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@@ -2,7 +2,7 @@ import SwiftUI | |
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| struct ContentView: View { | ||
| var body: some View { | ||
| MapView() | ||
| ScrollReader() | ||
| } | ||
| } | ||
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| Original file line number | Diff line number | Diff line change |
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| @@ -0,0 +1,75 @@ | ||
| import SwiftUI | ||
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| struct ScrollReader: View { | ||
| @Namespace var topID | ||
| @Namespace var bottomID | ||
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| @State private var selectedIndex = 0 | ||
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| var selectedBG: (Int, Int) -> Color = { currentItemIndex, selectedItemIndex in | ||
| currentItemIndex == selectedItemIndex ? Color.green : Color.yellow | ||
| } | ||
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| var body: some View { | ||
| VStack { | ||
| ScrollViewReader { proxy in | ||
| ScrollView(.vertical, showsIndicators: false) { | ||
| Button("Scroll to Bottom") { | ||
| withAnimation { | ||
| proxy.scrollTo(bottomID) | ||
| } | ||
| } | ||
| .id(topID) | ||
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| ForEach(0...100, id: \.self) { index in | ||
| Text("번호: \(index)") | ||
| .padding(50) | ||
| .background(selectedBG(index, selectedIndex)) | ||
| .id(index) | ||
| } | ||
| .onChange(of: selectedIndex) { changedIndex in | ||
| withAnimation { | ||
| proxy.scrollTo(changedIndex, anchor: .center) | ||
| } | ||
| } | ||
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| Button("Scroll to Top") { | ||
| withAnimation { | ||
| proxy.scrollTo(topID) | ||
| } | ||
| } | ||
| .id(bottomID) | ||
| } | ||
| } | ||
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| HStack { | ||
| Button { | ||
| selectedIndex = 10 | ||
| } label: { | ||
| Text("인덱스: 10") | ||
| .padding() | ||
| } | ||
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| Button { | ||
| selectedIndex = 50 | ||
| } label: { | ||
| Text("인덱스: 50") | ||
| .padding() | ||
| } | ||
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| Button { | ||
| selectedIndex = 80 | ||
| } label: { | ||
| Text("인덱스:80") | ||
| .padding() | ||
| } | ||
| } | ||
| } | ||
| } | ||
| } | ||
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| struct ScrollReader_Previews: PreviewProvider { | ||
| static var previews: some View { | ||
| ScrollReader() | ||
| } | ||
| } |