swiftui - 如何在父 View 使用 IgnoringSafeArea() 时访问 safeArea 插图

Question

如您所见，我想将搜索栏恰好放在 safeArea 的顶部，但是 proxy.safeAreaInsets 没有正确的值，因为在PreviewProvider 父级使用 edgesIgnoringSafeArea。

我能做什么？有什么方法可以访问 safeAreaInsets 吗？

struct FindView: View {
  
  // MARK: -  Properties
  @ObservedObject var viewModel: FindViewModel
  
  init(viewModel: FindViewModel){
    self.viewModel = viewModel

  }
  
  var body: some View {
 
      GeometryReader { proxy in
        ScrollView(.vertical, showsIndicators: true, content: {
          VStack(alignment: .leading, spacing: 8){
             SearchBar()
              .frame(height: 48, alignment: .center)
              .padding(.all, 16)
              
            
            Text("Categories")
              .multilineTextAlignment(.leading)
              .font(.system(size: 21))
              .padding(.all, 16)
              
          }.frame(width: proxy.size.width)
        })
      }
  }
}

struct FindView_Previews: PreviewProvider {
  static var previews: some View {
    ZStack(alignment: .center, content: {
      Rectangle().foregroundColor(.red)
      FindView(viewModel: FindViewModel())
    }).edgesIgnoringSafeArea(.all)
  }
}

Answer 1

简单的方法；

     struct test: View {
          var body: some View {
              VStack{
                Text("Your view comes here")
                Spacer()
              }
               .frame(minWidth:0, maxWidth: .infinity, minHeight: 0,maxHeight: .infinity, alignment: .center)
               .padding(.top,UIApplication.shared.windows.first?.safeAreaInsets.top ?? 40)
               .background(Color.red)
               .edgesIgnoringSafeArea(.all)
          }
      }