how to access "UIWindow" from any class?

Discussion in 'Mac Programming' started by springframework, Apr 1, 2008.

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  1. springframework, Apr 1, 2008

    springframework macrumors member

    Joined:
    Mar 31, 2008
    #1
    I know there is only one UIWindow object so there should be something like UIWindowInstance(); to retrieve it, allowing you to add views and get rid of views in whatever class you want.

    so what is the way to get the UIWindow?
     
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  2. springframework, Apr 1, 2008

    springframework thread starter macrumors member

    Joined:
    Mar 31, 2008
    #2
    Inside a class that extends UIView i can use self.window to get the window.

    the instance of this class that i call self.window from is already added to the window. I am not sure if this would work before the instance is added to the window.


    does anyone have a way of accessing the UIWindow from any class, without passing a reference to it or a reference to the class that created it?

    I tried to make it a global variable but this didn't seem to work for me, maybe I just did it wrong?
     
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  3. Littleodie914, Apr 1, 2008

    Littleodie914 macrumors 68000

    Littleodie914

    Joined:
    Jun 9, 2004
    Location:
    Rochester, NY
    #3
    Sure! :)

    There are two different ways to access the UIWindow objects currently being used by the application:

    Code:
    [[UIApplication sharedApplication] keyWindow]
    This will return the currently "on top" window, (technically, the one that was most recently told to display itself) and is probably the only one you'll need for a simple application.

    For anything more elaborate though, especially if you know you'll be using more than one window, you can use:

    Code:
    [[UIApplication sharedApplication] windows]
    Which will return an NSArray containing all the UIWindow objects currently "owned" by the application. Happy coding! :D
     
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