Hi,
I have a severe problem with the SwiftUI List view in Xcode 12 (beta).
When a List item, which is selected, is removed, the List crashes every time.
"[General] Row 2 out of row range [0-1] for rowViewAtRow:createIfNeeded:"
Looks like a bug in SwiftUI to me.
What can I do to prevent the crash? I've tried several things already, but with no success. I'm stuck with this problem since 3 days now...
Example code:
// Example to reproduce bug
// * Select no item or other than last item and press button: selection is reset, last item is removed, no crash
// * Select last list item and press button "Delete last item" => Crash
//
import SwiftUI
class MyContent: ObservableObject {
@Published var items: [String] = []
@Published var selection: Set<String> = Set()
init() {
for i in 1...5 {
self.items.append(String(i))
}
}
}
struct MyView: View {
@ObservedObject var content: MyContent = MyContent()
var body: some View {
VStack {
List(content.items, id: \.self, selection: $content.selection) {
item in
Text("\(item)")
}
Button("Delete last item", action: {
if content.items.count > 0 {
content.selection = Set() // reset selection
var newItems = Array(content.items)
newItems.removeLast()
content.items = newItems
}
})
}
}
}
h725
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I'm developing a SwiftUI App for macOS in Xcode 13.2.
When I try to run the App in Xcode, I get this error messages in the console and the app terminates:
2021-12-28 13:13:21.680087+0100 MyAppProject[21343:363165] [CK] Giving up waiting to register for remote notifications
2021-12-28 13:13:23.548389+0100 MyAppProject[21343:362383] Unable to load nib file: MyAppStartViewName, exiting
Until now, the error happend sporadically. Now I use a new MacBookPro with M1max and the error happens every time.
As it is a SwiftUI App, there is no nib file at all. I didn't find any information about SwiftUI generating a nib file...
How can I prevent the bug and get the App running? Any hints are welcome :-)
Hi,
I thought this should be quite easy and maybe I only have tomatoes on my eyes, but I cannot find out how to call an action when the user clicks the red button or use CMD-W to close the Preferences window (= Settings Scene).
I use Core Data. In the Preferences, many data structures, which define my system, are changed.
I learned, that you shouldn't save too often to avoid performance problems, so now I want to save the Core Data context when the user closes the Preferences window.
I tried .onDisappear, onChange of focus etc. but this didn't work.
How can I define an action?
Any hints are welcome :-)