I get this when traversing a NavigationLink (ex. NavigationButton) in the iOS simulator:
Thread 1: EXC_BAD_INSTRUCTION (code=EXC_I386_INVOP, subcode=0x0)
Steps to reproduce:
1. List { ForEach { NavigationLink { Text("detail") } } } }
2. Run in simulator
3. Press on any element
4. The table view cell becomes grey and EXC_BAD_INSTRUCTION is generated
I'm also getting an error when performing navigation after updating to beta 3. I simply changed NavigationButton to NavigationLink, but I am not unable to add view to the navigation stack. It seems that PresentationLink is working as expected, but I cannot navigate to a List from a parent List using NavigationLink.
EDIT - I was accessing an environment object in multiple views. As soon as I added the environmentObject() modifier to each view that is shown, the crashes stopped happening. I'm not sure if this is intended, but I don't think that I should need to explicitly pass an environment object between views.
I'm also getting an error when performing navigation after updating to beta 3. I simply changed NavigationButton to NavigationLink, but I am not unable to add view to the navigation stack. It seems that PresentationLink is working as expected, but I cannot navigate to a List from a parent List using NavigationLink.
EDIT - I was accessing an environment object in multiple views. As soon as I added the environmentObject() modifier to each view that is shown, the crashes stopped happening. I'm not sure if this is intended, but I don't think that I should need to explicitly pass an environment object between views.
> As soon as I added the environmentObject() modifier to each view that is shown, the crashes stopped happening.
Same here, and not just for NavigationLink but also for TabbedViews.
I don't think this should be happening either. But at least there is a workaround until this is fixed. Thanks for the tip!
I confirm it works. The tutorial page has been updated using environmentObject() modifier as well.
It's probably a new norm.
@available(iOS 13.0, OSX 10.15, tvOS 13.0, watchOS 6.0, *)
extension View {
/// Supplies a `BindableObject` to a view subhierachy.
///
/// The object can be read by any child by using `EnvironmentObject`.
///
/// - Parameter bindable: the object to store and make available to
/// the view's subhiearchy.
public func environmentObject<B>(_ bindable: B) -> Self.Modified<_EnvironmentKeyWritingModifier<B?>> where B : BindableObject
}
This no longer seems necessary, as of beta 4. The tutorial only uses it once, in SceneDelagate.swift. And also in previews, but nowhere else.
