As the title says, when I try to add a Toolbar with a Button to my NavigationSplitView I get a warning about satisfying constraints.
Here is a minimal reproducible example:
import SwiftUI
@main
struct ViewTestingApp: App {
var body: some Scene {
WindowGroup {
NavigationSplitView {
Text("Sidebar")
.toolbar {
ToolbarItem(placement: .topBarTrailing) {
Button {
debugPrint("Hello World!")
} label: {
Label("", systemImage: "flame")
}
}
}
} content: {
Text("Content")
} detail: {
Text("Detail")
}
}
}
}
This is the specific warning I get:
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.
(Note: If you're seeing NSAutoresizingMaskLayoutConstraints that you don't understand, refer to the documentation for the UIView property translatesAutoresizingMaskIntoConstraints)
(
"<NSAutoresizingMaskLayoutConstraint:0x600002164960 h=--& v=--& _TtCC5UIKit19NavigationButtonBar15ItemWrapperView:0x100f80fa0.width == 0 (active)>",
"<NSLayoutConstraint:0x600002160370 _TtCC5UIKit19NavigationButtonBar15ItemWrapperView:0x100f80fa0.leading == _UIButtonBarButton:0x100f7d360.leading (active)>",
"<NSLayoutConstraint:0x6000021603c0 H:[_UIButtonBarButton:0x100f7d360]-(0)-| (active, names: '|':_TtCC5UIKit19NavigationButtonBar15ItemWrapperView:0x100f80fa0 )>",
"<NSLayoutConstraint:0x600002160050 'IB_Leading_Leading' H:|-(2)-[_UIModernBarButton:0x100f7e6c0] (active, names: '|':_UIButtonBarButton:0x100f7d360 )>",
"<NSLayoutConstraint:0x6000021600a0 'IB_Trailing_Trailing' H:[_UIModernBarButton:0x100f7e6c0]-(2)-| (active, names: '|':_UIButtonBarButton:0x100f7d360 )>"
)
Will attempt to recover by breaking constraint
<NSLayoutConstraint:0x6000021600a0 'IB_Trailing_Trailing' H:[_UIModernBarButton:0x100f7e6c0]-(2)-| (active, names: '|':_UIButtonBarButton:0x100f7d360 )>
Make a symbolic breakpoint at UIViewAlertForUnsatisfiableConstraints to catch this in the debugger.
The methods in the UIConstraintBasedLayoutDebugging category on UIView listed in <UIKitCore/UIView.h> may also be helpful.
The project settings are all at their defaults, but in case anyone wants to try it with the whole project: https://github.com/OddMagnet/ViewTesting
