title: Show keyboard in contenteditable UIWebView programmatically
body: <p>My UIWebView loads a contenteditable html content. I want to let the UIWebView get focused and show keyboard in the UIWebView.</p>
  
  <p>I use <code>[self.webview becomeFirstResponder]</code>, but it doesn't work. Is there any work around method?</p>
  
  <p>Thanks.</p>