別 ViewのTextEditorへの分岐による代入

Question

Listの中でNavigationLinkを使用しています。

配列をそれぞれ別Viewに入れさらにその配列のテキストを別ViewのTextEditorに入れたいです

実現したいこと

配列をそれぞれのセルタップ毎に別Viewで表示しさらにそれらの配列を別ViewのTextEditorに入れたいです

発生している問題・エラーメッセージ

Expected ':' after '? ...' in ternary expression

該当のソースコード

var passedPinned: [String]?

struct ContentView: View {
    var aFolder = ["a"]
    var bFolder = ["b"]
    var cFolder = ["c"]
    var dFolder = [folderRow]
    var body: some View {
        NavigationView {
            List{
                Section(header: Text("テキスト"))
                {
                    ForEach(0..<3)
                    { index in
                        NavigationLink(destination: ArrayView(row: (index == 0 ? aFolder : (index == 1 ? bFolder : cFolder))), label: index == 0 ?
{folderRow(rowArray: aFolder, rowImageString: "heart", rowTitle: "Like")} : (index == 1 ? {folderRow(rowArray: bFolder, rowImageString: "trash", rowTitle: "Dust")} : {folderRow(rowArray: cFolder, rowImageString: "folder", rowTitle: "Folder") : {folderRow(rowArray: dFolder, rowImageString: "folder", rowTitle: "\(yourRowTitle)")}))
                    }
                }
            }
        }
    }
}

struct ArrayView: View {
    @State var row : [String]
    var body: some View {
        List{
                Section(header: Text("テキスト"))
                {
                    ForEach(0..<self.row.count)
                    { index in
                        NavigationLink(destination: AnotherView(textEditorText: (index == ContentView.aFolder[index] ? ContentView.aFolder[index] : (index == ContentView.bFolder[index] ? ContentView.bFolder[index] : (ContentView.cFolder[index] ? ContentView.cFolder[index], (ContentView.dFolder[index] ? ContentView.dFolder[index], index: index)), label: {Text(index == ContentView.aFolder[index] ? ContentView.aFolder[index] : (ContentView.bFolder[index] ? ContentView.bFolder[index] : (ContentView.cFolder[index] ? ContentView.cFolder[index], ContentView.dFolder[index] ? ContentView.dFolder[index])))}}
                            .onAppear(perform: {
                                if let recive = passedPinned {
                                    row = recive
                                }
                            })
                            .onDisappear(perform: {passedPinned = row})
                    
                }
            }
            }
        }
    


struct folderRow: View {
    var rowArray: [String] = []
    var rowImageString = ""
    var rowTitle: String = ""
    var body: some View {
        HStack{
            Image(systemName: rowImageString)
            Text(rowTitle)
            Text("\(rowArray.count)")
        }
    }}

struct AnotherView: View {
    @State var textEditorText: String
    var index = 0
    var body: some View {
        TextEditor(text: $textEditorText)
            .frame(maxWidth: .infinity, maxHeight: .infinity)
            .onChange(of: textEditorText){ value in
                passedPinned![index] = value
            }
    }
}

試したこと

補足情報（FW/ツールのバージョンなど）

SwiftUIのバージョンは14.1です。

dFolderには別Viewから任意で追加します。

Comments

[ura4]

struct ArrayView: View {
@State var row : [String]
var body: some View {
List{
Section(header: Text("テキスト"))
{
ForEach(0..<self.row.count)
{ index in
NavigationLink(destination: AnotherView(textEditorText: (row[index])))}}
.onAppear(perform: {
if let recive = passedPinned {
row = recive
}
})
.onDisappear(perform: {passedPinned = row})

}
}
}
}

としました。

Answer 1

3項演算子で
A ? B : C : D
という形状になっているため
このエラーが発生していると思われます。

1個の ? で3個分岐しようとした結果
エラーが発生しているため、
1個の ? で2個の分岐になるように組めば
エラーが消えると思われます。

また、遷移先の変数を遷移元と共有する場合
@Buinding を使用する方法があるみたいなので
調べてみることをおすすめします。

import SwiftUI

struct ContentView: View {
    @State var aFolder = ["a1", "a2"]
    @State var bFolder = ["b1", "b2", "b3"]
    @State var cFolder = ["c1", "c2", "c3", "c4"]
    @State var dFolder = ["d1", "d2"]
    var body: some View {
        NavigationView {
            List{
                Section(header: Text("テキスト"))
                {
                    ForEach(0..<4)
                    { index in
                        NavigationLink(destination: ArrayView(row: (index == 0 ? $aFolder : (index == 1 ? $bFolder : (index == 2 ? $cFolder : $dFolder)))), label: index == 0 ?
                                       {folderRow(rowArray: aFolder, rowImageString: "heart", rowTitle: "Like")} : (index == 1 ? {folderRow(rowArray: bFolder, rowImageString: "trash", rowTitle: "Dust")} : (index == 2 ? {folderRow(rowArray: cFolder, rowImageString: "folder", rowTitle: "Folder")} : {folderRow(rowArray: dFolder, rowImageString: "folder", rowTitle: "Folder")})))
                    }
                }
            }
        }
    }
}

struct folderRow: View {
    var rowArray: [String] = []
    var rowImageString = ""
    var rowTitle: String = ""
    var body: some View {
        HStack{
            Image(systemName: rowImageString)
            Text(rowTitle)
            Text("\(rowArray.count)")
        }
    }
}

struct ArrayView: View {
    @Binding var row : [String]
    var body: some View {
        NavigationView {
            List{
                Section(header: Text("テキスト"))
                {
                    ForEach(0..<self.row.count)
                    { index in
                        NavigationLink(destination: AnotherView(row: $row, index: index), label: {Text(row[index])})
                    }
                }
            }
        }
    }
}

struct AnotherView: View {
    @Binding var row: [String]
    var index: Int
    var body: some View {
        TextEditor(text: $row[index])
            .frame(maxWidth: .infinity, maxHeight: .infinity)
    }
}