标签： navigation

iOS15+

// 自定义的返回按钮，按照你的需求自己定制
struct NavBackButton: View {
    let dismiss: DismissAction
    
    var body: some View {
        Button {
            dismiss()
        } label: {
            Image("...custom back button here")
        }
    }
}

// 在要使用的view下，加入如下modifier
.navigationBarBackButtonHidden(true) // Hide default button
.navigationBarItems(leading: NavBackButton(dismiss: self.dismiss)) // Attach custom button

在引入了上述逻辑后，就会在child view中显示你的自定义的按钮，但同时，左滑返回的手势会失效，如果你需要保留这个手势，则还需要加入如下的代码：

// 让使用自定义返回按钮时，左滑返回的动画不失效，同时对child view是scrollview等也需要监听drag gesture的情况做了兼容
extension UINavigationController: UIGestureRecognizerDelegate {
    override open func viewDidLoad() {
        super.viewDidLoad()
        interactivePopGestureRecognizer?.delegate = self
    }

    public func gestureRecognizerShouldBegin(_ gestureRecognizer: UIGestureRecognizer) -> Bool {
        return viewControllers.count > 1
    }

    // To make it works also with ScrollView
    public func gestureRecognizer(_ gestureRecognizer: UIGestureRecognizer, shouldRecognizeSimultaneouslyWith otherGestureRecognizer: UIGestureRecognizer) -> Bool {
        true
    }
}

iOS15之前

struct SampleDetails: View {
    @Environment(\.presentationMode) var presentationMode: Binding<PresentationMode>

    var btnBack : some View { Button(action: {
        self.presentationMode.wrappedValue.dismiss()
        }) {
            HStack {
            Image("ic_back") // set image here
                .aspectRatio(contentMode: .fit)
                .foregroundColor(.white)
                Text("Go back")
            }
        }
    }
    
    var body: some View {
            List {
                Text("sample code")
        }
        .navigationBarBackButtonHidden(true)
        .navigationBarItems(leading: btnBack)
    }
}