ios access main window or view

I would like to know if there is a simple way to access the main window or view in IOS. Something similar to:

开发者_StackOverflow

[UIScreen mainScreen]

Thank you.

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Try :

UIWindow *frontWindow = [[[UIApplication sharedApplication] windows]
                                                            lastObject];

or simply :

UIWindow *frontWindow = [[UIApplication sharedApplication] keyWindow];

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The main window is best found using UIWindow * mainWindow = [UIApplication sharedApplication].windows.firstObject;

Using keyWindow can return a keyboard or UIAlertView window, which lie above your application window.

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If you have a pointer to some subview in the window, you can easily access its window:

UIWindow *window = mySubview.window;

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Simply clever, works from any class:

[(YourAppDelegate *)[[UIApplication sharedApplication] delegate] window];

Note: don't forget to import your appDelegate class