swiftui

问题 I am struggling to hide the navigationBar , which would properly be hidden if the root controller wasn't a SwiftUI UIHostingController . I tried the following: Setting navigationController.isNavigationBarHidden = true after creating it, at viewDidLoad and viewWillAppear . Adding both .navigationBarHidden(true) and .navigationBarBackButtonHidden(true) for the UIHostingController 's rootView . Could it be an Apple bug? I am using Xcode 11.6. All my attempts together: class LoginController:

问题 I am struggling to hide the navigationBar , which would properly be hidden if the root controller wasn't a SwiftUI UIHostingController . I tried the following: Setting navigationController.isNavigationBarHidden = true after creating it, at viewDidLoad and viewWillAppear . Adding both .navigationBarHidden(true) and .navigationBarBackButtonHidden(true) for the UIHostingController 's rootView . Could it be an Apple bug? I am using Xcode 11.6. All my attempts together: class LoginController:

问题 Normally, I would use an optional variable to hold my Timer reference, as it's nice to be able to invalidate and set it to nil before recreating. I'm trying to use SwiftUI and want to make sure I'm correctly doing so... I declare as: @State var timer:Publishers.Autoconnect<Timer.TimerPublisher>? = nil Later I: self.timer = Timer.publish(every: 1, on: .main, in: .common).autoconnect() To drive a UI text control I use: .onReceive(timer) { time in print("The time is now \(time)") } What is the

问题 Following is a NavigationView, the view pops to Destination2 when long press the NavigationLink and to Destination1 when normally tap it. But the right zone of the NavigationLink in the picture cannot be long pressed. Does anyone know the reason? Thanks! import SwiftUI struct ContentView: View { @State private var isLongPressed = false @State var currentTag: Int? let lyrics = ["OutNotWorkA", "OutNotWorkB", "OutNotWorkC"] var body: some View { NavigationView { List { ForEach(0..<lyrics.count)

问题 I am grabbing a screenshot of a sub-view in my SwiftUI View to immediately pass to a share sheet in order to share the image. The view is of a set of questions from a text array rendered as a stack of cards. I am trying to get a screenshot of the question and make it share-able along with a link to the app (testing with a link to angry birds). I have been able to capture the screenshot using basically Asperi's answer to the below question: How do I render a SwiftUI View that is not at the

问题 I'm trying to update the main view with high frequency data coming from separate background thread. I've created two tabviews and in case of slow update rate I can change the view. But in another case the UI doesn't react. I've observed this behavior only on real device, in the simulator works everything fine. The while loop is still representing an imu, just to keep it simple. Did someone any idea how to fix this issue? Many thanks! import SwiftUI struct ContentView: View {

问题 I'm trying to update the main view with high frequency data coming from separate background thread. I've created two tabviews and in case of slow update rate I can change the view. But in another case the UI doesn't react. I've observed this behavior only on real device, in the simulator works everything fine. The while loop is still representing an imu, just to keep it simple. Did someone any idea how to fix this issue? Many thanks! import SwiftUI struct ContentView: View {

问题 I need to display some text in a SwiftUI Form that will change depending on the current state. However, if the "new" text is longer than the original string displayed when the form first appeared, it won't wrap correctly. In the example below, turning the toggle on changes the text being displayed, but it gets truncated instead of wrapping struct ContentView: View { @State var showLongString = false var body: some View { Form { Section { Text(showLongString ? "This is a string that is too

问题 I need to display some text in a SwiftUI Form that will change depending on the current state. However, if the "new" text is longer than the original string displayed when the form first appeared, it won't wrap correctly. In the example below, turning the toggle on changes the text being displayed, but it gets truncated instead of wrapping struct ContentView: View { @State var showLongString = false var body: some View { Form { Section { Text(showLongString ? "This is a string that is too

问题 I need to display some text in a SwiftUI Form that will change depending on the current state. However, if the "new" text is longer than the original string displayed when the form first appeared, it won't wrap correctly. In the example below, turning the toggle on changes the text being displayed, but it gets truncated instead of wrapping struct ContentView: View { @State var showLongString = false var body: some View { Form { Section { Text(showLongString ? "This is a string that is too