How to use ScrollViewReader in SwiftUI

Issue #761

Explicitly specify id

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ScrollView {
ScrollViewReader { proxy in
LazyVStack(spacing: 10) {
ForEach(items) { item in
Cell(item: item)
.id(item.id)
}
}
.padding()
.onReceiveKeyboard(onNext: {
onNext()
if let item = selectedItem {
proxy.scrollTo(item.id, anchor: .center)
}
}, onPrevious: {
onPrevious()
if let item = selectedItem {
proxy.scrollTo(item.id, anchor: .center)
}
})
}
}

I usually extract ScrollViewReader into a helper function that use onChange to react to state changes

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 func scrollViewReader<Content: View>(@ViewBuilder content: @escaping () -> Content) -> some View {
ScrollViewReader { proxy in
content()
.onChange(of: itemsHolder.focusItem) { item in
guard let item = item else { return }
withAnimation {
proxy.scrollTo(item.id, anchor: .center)
}
}
}
}

Updated at 2021-02-21 19:14:01

Comments

You need to set client_id and slot_id to show this AD unit. Please set it in _config.yml.