UIAlertView customization, how to manage standart buttons?

I customize UIAlertV开发者_如何学Ciew and add UITextView and UITextfield, but I need to set buttons (I add buttons in a standart init) to bottom of UIAlertView view. While init my UIAlertView I add message:@"\n\n\n\n\n" this give me 5 strings but when I add another one UIAlertView show it's standart textview. Take a look on image to make it more clear to understand what i have and what i need.

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Use this Example ....

 // Create Alert
    UIAlertView* av = [UIAlertView new];
    av.title = @"Find";
    // Add Buttons
    [av addButtonWithTitle:@"Cancel"];
    [av addButtonWithTitle:@"Find & Bring"];
    [av addButtonWithTitle:@"Find & Go"];
    [av addButtonWithTitle:@"Go to Next"];
    // Make Space for Text View
    av.message = @"\n";
    // Have Alert View create its view heirarchy, set its frame and begin bounce animation
    [av show];
    // Adjust the frame
    CGRect frame = av.frame;
    frame.origin.y -= 100.0f;
    av.frame = frame;
    // Add Text Field
    UITextField* text = [[UITextField alloc] initWithFrame:CGRectMake(20.0, 45.0, 245.0, 25.0)];
    text.borderStyle = UITextBorderStyleRoundedRect;
    [av addSubview:text];
    [text becomeFirstResponder];