twitter - iOS : How to create view which is top of all screen -

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i know, how create view or control each time top of view, here attached music player screenshot mini music player top of screen (view controller), create kinds of control when mount on top of view controller, in background if push , pop of vc not affect of mini control (view).

please provide feedback, if know kinds of control please pass link.

enter image description here

you can try this

[[[uiapplication sharedapplication] keywindow] addsubview:yourcustomview];

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