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Home/ Questions/Q 6677149
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Editorial Team
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Editorial Team
Asked: May 26, 20262026-05-26T04:04:53+00:00 2026-05-26T04:04:53+00:00

in iPhone: When I add a subview to a view, using [myview addsubview: anotherview.view

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in iPhone: When I add a subview to a view, using [myview addsubview: anotherview.view ] will “my view” retain in memory which may cause a problem when adding a big number of views as subviews.

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  1. Editorial Team
    Editorial Team
    2026-05-26T04:04:54+00:00Added an answer on May 26, 2026 at 4:04 am

    Yes addSubView retains the subViews you add, and yes if you add way too many subViews you could run into memory issues, but that is highly unlikely, if that happens you will receive the

    - (void)didReceiveMemoryWarning
    

    Followed by the:

    - (void)viewWillUnload
    

    and then:

    - (void)viewDidUnload
    

    This will unload your view, and release its subviews. However don’t forget to set the additional subViews to nil on the viewDidUnload method, as that subviews are also retained by the ViewController itself, therefore they will not get released when the view unloads, unless you set them to nil here.

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