Question

我使用的是经典数组：[struct]模型如下：

struct ContentView: View {

    @State var showNewCardView = false

    var MirleftCards: [mirleftCard] = [
        mirleftCard(image: Image("beach"), title: "The Beach", description: "The amazing view of the Grande Plage"),
        mirleftCard(image: Image("sea"), title: "The Sea", description: "The amazing view of the sea"),
    ]

    var body: some View {
        NavigationView{
            ScrollView {
                ForEach(MirleftCards, id: \.id) { card in
                    CardView(card_image: card.image, card_title: card.title, card_description: card.description)
                }
           }
      }
}

原始结构如下：

struct mirleftCards: Identifiable {
      var id = UUID()
      var image: Image
      var title: String
      var description: String
}

我有一个.sheet编辑器，可让您上传图片并添加标题和说明：

class NewCardData: ObservableObject {
    @Published var title = ""
    @Published var description = ""
}
struct NewCardView: View {

    @ObservedObject var newCardData = NewCardData()
    @State var image:UIImage?

var body: some View {
                if image != nil {
                    Image(uiImage: image!)
                        .resizable()
                        .scaledToFit()
                        .clipShape(RoundedRectangle(cornerRadius: 20))
                        .overlay(TextField("Title", text: $newCardData.title)
                        .overlay(TextField("Description", text: $newCardData.description)
                       }
          }
}

我的问题是，当用户选择图像并输入标题和描述时，如何将这些数据自动发送到供ForEach循环使用的数组中？

谢谢！

Answer 1

您可以按照here所述将卡阵列用作@EnvironmentObject。然后，您可以从两个视图访问该数组，因此只需从NewCardView附加它即可。

因此，在SceneDelegate中，您需要添加

var MirleftCards: [mirleftCard] = [
    mirleftCard(image: Image("beach"), title: "The Beach", description: "The amazing view of the Grande Plage"),
    mirleftCard(image: Image("sea"), title: "The Sea", description: "The amazing view of the sea"),
]

进一步，更改

let contentView = ContentView()

到让contentView = ContentView（）。environmentObject（MirleftCards）

从现在开始，您可以从每个视图访问此变量。只需添加

@EnvironmentObject var MirleftCards: [mirleftCard]

在两个视图中

到视图结构，然后从工作表中添加新卡。然后应自动更新ContentView。

将数据传递到数组中：[struct]传递到ForEach循环（SwiftUI）

1 个答案: