swiftui

Semi-transparent (blurry like VisualEffectView) of the view behind the current view

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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

SwiftUI – make sure to publish values from the main thread (via operators like receive(on:)) on model updates

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Just put @MainActor before defining your class that is supposed to act in the main thread. And it’s so simple in terms of using new Swift concurrency. @MainActor class DocumentsViewModel: ObservableObject { … } There’s a lot of information about that in new WWDC 2021 videos or articles like that: Using the MainActor attribute to … Read more

How to detect whether targetEnvironment is iPadOS in SwiftUI?

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I use this in my code: private var idiom : UIUserInterfaceIdiom { UIDevice.current.userInterfaceIdiom } private var isPortrait : Bool { UIDevice.current.orientation.isPortrait } Then you can do this: var body: some View { NavigationView { masterView() if isPortrait { portraitDetailView() } else { landscapeDetailView() } } } private func portraitDetailView() -> some View { if idiom … Read more

Remove top padding from List

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Firstly, I would say that GroupedListStyle is working as intended. On iOS, the grouped list style displays a larger header and footer than the plain style, which visually distances the members of different sections. You say you have tried this, but it does work for me (Xcode 12.5.1): List { … } .onAppear(perform: { UITableView.appearance().contentInset.top … Read more

How to create a simple Binding for previews

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You can use .constant(VALUE) in your Previews, no need to create a @State. /// A value and a means to mutate it. @propertyWrapper public struct Binding<Value> { /// Creates a binding with an immutable `value`. public static func constant(_ value: Value) -> Binding<Value> } e.g. TestView(someProperty: .constant(5.0))

Mysterious spacing or padding in elements in a VStack in a ScrollView in SwiftUI

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If I understand your ultimate goal, it’s to have each row bordered above by a dotted line, with no padding between them, like this: In that case, IMO you should put the lines in a background. For example: ScrollView { VStack(alignment: .leading) { ForEach(self.elements, id: \.self) { element in HStack { Text(“\(element.index+1)”) .font(.system(.caption, design: .rounded)) … Read more

How to disable NavigationView push and pop animations

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Xcode 11.3: Right now there is no modifier to disable NavigationView animations. You can use your struct init() to disable animations, as below: struct ContentView : View { init(){ UINavigationBar.setAnimationsEnabled(false) } var body: some View { NavigationView { VStack { NavigationLink(“Push Me”, destination: Text(“PUSHED VIEW”)) } } } }

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