SwiftUI changing environment object re-created observed object in same view

Question

So, I have few steps, last one contains EnvironmentObject and ObservedObject. The issue is, when I try to modify EnvironmentObject (lane 68) it re-creates ObservedObject. Can any one explain me why this happens? Any solution to keep my ObservedObject with original state?

As far as I know it possible to change ObservedObject to StateObject, but I am using iOS 13+ so... I need other solution.

Asperi · Accepted Answer · 2021-08-16 09:14:43Z

2

Line 47 - body is reevaluated so new instance of ObservedStuff is created, so make it as property and pass it in, like

struct TestView_A: View {
   ...
   private let model = ObservedStuff()

   var body: some View {
      NavigationLink(destination: TestView_B(viewModel: self.model) ...
   }
}

answered Aug 16, 2021 at 9:14

Asperi

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2 Comments

George Heints Over a year ago

question, but it's still gonna be evaluated if I remove if from lane 47 and put it on lane 54?

Asperi Over a year ago

Yes, sure, because TestView_B is recreated in that place.

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