SwiftUI : How to implement SwipGesture?

Question

我想创建一个 UISwipeGestureRecognizer 以便能够在 UIViewRepresentable 中导航。

基本上，用户到达主页后可以向左或向右滑动并将其带到相关 View 。

此外，我只是想注意到我已经做了很多研究，但我没有在 SwiftUI 中看到任何关于 SwipeGesture 的内容(Apple 文档非常简短，没有显示示例)

这是我目前的代码:

struct SheetMenu: View {
    
    @State var currentPage = 0
    
    var body: some View {
        GeometryReader { geo in
            ZStack {
                if self.currentPage == 0 {
                    Text("Page 1")
                }
                else if self.currentPage == 1 {
                    Text("Page 2")
                }
                    
                else if self.currentPage == 2 {
                    Text("Page 3")
                }
                    
                else if self.currentPage == 3 {
                    Text("Page 4")
                }
                    
                else if self.currentPage == 4 {
                    Text("Page 5")
                }
                    
                else if self.currentPage == 5 {
                    Text("Page 6")
                }
                    
                else if self.currentPage == 6 {
                    Text("Page 7")
                }
            }
            .backGroundColor(colorBackGround)
            PageControl(current: self.currentPage)
                .position(x: geo.size.width/2, y: geo.size.height) 
        }
    }
}

struct PageControl : UIViewRepresentable {
    
    var current = 0
    
    func makeUIView(context: UIViewRepresentableContext<PageControl>) -> UIPageControl {
        let page = UIPageControl()
        page.numberOfPages = 7
        page.currentPageIndicatorTintColor = .black
        page.pageIndicatorTintColor = .gray
        return page
    }
    
    func updateUIView(_ uiView: UIPageControl, context: UIViewRepresentableContext<PageControl>) {
        uiView.currentPage = current
    }
}

Answer 1

手势是 View 上的修饰符。您可以通过拖动来假装滑动(您可能需要为手势添加超时)。请注意，我必须扩展您的文本框架，否则手势仅在您位于文本顶部时才能识别:

struct ContentView: View {

  @State var currentPage = 0

  var body: some View {
    GeometryReader { geo in
      PageControl(current: self.currentPage)
        .position(x: geo.size.width/2, y: geo.size.height)
      Text("Page: \(self.currentPage)")
      .frame(maxWidth: .infinity, maxHeight: .infinity)
      .gesture(
        DragGesture()
          .onEnded {
            if $0.translation.width < -100 {
              self.currentPage = max(0, self.currentPage - 1)
            } else if $0.translation.width > 100 {
              self.currentPage = min(6, self.currentPage + 1)
            }
        }
      )
    }
  }
}

struct PageControl : UIViewRepresentable {

  var current = 0

  func makeUIView(context: UIViewRepresentableContext<PageControl>) -> UIPageControl {
    let page = UIPageControl()
    page.numberOfPages = 7
    page.currentPageIndicatorTintColor = .black
    page.pageIndicatorTintColor = .gray
    return page
  }

  func updateUIView(_ uiView: UIPageControl, context: UIViewRepresentableContext<PageControl>) {
    uiView.currentPage = current
  }
}