swiftui - SwiftUI - .onAppear 未触发

Question

我有这个问题，我在循环一些数据，然后在子视图中我从 API 加载一些额外的数据。根据从该 API 返回的数据，我希望逻辑检查是否显示它。

我尝试了不同的解决方案，但似乎无法解决问题。

任何帮助都会很棒。

struct WatchlistGridView: View {
    @Environment(\.horizontalSizeClass) var horizontalSizeClass
    @ObservedObject var watchlistVM = WatchlistViewModel()
    
    @Binding var watchlistData: [WatchlistItemViewModel]
    
    var width: CGFloat = 69 * 2
    var height: CGFloat = 103 * 2
    var cornerRadius: CGFloat = 8
    
    @Binding var showToast: Bool
    @Binding var toastTitle: String?
    @Binding var toastSubTitle: String?
    @Binding var toastImage: String?
    @Binding var toastImageColor: Color?
    
    
    
    var body: some View {
        LazyVGrid(
            columns: [GridItem(.adaptive(minimum: width), spacing: 0)], spacing: 16){
                ForEach(self.watchlistData, id:\.self) { item in
                    
                    SubGridView(item: item)
                       
                }
            }
            .padding(.leading)
            .padding(.trailing)
    }
    
   
}


struct SubGridView: View {
    @ObservedObject var movieLogicState = MovieDetailLogic()
    @State var isLoading: Bool = false
    
    @State var tmdbItem: TMDBItem = TMDBItem()
    
    var item: WatchlistItemViewModel
    
    var body: some View {
        DisplayGridItem(item: item, tmdbItem: tmdbItem)
            .onAppear {
                self.isLoading = true
                movieLogicState.loadMovie(id: item.tmdbId) { result in
                    self.isLoading = false
                    self.tmdbItem = result
                }
            }
    }
}

struct DisplayGridItem: View {
    var item: WatchlistItemViewModel
    var tmdbItem: TMDBItem = TMDBItem()

    var body: some View {
       
        if let releaseDate = tmdbItem.regionFinalReleaseDate {
            if releaseDate > Date() {
                Text("\(releaseDate) | \(Date())")
                Text(tmdbItem.finalTitle)
            }
        }
    }
    
}