当其父视图更改大小时，如何告诉子视图调整大小？

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?

Answer 1

Try to use this code

ObjC

yourMapView.autoresizingMask = UIViewAutoresizingFlexibleRightMargin |
                               UIViewAutoresizingFlexibleLeftMargin |
                               UIViewAutoresizingFlexibleBottomMargin;

Swift

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