NavigationStack {
                    TextField("Factor Name", text: $factName)
                        .textFieldStyle(.roundedBorder)
                        .padding()
                                    Picker("Factor Type:", selection: $factType, content: {
                                        Text("Numeric").tag("num")
                                        Text("Scale").tag("scale")
                                        Text("Yes / No").tag("yn")
                                       Text("Categorical").tag("cat")
                                    })
                    Spacer()
                    if factType == "scale" {
                        HStack {
                            Text("Scale: ")
                            TextField("Low", text: $scaleLow1)
                                .textFieldStyle(.roundedBorder)
                            Text(" to ")
                            TextField("High", text: $scaleHigh1)
                                .textFieldStyle(.roundedBorder)
                        }
                    }
                    else if factType == "cat" {
                       ** NavigationLink("Add categories: ", destination: CategoryAdd(catArray: $catArray))
                    }**
                    Toggle(isOn: $setGoal) {
                        Text("Set-Goal:")
                            .multilineTextAlignment(.center)
                    }
                    Spacer()
                    if setGoal {
                        if (factType == "num" || factType == "scale") {
                            Text("Successful day: ")
                            HStack {
                                Button("Exact") {
                                    numericButton = "exact"
                                }
                                .buttonStyle(.bordered)
                                Button("Range") {
                                    numericButton = "range"
                                }
                                .buttonStyle(.bordered)
                            }
                            if numericButton == "range"
                            {
                                TextField("Minimum", text: $successMin)
                                    .textFieldStyle(.roundedBorder)
                                TextField("Maximum", text: $successMax)
                                    .textFieldStyle(.roundedBorder)
                            }
                            if numericButton == "exact"
                            {
                                TextField("", text: $successExact)
                                    .textFieldStyle(.roundedBorder)
                            }
                        }
                        else if (factType == "cat")
                        {
                            **NavigationLink("Pick successful categories:", destination: CatGoalSelect(catArray: $catArray, successCats: $successCats, selected: [""]))**
                        }
                        else if (factType == "yn")
                        {
                            Picker("", selection: $successYN, content: {
                                Text("Yes")
                                Text("No")
                            })
                            .pickerStyle(SegmentedPickerStyle())
                        }
                        Spacer()
                        HStack {
                            Text("How often to succeed?")
                            Picker("", selection: $successFreq, content: {
                                  Text("Everyday").tag("Everyday")
                                  Text("Certain days of the week").tag("Certain days of the week")
                                  Text("Number of days per period").tag("Number of days per period")
                                  })
                        }
                        Spacer()
                        if successFreq == "Certain days of the week"
                        {
                           ** NavigationLink("Choose days of the week", destination: DoWGoalSelect(successDoW: $successDoW))**
                        }

我有三个独立的NavigationLinks（用星号突出显示），有三个独立的目的地视图;点击任何一个链接都会弹出一个包含所有激活链接视图的堆栈（当setGoal为false时，只显示CategoryAdd视图，否则三个视图都会打开）。在目标视图中，我使用一个按钮来关闭。
我尝试更改语法（使用destination：或将视图放在链接的花括号中）。我想使用标签和选择，但它已被弃用。我在一个VStack里放了三个NavigationLinks，它们工作正常（只打开一个视图），所以我觉得这是一个bug，但我是Swift的新手，所以我不知道。