Xcode生成“分段错误: 11”编译

Question

编译以下代码时，Xcode版本11.3.1 (11C504)抛出：

错误:分割错误: 11 (项目'TestDel3‘中的目标'TestDel3')

如果我注释掉Image(systemName: systemName)并用Image(systemName: "person")替换它，它会编译

struct ContentView: View{
  var body: some View {
    UseButtonContainer( b: ButtonContainer("x1",systemName:"person") {print("c1")})
  }
}

struct UseButtonContainer: View{
  let b : ButtonContainer
  var body: some View {
    Button(action: {
      self.b.action();
      self.extraAction()
    }) { b.label}
  }

  func extraAction()->Void{
    print("extra action")
  }
}

struct ButtonContainer{
  let label: VStack<TupleView<(Image, Text)>>
  let action: ()-> Void

  init(_ text: String, systemName: String, action: @escaping ()-> Void){
    self.label = VStack{
      Image(systemName: systemName)     // Commenting out this line
      //Image(systemName: "person")     // and using this instead, it compiles
      Text(text)
    }
    self.action = action
  }
}

What's wrong here?

Answer 1

更新：以下变体工作

struct ButtonContainer{
  let label: VStack<TupleView<(Image, Text)>>
  let action: ()-> Void

  init(_ text: String, systemName: String, action: @escaping ()-> Void){
    self.label = VStack {
      Image(systemName: "\(systemName)") // << make it string literal !!!
      Text(text)
    }
    self.action = action
  }
}

初始值(以防万一)：

考虑到SwiftUI几乎通过some View在任何地方使用不透明类型，为label编译并运行良好的擦除类型的方法(用Xcode 11.3.1 / iOS 13.3测试)。我不确定你是否需要在这里有明确的类型，但请注意。

struct ButtonContainer{
  let label: AnyView
  let action: ()-> Void

  init(_ text: String, systemName: String, action: @escaping ()-> Void){
    self.label = AnyView(VStack {
      Image(systemName: systemName)
      Text(text)
    })
    self.action = action
  }
}