IOS UIWebView Modify User-agent

WebView does not provide an interface for setting up user-agent, whether it is setting the request to load or setting the request in delegate, the test is not valid. As follows:

Programme one:

[OBJC]View Plaincopy

1. Nsmutableurlrequest *request = [[Nsmutableurlrequest alloc] Initwithurl:url];
2. [Request AddValue:@ "jiecao/2.4.7" Forhttpheaderfield:@ "User-agent"];
3. [self. WebView Loadrequest:request];

Invalid!!!

Scenario Two:

[OBJC]View Plaincopy

1. #pragma  mark -  webview delegate  
2.   
3. -  ( bool) WebView: (uiwebview *) webview  Shouldstartloadwithrequest: (nsurlrequest *) request  Navigationtype: (Uiwebviewnavigationtype) navigationtype {  
4.     nsmutableurlrequest *req =  (nsmutableurlrequest *) request;  
5.      [req addvalue:@ "jiecao/2.4.7"   Forhttpheaderfield:@ "User-agent"];  
6. }   

Invalid!!!

My requirement is not only to be able to change user-agent, but also to keep WebView the original user-agent information, that is, I need to append information on it. The answers are collected on StackOverflow and the final summary of the solutions is as follows:

At startup, for example, add the following code to the Appdelegate:

[OBJC]View Plaincopy

2. Get the original user-agent of WebView
4. UIWebView *webview = [[UIWebView alloc] Initwithframe:cgrectzero];
6. NSString *oldagent = [WebView stringbyevaluatingjavascriptfromstring:@ "Navigator.useragent"];
8. NSLog (@ "Old agent:%@", oldagent);
12. add my info to the new agent
14. NSString *newagent = [oldagent stringbyappendingstring:@ "jiecao/2.4.7 Ch_appstore"];
16. NSLog (@ "New agent:%@", newagent);
20. Regist the new agent
22. Nsdictionary *dictionnary = [[Nsdictionary alloc] initwithobjectsandkeys:newagent, @ "useragent", Nil  Nil];
24. [[Nsuserdefaults Standarduserdefaults] registerdefaults:dictionnary];

In this way, WebView at the request of the user-agent is we set this, if you need to change the user-agent in webview use process, you need to modify the user-agent in this manner, and then re-instantiate a webview.

Reference:

http://stackoverflow.com/questions/478387/change-user-agent-in-uiwebview-iphone-sdk/23654363#23654363

IOS UIWebView Modify User-agent