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Examples/UINote/SwiftUINote/Views/NoteDetail.swift

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+//
+//  NoteDetail.swift
+//  SwiftUINote
+//
+//  Created by chanju Jeon on 05/06/2019.
+//  Copyright © 2019 we'd. All rights reserved.
+//
+
+import SwiftUI
+
+struct NoteDetail : View {
+    @EnvironmentObject var userData: UserData
+    var note: Note
+    private var text: State<String>
+    
+    init(note: Note) {
+        self.note = note
+        self.text = .init(initialValue: note.text)
+    }
+    
+    var noteIndex: Int {
+        userData.notes.firstIndex(where: { $0.id == note.id })!
+    }
+    
+    var body: some View {
+        VStack {
+            TextField(self.text.binding,
+                      placeholder: nil,
+                      onEditingChanged: { _ in self.updateNote()},
+                      onCommit: {})
+            Spacer()
+        }
+        .padding()
+        .navigationBarTitle(
+            Text(NoteData.dateToString(date: note.date)), displayMode: .inline)
+    }
+    
+    private func updateNote() {
+        self.userData.notes[noteIndex].text = self.text.value
+    }
+}
+
+#if DEBUG
+struct NoteDetail_Previews : PreviewProvider {
+    static var previews: some View {
+        NoteDetail(note: NoteData.shared.notes[0])
+            .environmentObject(UserData())
+    }
+}
+#endif