Your Second iOS & SwiftUI App

Nov 4 2021 · Swift 5.5, iOS 15, Xcode 13

Part 3: Managing Rows

22. Challenge: New Book Sheet

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So! You’ve got a view that says “Add New Book”! Alas, it doesn’t actually do that. Yet!

@Published var 
@Published var 

class Book: ObservableObject {
  @Published var title: String
  @Published var author: String
  @Published var microReview: String

struct NewBookView: View {
  var book = Book(title: "", author: "")

  var body: some View {

@ObservedObject var book = Book(title: "", author: "")

  var body: some View {
    VStack {
      
    }
  }

    VStack {
      TextField("Title", text: $book.title)
    }

      TextField("Title", text: $book.title)
      TextField("Author", text: $book.author)
    }

    })
    .padding()
  }

      }

      ReviewAndImageStack()

      Spacer()

      }

      ReviewAndImageStack()
    }

        updateButton
      }

      Spacer()
    }

      ReviewAndImageStack()
    }
    .padding()
  }
}

      Spacer()
    }
    .sheet(isPresented: $showingImagePicker) {
      PHPickerViewController.View(image: $image)
    }
    .confirmationDialog(isPresented: $showingAlert) {
    }
  }
}

  @Binding var image: UIImage?

  var body: some View {

struct ReviewAndImageStack: View {
  @State var showingImagePicker = false
  @State var showingDialog = false

  var body: some View {

struct ReviewAndImageStack: View {
  @ObservedObject var book: Book
  @Binding var image: UIImage?
  @State var showingImagePicker = false

ReviewAndImageStack(book: book, image: $image)

/// THE SOFTWARE.

import class PhotosUI.PHPickerViewController
import SwiftUI

ReviewAndImageStack(book: .init(), image: .constant(nil)

    ReviewAndImageStack(book: .init(), image: .constant(nil))
      .padding(.horizontal)
  }

      .padding(.horizontal)
      .previewedInAllColorSchemes
  }

  @ObservedObject var book = Book(title: "", author: "")
  @State var image: Image? = nil

  var body: some View {

      TextField("Author", text: $book.author)
      ReviewAndImageStack(book: book, image: $image)
    })

VStack(spacing: 24, content: {

struct ContentView: View {
  @State var addingNewBook = false
  @State var library = Library()

        Button {
          addingNewBook = true
        } label: {

        .padding(.vertical, 8)
        .sheet(isPresented: /*@START_MENU_TOKEN@*//*@PLACEHOLDER=Is Presented@*/.constant(false)/*@END_MENU_TOKEN@*/, content: {
          /*@START_MENU_TOKEN@*//*@PLACEHOLDER=Content@*/Text("Sheet Content")/*@END_MENU_TOKEN@*/
        })

        ForEach(library.sortedBooks) { book in

.sheet(isPresented: $addingNewBook, content: {

        .sheet(
          isPresented: $addingNewBook,
          content: NewBookView.init
        )

        ForEach(library.sortedBooks) { book in