Created
July 10, 2021 12:14
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SwiftUI LazyVStack reordering
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| import SwiftUI | |
| import UniformTypeIdentifiers | |
| @available(iOS 13.0.0, *) | |
| struct ContentView: View { | |
| @State var items = ["1", "2", "3"] | |
| @State var draggedItem : String? | |
| var body: some View { | |
| LazyVStack(spacing : 15) { | |
| ForEach(items, id:\.self) { item in | |
| Text(item) | |
| .frame(minWidth:0, maxWidth:.infinity, minHeight:50) | |
| .border(Color.black).background(Color.red) | |
| .onDrag({ | |
| self.draggedItem = item | |
| return NSItemProvider(item: nil, typeIdentifier: item) | |
| }) .onDrop(of: [UTType.text], delegate: MyDropDelegate(item: item, items: $items, draggedItem: $draggedItem)) | |
| } | |
| } | |
| } | |
| } | |
| struct MyDropDelegate : DropDelegate { | |
| let item : String | |
| @Binding var items : [String] | |
| @Binding var draggedItem : String? | |
| func performDrop(info: DropInfo) -> Bool { | |
| return true | |
| } | |
| func dropEntered(info: DropInfo) { | |
| guard let draggedItem = self.draggedItem else { | |
| return | |
| } | |
| if draggedItem != item { | |
| let from = items.firstIndex(of: draggedItem)! | |
| let to = items.firstIndex(of: item)! | |
| withAnimation(.default) { | |
| self.items.move(fromOffsets: IndexSet(integer: from), toOffset: to > from ? to + 1 : to) | |
| } | |
| } | |
| } | |
| } |
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