SwiftUI:NavigationBarItem前导未显示
有了这段代码,为什么navigationBarItem不显示? 视图在图纸中被调用,但这在以前并不重要SwiftUI:NavigationBarItem前导未显示,swift,swiftui,swiftui-navigationlink,Swift,Swiftui,Swiftui Navigationlink,有了这段代码,为什么navigationBarItem不显示? 视图在图纸中被调用,但这在以前并不重要 struct ChangePasswordView: View { @Environment(\.presentationMode) private var presentationMode @State private var passwordNew = "" @State private var passwordNewAgain = "" var bod
struct ChangePasswordView: View {
@Environment(\.presentationMode) private var presentationMode
@State private var passwordNew = ""
@State private var passwordNewAgain = ""
var body: some View {
ScrollView {
changePassword
}
.navigationBarItems(leading: backButton)
.navigationBarItems(trailing: finishButton)
}
var backButton: some View {
Button(action: { self.presentationMode.wrappedValue.dismiss() }) {
Text("Cancel")
}
}
var finishButton: some View {
Button(action: {
self.changePasswordGlobally()
self.presentationMode.wrappedValue.dismiss()
}) {
Text("Apply")
}
.disabled(self.passwordNew.isEmpty || self.passwordNew != self.passwordNewAgain)
.disableAutocorrection(true)
}
}
正如您在以下屏幕截图中所看到的,应该处于领先位置的navigationBarItem不会显示:
对于两个辅助项,请使用此变体(使用Xcode 11.2/iOS 13.2进行测试):
可以确认,两次调用
navigationBarItems
一次用于前导,一次用于尾随,这样做不起作用!
ScrollView {
changePassword
}
.navigationBarItems(leading: backButton, trailing: finishButton)