SwiftUI Scrollview 内容在可滚动区域之外

SwiftUI Scrollview contents are outside scrollable area

我无法将 ScrollView 的内容包含在滚动视图中:

最初,我想在 ScrollView 中显示字母 A 和 B,并让用户滚动以查看其他字母。但是,即使我已将父 VStack 限制为高度为 120 的框架,您也可以看到 ScrollView 外部的字母 C(如蓝色背景所示)。这是代码:

var body: some View {            
    VStack(alignment: .leading, spacing: 0) {
         HStack(alignment: .center , spacing: 5) {
             Text("Letter").font(.tableHeader).frame(width: 75, height: 30, alignment: .center)
         } // HStack
         .frame(width: 195, height: 50, alignment: .center)
         .background(Color.green)

         VStack(alignment: .leading, spacing: 0) {
             GeometryReader { outsideProxy in
                 ScrollView (.vertical, showsIndicators: false) {
                     ZStack(alignment: .top) {           
                         GeometryReader { insideProxy in
                             Color.clear
                             // get offset
                         } // GeometryReader inside
                         VStack(alignment: .leading, spacing: 10) {
                             HStack(alignment: .center, spacing: 5){
                                 Text("A").font(.tableData).frame(width: 75, height: 50, alignment: .center)
                             }
                             HStack(alignment: .center, spacing: 5){
                                 Text("B").font(.tableData).frame(width: 75, height: 50, alignment: .center)
                             }
                             HStack(alignment: .center, spacing: 5){
                                 Text("C").font(.tableData).frame(width: 75, height: 50, alignment: .center)
                             }
                             HStack(alignment: .center, spacing: 5){
                                 Text("D").font(.tableData).frame(width: 75, height: 50, alignment: .center)
                             }
                         } // VStack
                     } // ZStack
                 } // Scrollview
             } // GeometryReader outside
             .background(Color.blue)
         } // VStack
         .frame(width: 195, height: 120, alignment: .leading)
     } // VStack
 }

完整代码需要使用 GeometryReader(因此需要使用 ZStack),这就是我在上面的示例中保留这些项目的原因。

解决此问题的最佳方法是什么?对上述布局编码的任何改进持开放态度。请记住,最终,我希望用户能够单击 A、B、C 或 D 以转到导航堆栈中的下一个视图。

剪裁

 ScrollView (.vertical, showsIndicators: false) {
     ZStack(alignment: .top) {           
         GeometryReader { insideProxy in
             Color.clear
             // get offset
         } // GeometryReader inside
         VStack(alignment: .leading, spacing: 10) {
             HStack(alignment: .center, spacing: 5){
                 Text("A").font(.tableData).frame(width: 75, height: 50, alignment: .center)
             }
             HStack(alignment: .center, spacing: 5){
                 Text("B").font(.tableData).frame(width: 75, height: 50, alignment: .center)
             }
             HStack(alignment: .center, spacing: 5){
                 Text("C").font(.tableData).frame(width: 75, height: 50, alignment: .center)
             }
             HStack(alignment: .center, spacing: 5){
                 Text("D").font(.tableData).frame(width: 75, height: 50, alignment: .center)
             }
         } // VStack
     } // ZStack
 } // Scrollview
 .clipped()           // << here !!