ios - UIView's frame rendering larger than frame -

i trying add subview uiscrollview. first instantiate view controller storyboard, set view's frame application bounds. when add view uiscrollview, larger it's supposed be.

cgrect mainframe = cgrectmake(0, topbuttonheight, screenwidth, screenheight);  feelingvc = (feelingviewcontroller *)[self.storyboard instantiateviewcontrollerwithidentifier:@"feelingvc"]; feelingvc.delegate = self; feelingview = feelingvc.view; [feelingview setframe:mainframe]; [self.scrollview addsubview:feelingview]; 

i can tell because background color extending past should be. "debug view hierarchy" mode in xcode confirms this. but, if inspect view's frame, prints out should be, not is.

a view of same size, generated programatically, works should:

mainview = [[uiview alloc] initwithframe:mainframe]; mainview.backgroundcolor = [uicolor blackcolor]; [self.scrollview addsubview:mainview]; 

i'm not sure causing issue - i've instantiated other views view controllers, via storyboard, , set frames without problems.

edit: being called viewdidload of view controller containing uiscrollview. screenwidth & screenheight calculated such (they instance variables):

screenwidth = [uiscreen mainscreen].applicationframe.size.width; screenheight = [uiscreen mainscreen].applicationframe.size.height; 

try set view frame in viewwillappear method.

viewdidload not place set frames (because called once when view getting loaded.), ui components not configured system yet.

also, prefer use:

screenwidth = [uiscreen mainscreen].bounds.size.width; screenheight = [uiscreen mainscreen].bounds.size.height; 

instead of

screenwidth = [uiscreen mainscreen].applicationframe.size.width; screenheight = [uiscreen mainscreen].applicationframe.size.height;  

since bounds has correct positional information taking consideration device's orientation in case.

or can this, after initializing mainview inside viewdidload: method

- (void)viewwillappear:(bool)animated {     [super viewwillappear:animated];     mainview.frame = [uiscreen mainscreen].bounds; } 

you can add reconfigure view frame whenever subviews updated:

- (void)viewwilllayoutsubviews { //or viewdidlayoutsubviews     [super viewwilllayoutsubviews];     mainview.frame = [uiscreen mainscreen].bounds; }