Solved! Problem and Expectation SwiftUI uses a UINavigationController under the hood. So, if I push a UIViewController onto a SwiftUI NavigationView using UIViewControllerRepresentable, then I would expect the navigation item and toolbar items of that view controller to be used by said navigation controller. As I mention above, they are ignored. Root Cause It turns … Read more
For ObservableObject the pairing ObservedObject makes view refresh, so to solve the task in question I would recommend the following approach: Demo Code import SwiftUI import Combine class Sport: ObservableObject, Hashable, Identifiable { static func == (lhs: Sport, rhs: Sport) -> Bool { lhs.name == rhs.name && lhs.isFavorite == rhs.isFavorite && lhs.school == rhs.school } … Read more
Instead of didSet you can always use onReceive (iOS 13+) or onChange (iOS 14+): import Combine import SwiftUI struct ContentView: View { @State private var counter = 1 var body: some View { ChildView(counter: $counter) Button(“Increment”) { counter += 1 } } } struct ChildView: View { @Binding var counter: Int var body: some View … Read more
Here is possible approach. For TabView it gives the same behaviour as tapping to the another tab and back, so gives persistent look & feel. Tested & works with Xcode 11.2 / iOS 13.2 Full module code: import SwiftUI struct TestPopToRootInTab: View { @State private var selection = 0 @State private var resetNavigationID = UUID() … Read more
Usually you want to either have a common behaviour or a common style. 1) To have a common behaviour: composition with generics Let’s say we need to create a BgView which is a View with a full screen image as background. We want to reuse BgView whenever we want. You can design this situation this … Read more
The Apple way Investigating on the view hierarchy shows that Apple is using UIKit and UIVisualEffectViewfor this reason. You can define a VisualEffectView with just 5 lines of code: struct VisualEffectView: UIViewRepresentable { var effect: UIVisualEffect? func makeUIView(context: UIViewRepresentableContext<Self>) -> UIVisualEffectView { UIVisualEffectView() } func updateUIView(_ uiView: UIVisualEffectView, context: UIViewRepresentableContext<Self>) { uiView.effect = effect } … Read more
The log is generated by (from private AttributeGraph.framework) AG::Graph::print_cycle(unsigned int) const () so you can set symbolic breakpoint for print_cycle and, well, how much it could be helpful depends on your scenario, but definitely you’ll get error generated stack in Xcode.