How to focus textfield on EditorWindow load with editor script

Questions & Answers
1

I use following code:

public class TestTextFieldFocusOnStartup : EW
{
    [MenuItem("Test/Text Field Focus On Startup")]
    public static void St()
    {
        var w =  GetWindow<TestTextFieldFocusOnStartup>();
        w.Show();
    }

    private void OnGUI()
    {
        EditorGUILayout.TextField("");
    }
}

but I don’t know how to get TextField object and focus it on window show

2

update 2017-9-16: I find use EditorGUI.FocusTextInControl instead FocusControl will fix this question

public class TestTextFieldFocusOnStartup : EW
{
    [MenuItem("Test/Text Field Focus On Startup")]
    public static void St()
    {
        var w = GetWindow<TestTextFieldFocusOnStartup>();
        w.Show();
    }

    private bool focused;

    private void OnGUI()
    {
        GUI.SetNextControlName("prpr");
        var text = EditorGUILayout.TextField("a text");
        if (!focused)
        {
            EditorGUI.FocusTextInControl("prpr");
            focused = true;
        }
        EditorGUILayout.TextField("");
    }
}

update 2017-9-15:my old answer code will cause second open editorwindow focus input but cannot type, so I improve my code:

public class TestTextFieldFocusOnStartup : EW
{
    [MenuItem("Test/Text Field Focus On Startup")]
    public static void St()
    {
        var w = GetWindow<TestTextFieldFocusOnStartup>();
        w.Show();
    }

    private bool focused;

    private void OnGUI()
    {
        GUI.SetNextControlName("prpr");
        EditorGUILayout.TextField("");
        if (!focused)
        {
            GUI.FocusControl("prpr");
           var te = (TextEditor)GUIUtility.GetStateObject(typeof(TextEditor), GUIUtility.keyboardControl);
            te.cursorIndex = 1;
            focused = true;
        }
        EditorGUILayout.TextField("");
    }
}

old answer:

I find the solution

public class TestTextFieldFocusOnStartup : EW
{
    [MenuItem("Test/Text Field Focus On Startup")]
    public static void St()
    {
        var w =  GetWindow<TestTextFieldFocusOnStartup>();
        w.Show();
    }

    private void OnGUI()
    {
        GUI.SetNextControlName("prpr");
        EditorGUILayout.TextField("");
        GUI.FocusControl("prpr");
    }
}