Open Radar

 
I want to hide a MKMapView dynamically at runtime. For this purpose, I attach a NSLayoutConstraint with a height constant of 0. Every time this constraint gets activated the following warning appears in the console:

---

Unable to simultaneously satisfy constraints.
	Probably at least one of the constraints in the following list is one you don't want. 
	Try this: 
		(1) look at each constraint and try to figure out which you don't expect; 
		(2) find the code that added the unwanted constraint or constraints and fix it. 
(
    "<NSLayoutConstraint:0x6000004816d0 UILayoutGuide:0x60000019e850'Edge Insets'.top == MKMapView:0x7f96b4054c00.top + 8   (active)>",
    "<NSLayoutConstraint:0x600000286680 UILayoutGuide:0x60000019e850'Edge Insets'.bottom == MKMapView:0x7f96b4054c00.bottom - 8   (active)>",
    "<NSLayoutConstraint:0x60800028f0f0 MKMapView:0x7f96b4054c00.height == 0   (active)>"
)

Will attempt to recover by breaking constraint 
<NSLayoutConstraint:0x600000286680 UILayoutGuide:0x60000019e850'Edge Insets'.bottom == MKMapView:0x7f96b4054c00.bottom - 8   (active)>

---

I can prevent this issue by setting the MKMapView's bounds height manually to 0 before activating the constraint.

The issue also occurs when MKMapView is inside a UIStackView and I set the map view's 'hidden' property to 'true'. In this case, UIStackView hides the map view by adding an internal height constraint with a constant of 0.