How can I tell a subview to resize when its superview changes size?

Question

I'm working on an iOS application that has a UIViewController whose view has a MapView as a subview. However, when I run the application and try to rotate the view in the simulator, it doesn't work as it should; it leaves a black box as shown:

How can I tell the MapView to resize along with its superview?

Do you have any constraints or autoresizing masks set up? Your map needs to know how to resize itself when it's superview changes size — dan, Apr 27 '16 at 22:58
My MapView is a subview of the UIViewController's view. How can I tell the map how to resize itself when the superview changes size? — Jake Sebright, Apr 27 '16 at 23:04

score 1 · Answer 1 · answered Apr 27 '16 at 23:09

Try to use this code

ObjC

yourMapView.autoresizingMask = UIViewAutoresizingFlexibleRightMargin |
                               UIViewAutoresizingFlexibleLeftMargin |
                               UIViewAutoresizingFlexibleBottomMargin;

Swift

yourMapView.autoresizingMask = [.FlexibleRightMargin, .FlexibleLeftMargin, .FlexibleBottomMargin]

How can I tell a subview to resize when its superview changes size?

1 Answers1