SWiftUI 随手笔记 Navigation Push/Sho

SWiftUI中使用NavigationLink来进行show detail，push和pop

首先看下show detail

struct ContentView: View {
    var body: some View {
        NavigationView {
            NavigationLink("Tap me", destination: DetailView())
            .navigationBarTitle("Master")
        }
    }
}

struct DetailView: View {
    var body: some View {
        Text("This is detail view")
        .navigationBarTitle("Detail")
    }
}

在Master-Detail 模式下 NavigationLink默认就是 showDetail

如果我们想从Detail push 到下一个页面，需要手动调用isDetailLink() api, 代码如下

struct DetailView: View {
    var body: some View {
        VStack {
            Text("This is detail view")
            NavigationLink("Tap me to next page", destination: DetailChildView()).isDetailLink(false)
        }
        .navigationBarTitle("Detail")
    }
}

struct DetailChildView: View {
    var body: some View {
        Text("This is detail view")
        .navigationBarTitle("This is detail view")
    }
}

这里要注意的是必须要手动调isDetailLink(false), 文档提示默认是true

/// Sets whether or not the `NavigationLink` should present its destination
/// as the "detail" component of the containing `NavigationView`.
///
/// If not set, defaults to `true`.
public func isDetailLink(_ isDetailLink: Bool) -> some View

如果调用这个api，那么默认是showDetail，当前的DetailView会被直接替换成DetailChildView而不是Push，并且没有动画，也无法返回