TouchScreenKeyboard Should Close When GUI.TextField Loses Focus

If anyone can tell me how do do this I will be most appreciative. I am using the following code:

 void OnGUI() {
         
     GUI.SetNextControlName(name);
     textString = GUI.TextField(myRect, textString, 25);
 
     if(GUI.GetNameOfFocusedControl() == name)
         Debug.Log("I have you now");
     else
         Debug.Log("Negative, it only impacted on the surface.");
 }

What do I need to add to get the keyboard to close when the textField loses focus? As it is when the textfield loses focus the keyboard is still visible and edits the previously focused textField when I type.

I am testing this on an iPad (first gen).