Question 69178 in IOS Swift Question posted in
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ProgressView hides on list scroll – Ios swift

I have a List with a ProgressView and some rows. When I scroll the List down and up again, the ProgressView get hidden, I notice this bug only with a certain number of rows, for example on iPhone 13 you can reproduce this bug if you have 20 rows.

struct ContentView: View {
    var body: some View {
        List {
            ProgressView()
            ForEach(0..<20, id: .self) {
                Text("($0)")
            }
        }
    }
}

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2

Answers


  1. 0

    I know that it’s probably too late. But I also had this problem and figured it might be caused by SwiftUI "recovering" your previously used view that (for some reason) it’s now hidden.

    So what I did to fix this was just adding a unique ID to my progress view, this way SwiftUI won’t try to re-utilize it.

    Ex:

    ProgressView().id(UUID())
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  2. 0

    okay, so first thing first, thank you EdYuTo for giving a correct answer. The reasoning is also correct, we are reusing "cells" to save memory.

    Alternatively we could use SwiftUI.Section{} to solve this missing progressView() issue. You would basically need to put the progressView() inside the Section.

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