SwifUI根据条件更新navigationBarItems标题

Question

我喜欢更新一个基于特定条件的navigationBarItems标题，我正在使用以下代码。

此处当前页面状态正在更新，但navigationBarItems标题未更新。

@State private var currentPage = 0
var pages: [MyPage]

var body: some View {
    ZStack(alignment: .bottom) {
          //Here current page value is getting updated
       PageView(currentPage: $currentPage)
    }
    .navigationBarItems(trailing: Text(currentPage == pages.count ? "Done" : "Skip"))
}

Answer 1

您必须使用total count - 1，请尝试以下代码

 @State private var currentPage = 0

 var pages: [MyPage]

    var body: some View {
        ZStack(alignment: .bottom) {
              //Here current page value is getting updated
           PageView(currentPage: $currentPage)
        }
        .navigationBarItems(trailing: Text(currentPage == pages.count - 1 ? "Done" : "Skip"))
    }