查找不同的数组是否具有相同的元素并打开警报

如何解决查找不同的数组是否具有相同的元素并打开警报

我从这个问题中知道这个问题之前已经在这个网站上回答过，但请读到最后，因为我找不到答案。

所以，我有一个包含 TagsModel 值的数组：

import SwiftUI
import Combine

class DataManager : Equatable,Identifiable,ObservableObject {

static let shared = DataManager()

@Published var storageTags : [TagsModel] = []
typealias StorageTags = [TagsModel]

//The rest of the code
}

和标签模型：

import SwiftUI
import Combine

class TagsModel : Codable,Equatable,ObservableObject  {

    var id = UUID()
    var tagName : String
    var value : [ValueModel] = []
    
    init(tagName: String) {
        self.tagName = tagName
    }
    
    static func == (lhs: TagsModel,rhs: TagsModel) -> Bool {
        return lhs.id.uuidString == rhs.id.uuidString
    }
}

如果需要，ValueModel 是：

import SwiftUI
import Combine

class ValueModel : Codable,ObservableObject,Comparable {

    var id = UUID()
    var name : String
    var notes : String?
    var expires : Date?
    
    init(name: String,notes: String?,expires: Date?) {
        self.name = name
        self.notes = notes
        self.expires = expires
    }
}

现在我想做的是让用户将 ValueModel 类型的元素添加到每个 TagsModel 的数组 Value 中（这在英文中意味着我希望用户能够在他们所属的标签中添加值）。我可以完成所有这些，但我想添加一个检查：如果任何其他 TagsModel 包含用户尝试添加的值，则显示警报（因为每个值只能有一个标签）。此警报应询问用户他/她是要将该值添加到所选标签并将其从另一个标签中删除，还是取消操作。

到目前为止我设法做的是：

import SwiftUI

struct SelectValuesForTagsView: View {
    
    @ObservedObject var dm: DataManager
    var tm: TagsModel
    
    @Binding var showSheetSelectValuesForTagsView : Bool
    @State var showAlertValueAlreadyInTag = false
    
    @Environment(\.presentationMode) var mode: Binding<PresentationMode>
    @GestureState private var dragOffset = CGSize.zero
    
    @Environment(\.colorScheme) var colorScheme
    
    
    var body: some View {
        NavigationView {
            Form {
                ForEach(dm.storageValues) { valuesOfForEach in
                    HStack {
                        if tm.value.contains(where: { $0.id.uuidString == valuesOfForEach.id.uuidString
                        }) {
                            Image(systemName: "checkmark.circle.fill")
                                .frame(width: 22,height: 22)
                                .foregroundColor(.green)
                        } else {
                            Image(systemName: "circle")
                                .frame(width: 22,height: 22)
                                .foregroundColor(colorScheme == .dark ? .white : .black)
                        }

                        Button(action: {
                            if !tm.value.contains(where: { $0.id.uuidString == valuesOfForEach.id.uuidString
                            }) {
                                tm.value.append(valuesOfForEach)
                                dm.save()
                            } else {
                                guard let indexValue = tm.value.firstIndex(where: { $0.id.uuidString == valuesOfForEach.id.uuidString
                                }) else { return }
                                  tm.value.remove(at: indexValue)
                                dm.save()
                            }

                        },label: {
                            if tm.value.contains(where: { $0.id.uuidString == valuesOfForEach.id.uuidString
                            }) {
                                Text(valuesOfForEach.name)
                                    .foregroundColor(.blue)
                            } else {
                                Text(valuesOfForEach.name)
                                    .foregroundColor(.yellow)
                            }
                        })

                    }

                }

            }
            .navigationBarTitle(Text("Add Values"),displayMode: .automatic)
            .navigationBarBackButtonHidden(true)
            .navigationBarItems(trailing: saveButton)
        }
    }
    
    var saveButton: some View {
        Button(action: {
            let tag : TagsModel
            if dm.storageTags.contains(where: {$0.value == tm.value}) {
                showAlertValueAlreadyInTag = true


                //The problem is here,that the Alert ALWAYS shows up,even though there's only this Tag containing that value



            }

            else {
            dm.save()
            showSheetSelectValuesForTagsView = false
            }
        },label: {
            Text("Save")
                .foregroundColor(.blue)
        }).alert(isPresented: $showAlertValueAlreadyInTag,content: { alertValueAlreadyInTag })
    }
    var alertValueAlreadyInTag : Alert {
        Alert(title: Text("Attention!"),message: Text("Every value can only be assigned to one tag. One or more values you selected are already into another tag. Would you like to substitute the belonging tag for these values?"),primaryButton: Alert.Button.default(Text("Yes,substitute"),action: {
            dm.save()
            showAlertValueAlreadyInTag = false
            showSheetSelectValuesForTagsView = false
        }),secondaryButton: Alert.Button.default(Text("Cancel"),action: {
            showAlertValueAlreadyInTag = false
        }))
    }
}

如何检查 storageTags 中的另一个标签在其 value Array 中是否已经具有相同的值？