObjectsAndKeys:@"Your user agent", @"UserAgent", nil];
[[NSUserDefaults standardUserDefaults] registerDefaults:dictionary];  

我使用它取得了巨大的成功，但想添加更多细节.要获取用户代理，您可以启用开发人员"菜单，设置用户代理，然后连接到此站点以将其打印出来:WhatsMyAgent.同样，您可以使用任何类型的移动设备进行连接，也可以通过这种方式进行连接.顺便说一句，这在 iOS7+ 中仍然可以正常工作

I have used this with great success, but want to add additional details. To get a user agent, you can enable the "Developer" menu, set the user agent, and then connect to this site to get it printed out for you: WhatsMyAgent. Likewise you can connect using any kind of mobile device, and get it that way too. BTW this is still working just fine in iOS7+

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