优化数据结构，减少内存

Author: ming1016

SwiftPamphletApp/InfoOrganizer/Category/CategoryListView.swift

@@ -13,10 +13,6 @@ struct CategoryListView: View {
     @Environment(\.modelContext) var modelContext
     @Query(IOCategory.allOrderByName) var cates: [IOCategory]
     @State var selectCate: IOCategory?
-    @State var catesByCount: [IOCategory] = [IOCategory]()
-    
-    @State var maxCount: Int = 0
-    @State var averageCount: Int = 0
 
     let linearGradient = LinearGradient(gradient: Gradient(colors: [Color.pink.opacity(0.8), Color.pink.opacity(0.01)]),
                                         startPoint: .top,
@@ -32,79 +28,9 @@ struct CategoryListView: View {
                 }
             }
         }
-        GroupBox("分类排序") {
-            Chart(catesByCount) { cate in
-                BarMark(
-                    x: .value("名字", cate.name),
-                    y: .value("数量", cate.infos?.count ?? 0)
-                )
-                .foregroundStyle(linearGradient)
-//                .interpolationMethod(.catmullRom) // 设置曲线啥的
-                .annotation(position: .overlay, alignment: .top, spacing: 3) {
-                    VStack {
-                        Text("\(cate.infos?.count ?? 0)")
-                            .font(.footnote)
-                            .foregroundColor(light: .white, dark: .white)
-                            .padding(EdgeInsets(top: 0, leading: 0, bottom: 10, trailing: 0))
-                        Text(cate.name)
-                            .font(.footnote)
-                            .foregroundColor(light: .white, dark: .white)
-                            .rotationEffect(.degrees(45))
-//                            .fixedSize(horizontal: false, vertical: true)
-                            
-                    }
-                }
-                RuleMark(y: .value("均线", averageCount))
-                    .foregroundStyle(Color.secondary)
-                    .lineStyle(StrokeStyle(lineWidth: 0.8, dash: [10]))
-                    .annotation(alignment: .topLeading) {
-                        Text("均线:\(averageCount)")
-                            .font(.footnote).bold()
-                            .padding(.trailing, 32)
-                            .foregroundStyle(Color.secondary)
-                    }
-//                SectorMark(angle: .value("数量", cate.infos?.count ?? 0), innerRadius: .ratio(0.5),
-//                           angularInset: 1.5)
-//                    .foregroundStyle(by: .value("名字", cate.name))
-//                    .annotation(position: .overlay, alignment: .trailing, spacing: 3) {
-//                        Text(cate.name)
-//                            .font(.footnote)
-//                            .foregroundColor(light: .white, dark: .white)
-//                    }
-            }
-//            .chartYScale(domain: 0...maxCount)
-            .aspectRatio(1, contentMode: .fit)
-//            .chartLegend(.hidden)
-//            .chartXAxis(.hidden)
-            .chartScrollableAxes(.horizontal)
-//            .chartScrollPosition(initialY: 8)
-//            .chartXVisibleDomain(length: 5) // 调整可见数据点数
-//            .chartYAxis(.hidden)
-            
-        }
-        .onAppear(perform: {
-            sortCates()
-        })
-        .onChange(of: cates) { oldValue, newValue in
-            sortCates()
-        }
+
     }
 
-    func sortCates() {
-        catesByCount = cates.sorted(by: { l, r in
-            l.infos?.count ?? 0 > r.infos?.count ?? 0
-        })
-        
-        // 找出最大
-        var cateCounts = [Int]()
-        for cate in cates {
-            if let cateCount = cate.infos?.count {
-                cateCounts.append(cateCount)
-            }
-        }
-        maxCount = cateCounts.max() ?? 0
-        let sum = cateCounts.reduce(0, +)
-        averageCount = Int(Double(sum) / Double(cateCounts.count))
-    }
+
 }
 

SwiftPamphletApp/InfoOrganizer/Category/CategoryRowView.swift

@@ -22,7 +22,6 @@ struct CategoryRowView: View {
             }
             TextField("name", text: $cate.name)
             Spacer()
-            Text("\(cate.infos?.count ?? 0)")
         }
         .swipeActions {
             Button {

SwiftPamphletApp/InfoOrganizer/Info/EditInfoView.swift

@@ -147,7 +147,7 @@ struct EditInfoView: View {
             } // end form
             .padding(10)
             .inspector(isPresented: $isShowInspector) {
-                EditCategoryView(cate: cate ?? IOCategory(name: "unavailable.com", infos: [IOInfo](), pin: 0, createDate: Date.now, updateDate: Date.now))
+                EditCategoryView(cate: cate ?? IOCategory(name: "unavailable.com", pin: 0, createDate: Date.now, updateDate: Date.now))
             }
             .toolbar {
                 Button("关闭", systemImage: "sidebar.right") {
@@ -166,7 +166,7 @@ struct EditInfoView: View {
         }
     }
     func addCate() {
-        cate = IOCategory(name: "", infos: [IOInfo](), pin: 0, createDate: Date.now, updateDate: Date.now)
+        cate = IOCategory(name: "", pin: 0, createDate: Date.now, updateDate: Date.now)
         modelContext.insert(cate!)
         isShowInspector = true
     }

SwiftPamphletApp/InfoOrganizer/Model/InfoDataModel.swift

@@ -49,20 +49,17 @@ final class IOInfo {
 @Model
 class IOCategory {
     var name: String = ""
-    var infos: [IOInfo]? = [IOInfo]() // 关系字段，链接 IOInfo
     var pin: Int = 0
 
     var createDate: Date = Date.now
     var updateDate: Date = Date.now
 
     init(name: String,
-         infos: [IOInfo]?,
          pin: Int,
          createDate: Date,
          updateDate: Date
     ) {
         self.name = name
-        self.infos = [IOInfo]()
         self.pin = pin
         self.createDate = createDate
         self.updateDate = updateDate
@@ -76,10 +73,6 @@ class IOCategory {
         let fd = FetchDescriptor(sortBy: [SortDescriptor(\IOCategory.pin, order: .reverse), SortDescriptor(\IOCategory.name, order: .forward)])
         return fd
     }
-    static var allOrderByCount: FetchDescriptor<IOCategory> {
-        let fd = FetchDescriptor(sortBy: [SortDescriptor(\IOCategory.infos?.capacity, order: .reverse)])
-        return fd
-    }
 
     static func pin(_ cate: IOCategory) {
         if cate.modelContext != nil {