I'm studying Swift programing with using Apple official document "Develop in Swift Tutorial" https://developer.apple.com/tutorials/develop-in-swift/. When I do that, I faced to some problems which I cannot resolve myself. So, could you help or advise me about it. Problem:I can't implement this program which this below text say. How do I write the code?? (This section is that "Wrap-up: Lists and Text fields, Develop in Swift Tutorials") Here's my current states... import SwiftUI struct ContentView: View { @State private var names: [String] = [] @State private var nameToAdd = "" @State private var pickedName = "" @State private var shouldRemovePickedName = false var body: some View { VStack { VStack(spacing: 8) { Image(systemName: "person.3.sequence.fill") .foregroundStyle(.tint) .symbolRenderingMode(.hierarchical) Text("Pick-a-Pal") } .font(.title) .bold() //3項条件演算子 Text(pickedName.isEmpty ? "" : pickedName) .font(.title2) .bold() .foregroundStyle(.tint) List { ForEach(names, id: \.self) { name in Text(name) } } .clipShape(RoundedRectangle(cornerRadius: 8)) TextField("Add Name", text: $nameToAdd) //単語の自動修正をオフにする .autocorrectionDisabled() .onSubmit { if !nameToAdd.isEmpty { names.append(nameToAdd) nameToAdd = "" } } Divider() Toggle("Remove when picked", isOn: $shouldRemovePickedName) Button { if let randomName = names.randomElement() { pickedName = randomName if shouldRemovePickedName { names.removeAll() { name in return (name == randomName) } } } else { pickedName = "" } } label: { Text("Pick Random Name") .padding(.vertical, 8) .padding(.horizontal, 16) } .buttonStyle(.borderedProminent) .font(.title2) } .padding() } } #Preview { ContentView() }

Hi! I followed the Apple's SwiftUI Tutorials"LandmarksApp".But When I resume preview at "LandmarkRow.swift", landmarksApp was clashed by unexpected reason. I couldn't find why this problem was happened. Please tell me how to solve this problem. ↓My Mac details MacBookPro 13inch (2020-M1) 16GB memory,512GB SSD macOS Monterey 12.2.1, Xcode version 13.2.1