Putting a UIView or UIWindow above Statusbar

Question

My goal is to draw an invisible button above the status bar on the top of my iPhone app (dimension 320*20 pixels).

No matter what I try, something is buggy:

1. For example, I tried to create a new view. When I want to place the view on the top of my app, it always disappears behind the status bar instead of being in front of it!

2. I found another great idea on Stackoverflow: Add UIView Above All Other Views, Including StatusBar Even if a second UIWindow isn't recommended, I tried to implement it. It worked as I wanted until the moment that I noticed a problem: the keyboard doesn't appear anymore when needed (for example when clicking in a textbox)!

How can I possibly fix this? Or is there a better approach to my problem? This is my code for creating the second window:

// Create window
statusWindow = [[UIWindow alloc] initWithFrame:CGRectMake(0,0,320,20)];
statusWindow.windowLevel = UIWindowLevelStatusBar;
[statusWindow makeKeyAndVisible];

// Create statusBarButton
statusBarButton = [UIButton buttonWithType:UIButtonTypeCustom];
CGRect buttonFrame2 = statusBarButton.frame;
buttonFrame2.size = CGSizeMake(320,20);
statusBarButton.frame = buttonFrame2;
[statusBarButton addTarget:self action:@selector(goTop) forControlEvents:UIControlEventTouchUpInside]; 

// Place button into the new window
[statusWindow addSubview:statusBarButton];

Answer 1

in AppDelegate file

self.window.windowLevel = UIWindowLevelStatusBar;

or in any other class

[AppDelegate appDelegate].window.windowLevel = UIWindowLevelStatusBar;

and if you want to make status bar to be on the top again u can set

self.window.windowLevel = UIWindowLevelNormal;