iphone - Problem when changing between Subviews (iOS Developement) -

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i developing ios 5 6 months now. right trying implement face detection algorithm marks faces on uiimage take avfoundation framework.

well, works (almost) fine. during programming stages had simple buttons steps 1 @ time. worked great.

now packed 1 button click, after 2-3 minutes nothing showed up. played around little nslog outputs mark time when every step completed , algorithm , successful, view still not change show image packed uiimageview subview of other view.

funny thing is, when nslog message can click on place on screen other buttons (as placed them in interface builder) , buttons react interaction though nothing shown!?

i transit between uiviews setting alpha value 0.0 , 1.0. tried transit [[viewcontroller view] bringsubviewtofront:subview]; didn't help!

anyone knows problem might be?

best regards!

it making changes views on background thread. try performing changes on main thread.


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