iphone - iOS Blank White Space at bottom of viewcontroller -

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a strange white space appears @ bottom of viewcontroller disappear.

white space hides button @ bottom left.

please, me out, i've searched lot thing came across is

  self.automaticallyadjustsscrollviewinsets = false;

but it's not working thanks

this can happen due either of 2 reasons 1. view overlapping view 2. height view not enough contain contents , view.clipstobounds set yes.

view debugging option in xcode can show happening. reproduce issue in simulator , press 'debug view hierarchy' button in xcode. xcode render 3d model of view hierarchy can view angle moving model around mouse. click on point on model , xcode tell view , can identify overlapping view.


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