I have a severe problem with the SwiftUI List view in Xcode 12 (beta) (MacOS App).
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.
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
}
})
}
}
}
