I am trying to use drawRect to draw a rectangle in the space below a collectionView contained in another view (self in the code below) using the frames of both views to define the rectangle.
This code works fine until the device orientation changes. Everything I have tried calls drawRect before the animated rotation begins. This means the collectionView.frame and self.frame have not yet been adjusted by autoLayout and the resulting rectangle is wrong.
CGRect frame = self.collectionViwOutlet.frame;
CGFloat x = frame.origin.x;
CGFloat y = frame.origin.y + frame.size.height + 8;
CGFloat w = frame.size.width;
CGFloat h = self.frame.origin.y + self.frame.size.height - y - 8;
CGRect drawableRect = CGRectMake(x, y, w, h);
Any suggestions would be appreciated.
On your custom UIView override there layoutSubviews, which will be called for you by the system only when needed and when all the variables (orientation, size, etc.)
PS.: Consider it: https://stackoverflow.com/a/19505582/846780