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iOS調用WebView私有API的方法

   - (void)modifyUA

  {

  id webView = [uiWebViewInstance valueForKeyPath:@"_internal.browserView._webView"];

  [webView performSelector:@selector(setCustomUserAgent:) withObject:@"Mozilla/5.0 (Windows; U; Windows NT 5.2) AppleWebKit/525.13 (KHTML, like Gecko) Chrome/0.2.149.27 Safari/525.13 "];

  }

  這是示例修改User Agent。獲取WebView使用的是Key-Value Coding的方法

  為了更安全地通過apple的審查,可以這樣:

  - (void)modifyUA

  {

  NSString *path = [@"_internal.browser" stringByAppendingString:@"View._webView"];

  id webView = [g_webView valueForKeyPath:path];

  NSString *selString = [@"setCustom" stringByAppendingString:@"UserAgent:"];

  SEL sel = NSSelectorFromString(selString);

  [webView performSelector:sel withObject:@"Mozilla/5.0 (Windows; U; Windows NT 5.2) AppleWebKit/525.13 (KHTML, like Gecko) Chrome/0.2.149.27 Safari/525.13 "];

  }

  把字符串分割再合成就ok

  出處:http://blog.csdn.net/hursing

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