Hi all,
Has anyone been able to successfully integrate Realm with SwiftUI, especially deleting records/rows from a SwiftUI List? I have tried a few different things but no matter what I do I get the same error. After reading some related threads I found out that other people have the same issue.
The following code successfully presents all of the items from Realm in a SwiftUI List, I can create new ones and they show up in the List as expected, my issues is when I try to delete records from the List by either manually pressing a button or by left-swiping to delete the selected row, I get an Index is out of bounds error.
Here is my code:
Realm Model
class Dog: Object {
@objc dynamic var name = ""
@objc dynamic var age = 0
@objc dynamic var createdAt = NSDate()
@objc dynamic var userID = UUID().uuidString
override static func primaryKey() -> String? {
return "userID"
}
}
SwiftUI Code
class BindableResults<Element>: ObservableObject where Element: RealmSwift.RealmCollectionValue {
var results: Results<Element>
private var token: NotificationToken!
init(results: Results<Element>) {
self.results = results
lateInit()
}
func lateInit() {
token = results.observe { [weak self] _ in
self?.objectWillChange.send()
}
}
deinit {
token.invalidate()
}
}
struct DogRow: View {
var dog = Dog()
var body: some View {
HStack {
Text(dog.name)
Text("\(dog.age)")
}
}
}
struct ContentView : View {
@ObservedObject var dogs = BindableResults(results: try! Realm().objects(Dog.self))
var body: some View {
VStack{
List{
ForEach(dogs.results, id: \.name) { dog in
DogRow(dog: dog)
}.onDelete(perform: deleteRow )
}
Button(action: {
try! realm.write {
realm.delete(self.dogs.results[0])
}
}){
Text("Delete User")
}
}
}
private func deleteRow(with indexSet: IndexSet){
indexSet.forEach ({ index in
try! realm.write {
realm.delete(self.dogs.results[index])
}
})
}
}
Error
Terminating app due to uncaught exception ‘RLMException’, reason: ‘Index 23 is out of bounds (must be less than 23).’
Of course, the 23 changes depending on how many items are in the Realm database, in this case, I had 24 records when I swiped and tapped the delete button.