MKMapkit constraint error when reopen project

Question

I built a custom view controller. It has 1 tableview, 2 views and 1 map. When I set the constraints for this layout it works fine. I close project and reopen the map view out of the view controller. The width and height are 1000 points. If I set the map on top of this stack, there is no problem. But when I set map in the middle of the other views, a problem happens. I must put this mapview inside another view or it affects the others, but the problem is still there.

I use Xcode 8 beta 5, and constraint is 0 0 0 0

Rhizocarpous

What is "constraint is 0 0 0 0"? – Aprilette

constraint top, right, bottom and left – Rhizocarpous

sorry if I ask, but why using a beta version of Xcode? maybe the issue is related to this... does it happens on last Xcode 7? – Felonry

I am build prototype app for ios 10 course, so I cant use Xcode 7 :D – Rhizocarpous

i think you enabled size classes but designing in a fixed size of IB. try to change it once. – Chun

Try to add centerX, centerY and equals superview Height, equals superview Width to your mapView (you may need to embed it in another UIView). – Samara

Answer 1

I have the same issue in the latest beta. I believe the problem is in the wrong default size, that is always set to 1000x1000 by Xcode for MKMapView.

I would wait for the fix in the next Xcode version.

If you, by some reason, really need it fixed now, you can setup a UIView with constraints as required, then put MKMapView inside the UIView and use Autoresizing to scale it.

Judy

Answer 2

In re this very old question, the same or similar problem appears to exist in 2024.

Basically if you animate the size of a map (particularly try making it small), you will endlessly get ...

Will attempt to recover by breaking constraint <NSLayoutConstraint:0x600006391130 'UISV-canvas-connection' MKPassThroughStackView:0x102538e60.top == MKUserTrackingButton:0x1737c8560.top (active)>

and similar constraint complaints.

It does seem to be harmless - so sloppy by Apple.

Piggin