How to add and remove views with a transition
Fully updated for Xcode 11.2
You can include or exclude a view in your design just by using a regular Swift condition. For example, this adds or removes some details text when a button is tapped:
struct ContentView: View {
@State private var showDetails = false
var body: some View {
VStack {
Button(action: {
withAnimation {
self.showDetails.toggle()
}
}) {
Text("Tap to show details")
}
if showDetails {
Text("Details go here.")
}
}
}
}By default, SwiftUI uses a fade animation to insert or remove views, but you can change that if you want by attaching a transition() modifier to a view.
For example, we could make the details text view slide in or out from the bottom, like this:
Text("Details go here.")
.transition(.move(edge: .bottom))There’s also the .slide transition, which causes a view to be animated in from its leading out and animated out on its trailing edge:
Text("Details go here.")
.transition(.slide)And the .scale transition, which causes a view to be scaled up from nothing to full size when coming in, then back down to nothing when going out:
Text("Details go here.")
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