You can use the isActive parameter of NavigationLink to bind a property and trigger the push changing the property value to true:
struct ContentView: View {
@State private var isActive = false
var body: some View {
NavigationView {
VStack {
Button("Present") {
isActive = true
}
NavigationLink(destination: Color.red, isActive: $isActive) { }
}
}
}
}
I'm using a Button action to change the value but you can do it in the error handling for example.
mtsrodrigues
Users receive reputation points by contributing quality content to the forums.
Posts include post and replies published on the forums.
Post authors can mark replies as Accepted to indicate successful solutions.
Apple Developer Forums admins can mark replies as Apple Recommended to indicate an approved solution
Last seen
User for
Post
Replies
Boosts
Views
Activity
You can also use the @UIApplicationDelegateAdaptor property wrapper if you prefer the UIKit way.
@main
struct SampleApp: App {
@UIApplicationDelegateAdaptor var delegate: AppDelegate
var body: some Scene {
WindowGroup {
ContentView()
}
}
}
class AppDelegate: NSObject, UIApplicationDelegate {
func application(_ application: UIApplication, didFinishLaunchingWithOptions launchOptions: [UIApplication.LaunchOptionsKey : Any]? = nil) -> Bool {
print(#function)
return true
}
}
The problem is the fact that in your code you end up with repeated identifiers and I believe that LazyVStack requires the ids to be unique. I managed to make it work using a UUID as an identifier:
struct ContentView: View {
var body: some View {
ScrollView {
LazyVStack{
ForEach(0...2, id: \.self) { section in
Section {
ForEach(0..<2) { item in
Text("Section: \(section), Item: \(item)")
.id(UUID())
}
}
}
}
}
}
}
When a sample code is appearing in the video there is a button available in the upper left corner to copy the code to clipboard.
You can achieve this using the .fullScreenCover modifier as in the following example:
import SwiftUI
struct ContentView: View {
@State private var isPresented = false
var body: some View {
Button("Present") {
isPresented.toggle()
}
.fullScreenCover(isPresented: $isPresented) {
ModalView()
}
}
}
struct ModalView: View {
@Environment(\.presentationMode) var presentationMode
var body: some View {
Button("Dismiss") {
presentationMode.wrappedValue.dismiss()
}
.frame(maxWidth: .infinity, maxHeight: .infinity)
.background(Color.red)
.foregroundColor(Color.white)
.edgesIgnoringSafeArea(.all)
}
}
I've noticed this too and I believe it’s because Label is made to be used in specific places, like in a tab item.
You can get the position by using GeometryReader to read the scrollView content frame, pass the value using PreferenceKey and observe it:
struct ContentView: View {
var body: some View {
ScrollView {
ZStack {
LazyVStack {
ForEach(0...100, id: \.self) { index in
Text("Row \(index)")
}
}
GeometryReader { proxy in
let offset = proxy.frame(in: .named("scroll")).minY
Color.clear.preference(key: ScrollViewOffsetPreferenceKey.self, value: offset)
}
}
}
.coordinateSpace(name: "scroll")
.onPreferenceChange(ScrollViewOffsetPreferenceKey.self) { value in
print(value)
}
}
}
The .frame(in: .named("scroll")) is required to get the frame relative to the ScrollView and obtain a 0 offset when at the top, without the height of the safe area. If you try using .frame(in: .global) you will get a non-zero value when the scroll view is at the top (20 or 44, depends on the device).
ScrollViewReader actually provides a ScrollViewProxy with a function scrollTo(_ id:, anchor:) that you can use to scroll to the position of a View related to a given id:
struct ContentView: View {
@State private var position = 0
var body: some View {
VStack {
HStack {
Button("Top") { position = 0 }
Button("Middle") { position = 500 }
Button("Bottom") { position = 1000 }
}
ScrollView {
ScrollViewReader { proxy in
LazyVStack {
ForEach(0...1000, id: \.self) { index in
Text("Row \(index)")
}
}
.onChange(of: position) { value in
withAnimation {
proxy.scrollTo(value, anchor: .center)
}
}
}
}
}
}
}