SwiftUI: withAnimation in onChange not working

Question

Created Jan ’21

Replies 2

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I am trying to create an animation that is triggered by a change in a different value. However, the animation is not working. The view just "pops-up" immediately instead of using it's transition.

Code Block struct ContentView: View {
    @State private var count = 0
    @State private var isShowing = false
    var body: some View {
        VStack {
            if isShowing {
                Text("SHOWING")
                    .transition(.scale)
            }
            Button("Increase") {
                count += 1
            }
        }
            .frame(width: 200, height: 200)
            .onChange(of: count, perform: { (count) in
                withAnimation {
                    isShowing.toggle()
                }
            })
    }
}

Answered by joosttk in 656071022

Ah yes, I now tried it in a project, and that works as expected. Before I tried it in a Playground, which did not work. So issue solved :)

Boost

Answer 1

OOPer OP

Jan ’21

As far as I tested your code, the Text SHOWING zooms up and down on tap of the button.

Can you explain the condition to reproduce your issue?

0

Answer 2

joosttk OP

Jan ’21

Accepted Answer

Ah yes, I now tried it in a project, and that works as expected. Before I tried it in a Playground, which did not work. So issue solved :)

0