自定义用户界面的因素没有更新在LazyVGrid

我已经创建了一个定制的元素我打电话 Slide. 我有一个 LazyVGrid 这就是显示我的 Slide 元素。 我的问题是，当我更新的数据阵列，我的网格是使用， Slide 元素都没有更新。

方案： 用户击的选择上的按钮 Slide 并改变 Slide 颜色，我然后更新的阵列数据但是 Slide 素未更新，尽管数据是正确的(我已经验证了这个加入 Text(slide.color) 进入 LazyVGrid 这显示新设置的颜色如预期)

我的怀疑: 我假设它没有更新，因为我有些东西错了 Slide 结构，我很新SwiftUI所以我学习，因为我走了。 我还必须说，这种负荷，并显示正确，当我第一次显示来看，唯一的问题是，它没有更新，当我更新 SlideStructure.

这里是代码:

struct ShowSongFile : View {
@EnvironmentObject var SlideStructure : SlidesModel
@State var selectedSlide : SplaySlide? = nil
var columns = [GridItem(.adaptive(minimum: 320))]
var body: some View {
    ScrollView {
        LazyVGrid(columns: columns, alignment: .trailing, spacing: 20) {
            ForEach(SlideStructure.SongSlides, id:\.id) { slide in
                if slide.id == selectedSlide?.id {
                    Slide(IsSelected:true, SlideData: slide)
                 
                } else {
                    Slide(IsSelected:false, SlideData: slide)
                        .onTapGesture {
                            selectSlide(Slide: slide)
                        }
                }
            }
        }.onAppear(perform: loadSelectedFile)
    }
}

这里是滑文件，该文件也显示了我是如何设置的颜色幻灯片：

struct Slide : View {
@State var EnableSlideEditing : Bool? = false
@State var IsSelected : Bool = false
@State var SlideData : SplaySlide
@EnvironmentObject var SlideStructure : SlidesModel

var body : some View {
    VStack {
        Group{
            VStack(alignment: .center) {
                let editor = TextEditor(text: $SlideData.lyric)
                    .multilineTextAlignment(.center)
                    .padding()
                let text = Text(SlideData.lyric)
                    .multilineTextAlignment(.center)
                    .frame(width: 320.0, height: 160.0)
                if EnableSlideEditing ?? false {
                    editor
                } else {
                    text
                }
                
                Group {
                    HStack {
                        Text(SlideData.slideType)
                            .padding(.leading, 5.0)
                        Spacer()
                        MenuButton(label: Image(systemName: "ellipsis.circle")) {
                            Button("Edit Slide Text", action: {EnableSlideEditing?.toggle()})
                            Divider()
                            Menu("Slide Type") {
                                Button("Verse", action: {SlideType(Type: "Verse", ColorHex: "#f57242")})
                                Button("Chorus", action: {SlideType(Type: "Chorus", ColorHex: "#0068bd")})
                                Button("Pre-Chorus", action: {SlideType(Type: "Pre-Chorus", ColorHex: "#02ad96")})
                                Button("Tag", action: {SlideType(Type: "Tag", ColorHex: "#ad027d")})
                                Button("Bridge", action: {SlideType(Type: "Bridge", ColorHex: "#02ad96")})
                            }
                            Menu("Transitions") {
                                Button("Option 1", action: {})
                                Button("Option 2", action: {})
                            }
                            Divider()
                            Button("Delete Slide", action: {})
                            Button("Duplicate Slide", action: {})
                        }
                        .menuButtonStyle(BorderlessButtonMenuButtonStyle())
                        .frame(alignment: .trailing)
                        .padding(.trailing, 5.0)
                        .buttonStyle(PlainButtonStyle())
                    }
                }
                .frame(width: 320, height: 20, alignment: .leading)
                .background(Color.init(hex: SlideData.slideBorderColorHex))
            }
        }
        .frame(width: 320, height: 180, alignment: .bottomLeading)
        .background(IsSelected ? Color.accentColor : .black)
        .cornerRadius(10)
    }
}

func SlideType(Type:String, ColorHex: String) {
    for (index, slide) in SlideStructure.SongSlides.enumerated() {
        if slide.id == self.SlideData.id {
            SlideStructure.SongSlides[index].slideBorderColorHex = ColorHex
            SlideStructure.SongSlides[index].slideType = Type
            ShowSongFile.main?.SongFile.slides = SlideStructure.SongSlides
            ShowSongFile.main!.SongFile.SaveSongToDisk()
          }
      }
   }
}

SlideStructure:(SlideModel)

class SlidesModel : ObservableObject {
@Published var SongSlides : [SplaySlide] = []
}