navigationlink

问题 Since NavigationButton isn't available anymore, how do I check conditions in NavigationLink in order to navigate to another view? NavigationLink(destination: Dashboard(userName: self.userId, password: self.password), isActive: $showDashboard) { Button(action: { if self.userId.isEmpty || self.password.isEmpty { self.isAlert = true } else { self.showDashboard = true } }) { Text("Submit") .foregroundColor(.white) .font(.system(size: 22)) Dashboard() } .frame(minWidth: 150, idealWidth: 300,

问题 Since NavigationButton isn't available anymore, how do I check conditions in NavigationLink in order to navigate to another view? NavigationLink(destination: Dashboard(userName: self.userId, password: self.password), isActive: $showDashboard) { Button(action: { if self.userId.isEmpty || self.password.isEmpty { self.isAlert = true } else { self.showDashboard = true } }) { Text("Submit") .foregroundColor(.white) .font(.system(size: 22)) Dashboard() } .frame(minWidth: 150, idealWidth: 300,

问题 I am looking for some guidance with SwiftUI please. I have a view showing a simple list with each row displaying a "name" string. You can add items to the array/list by clicking on the trailing navigation bar button. This works fine. I would now like to use NavigationLink to present a new "DetailView" in which I can edit the row's "name" string. I'm struggling with how to use a binding in the detailview to update the name. I've found plenty of tutorials online on how to present data in the

问题 I am looking for some guidance with SwiftUI please. I have a view showing a simple list with each row displaying a "name" string. You can add items to the array/list by clicking on the trailing navigation bar button. This works fine. I would now like to use NavigationLink to present a new "DetailView" in which I can edit the row's "name" string. I'm struggling with how to use a binding in the detailview to update the name. I've found plenty of tutorials online on how to present data in the

问题 I’m using SwfitUI in my project and I have a NavigationView and List. I’m clicking cell after open the detail view and click navigation back button. I want to remove view (it’s struct, in SwiftUI) after click navigation back button. Because if I click the same cell or button again, it isn’t initialize new view, it’s shows old view. I want to do refresh this view. How do I do? My FirstView Struct is: struct FirstView: View { @ObservedObject var viewModel: FirstViewModel var body: some View {

问题 I'm looking for a way to display a view in my WatchOS application "one level in" from the NavigationView on app startup if certain conditions are met. I want the same effect as if I would have pressed a NavigationLink myself, i.e being able to go back to the NavigationView again, which is not possible if I choose to display the desired view right away. "navigationBarItems" is also not available for WatchOS which makes it impossible to navigate backwards without actually clicking the

问题 I just want to stop the animation when I have a multi List in multi-level NavigationView. Maybe this is not "ANIMATION", I just want to fix that. On Xcode Version 11.3.1 (11C504) + iOS 13.2 The code is simple and you can find out it's wired. import SwiftUI struct TestView: View { var body: some View { NavigationView { List { ForEach(1...4, id: \.self) {_ in NavigationLink(destination: AView()) { Text("root") } } } } } } struct AView: View { var body: some View { List { ForEach(1...4, id: \

问题 I have a view BugSplitView which works fine alone but causes a precondition failure: attribute failed to set an initial value error when navigated to in either preview or the simulator. The view has an upper part (Color) and a lower part (Color) separated by a horizontal button bar and laid out using the GeometeryReader and a split state. When it is the destination of NavigationButton it doesn't show properly in the Preview and reports the assertion above when run in the simulator. Remove the

问题 How I can make custom overlay over List row that will highlight it on tap. I am using NaviagationLink and I've changed UITableViewCell.appearance().cellSelectionStyle = .none in order to not use default gray selection. I've tried to add some @State isSelected to my Cell but I do not know how/when to change this to get this affect. I've tried to add onTapGesture() but it prevents NavigationLink, and doesn't provide begin, ended states, just ended. 回答1: I do it this way: List { ForEach(0..<self

问题 I was working on an application with login and after login there are categories listed. And under each category there are some items listed horizontally. The thing is after login, main page appears and everything is listed great. When you click on an item it goes to detailed screen but when you try to go back it just crashes. I found this flow Why does my SwiftUI app crash when navigating backwards after placing a `NavigationLink` inside of a `navigationBarItems` in a `NavigationView`? but i