swiftui - 解雇表 SwiftUI

Question

我正在尝试为我的模态表实现一个关闭按钮，如下所示:

struct TestView: View {
    @Environment(\.isPresented) var present
    var body: some View {
        Button("return") {
            self.present?.value = false
        }
    }
}

struct DataTest : View {
    @State var showModal: Bool = false

    var modal: some View {
        TestView()
    }
    var body: some View {
        Button("Present") {
            self.showModal = true
        }.sheet(isPresented: $showModal) {
            self.modal
        }
    }
}

但是点击时返回按钮什么也不做。当显示模态时，控制台中会出现以下内容:

[WindowServer] display_timer_callback: unexpected state (now:5fbd2efe5da4 < expected:5fbd2ff58e89)

如果您强行打开 present你发现它是 nil
我如何解雇 .sheet以编程方式？

Answer 1

使用 presentationMode来自 @Environment .

Beta 6

struct SomeView: View {
    @Environment(\.presentationMode) var presentationMode

    var body: some View {
        VStack {
            Text("Ohay!")
            Button("Close") {
                self.presentationMode.wrappedValue.dismiss()
            }
        }
    }
}