| < How to fix “Modifying state during view update, this will cause undefined behavior” | How to fix “Fatal error: No ObservableObject of type SomeType found” > |
How to fix “Protocol 'View' can only be used as a generic constraint because it has Self or associated type requirements”
Fully updated for Xcode 11.4
This is a particularly confusing problem, and it occurs because SwiftUI relies heavily on opaque return types. The problem happens because of code like this:
struct ContentView: View {
var body: View {
Text("SwiftUI")
}
}It feels like such a tiny thing, but the body property is declared as returning View rather than some View. The difference is small but important – you can find out more about it in my article How to use opaque return types in Swift 5.1.
So, to fix the problem use this instead:
struct ContentView: View {
var body: some View {
Text("SwiftUI")
}
}
SPONSORED Building in-app subscriptions are hard. RevenueCat makes it simple. With their open source SDKs, you can painlessly implement subscriptions for your app in hours, not months.
Sponsor Hacking with Swift and reach the world's largest Swift community!
Similar solutions…
