swiftui

问题 I'm currently getting familiar with SwiftUI and Combine frameworks. And I'm not really getting the difference between these two approaches. When we have to keep track of some data (say, a list of tasks), we can declare a @State variable, and it's change will automatically send notification and update current view. However, it looks like it can also be done this way: class TaskList: ObservableObject{ //a list that's going to be modified and updated on different occasions @Published var list:

问题 I'm currently getting familiar with SwiftUI and Combine frameworks. And I'm not really getting the difference between these two approaches. When we have to keep track of some data (say, a list of tasks), we can declare a @State variable, and it's change will automatically send notification and update current view. However, it looks like it can also be done this way: class TaskList: ObservableObject{ //a list that's going to be modified and updated on different occasions @Published var list:

问题 I'm currently getting familiar with SwiftUI and Combine frameworks. And I'm not really getting the difference between these two approaches. When we have to keep track of some data (say, a list of tasks), we can declare a @State variable, and it's change will automatically send notification and update current view. However, it looks like it can also be done this way: class TaskList: ObservableObject{ //a list that's going to be modified and updated on different occasions @Published var list:

问题 I'm currently getting familiar with SwiftUI and Combine frameworks. And I'm not really getting the difference between these two approaches. When we have to keep track of some data (say, a list of tasks), we can declare a @State variable, and it's change will automatically send notification and update current view. However, it looks like it can also be done this way: class TaskList: ObservableObject{ //a list that's going to be modified and updated on different occasions @Published var list:

问题 I'm currently getting familiar with SwiftUI and Combine frameworks. And I'm not really getting the difference between these two approaches. When we have to keep track of some data (say, a list of tasks), we can declare a @State variable, and it's change will automatically send notification and update current view. However, it looks like it can also be done this way: class TaskList: ObservableObject{ //a list that's going to be modified and updated on different occasions @Published var list:

问题 I'm currently getting familiar with SwiftUI and Combine frameworks. And I'm not really getting the difference between these two approaches. When we have to keep track of some data (say, a list of tasks), we can declare a @State variable, and it's change will automatically send notification and update current view. However, it looks like it can also be done this way: class TaskList: ObservableObject{ //a list that's going to be modified and updated on different occasions @Published var list:

问题 Right now my Widget makes about 1 request per second. I want to change it to 1 request in 1 hour. I get some errors on the line with let timeline = ... like Value of optional type 'Date?' must be unwrapped to a value of type 'Date' and some more. Any suggestions what could be wrong: struct Provider: IntentTimelineProvider { let networkManager = NetworkManager() func placeholder(in context: Context) -> SimpleEntry { SimpleEntry(date: Date(), configuration: ConfigurationIntent(), clubname:

问题 Right now my Widget makes about 1 request per second. I want to change it to 1 request in 1 hour. I get some errors on the line with let timeline = ... like Value of optional type 'Date?' must be unwrapped to a value of type 'Date' and some more. Any suggestions what could be wrong: struct Provider: IntentTimelineProvider { let networkManager = NetworkManager() func placeholder(in context: Context) -> SimpleEntry { SimpleEntry(date: Date(), configuration: ConfigurationIntent(), clubname:

问题 Right now my Widget makes about 1 request per second. I want to change it to 1 request in 1 hour. I get some errors on the line with let timeline = ... like Value of optional type 'Date?' must be unwrapped to a value of type 'Date' and some more. Any suggestions what could be wrong: struct Provider: IntentTimelineProvider { let networkManager = NetworkManager() func placeholder(in context: Context) -> SimpleEntry { SimpleEntry(date: Date(), configuration: ConfigurationIntent(), clubname:

问题 For the purpose of this question, I have provided minimum sample code to re-create the bug. Just copy/paste it to run. import SwiftUI final class Popper: ObservableObject { @Published var shouldProceed: String? = nil var id: String init(id: String) { self.id = id } } struct ContentView: View { @StateObject var popper = Popper(id: "ROOT") var body: some View { NavigationView { VStack(spacing: 40) { Text("You are now in ROOT").font(.largeTitle) Text("Tap Here to goto V1").onTapGesture { popper