Swift & SwiftUI delay code All In One

solutions

DispatchQueue.main.asyncAfter

    .onAppear() {
      /*
       */
      self.animate = false;
      DispatchQueue.main.asyncAfter(deadline: .now() + 1) {
        // ?
        self.animate = true;
        // self.animate.toggle();
        // print("Async after 1 seconds");
      }
      // self.animate.toggle();
      // self.animate = false;
      // sleep(UInt32(1.0));
      // self.animate = true;
      // sleep(1.0);
      // Cannot convert value of type 'Double' to expected argument type 'UInt32'
      // Replace '1.0' with 'UInt32(1.0)'
      // delay
      // Text("").task(self.delay);
      // Converting non-sendable function value to '@Sendable () async -> Void' may introduce data races
      // Result of call to 'task(priority:_:)' is unused
      // self.delay();
      // ? 'async' call in a function that does not support concurrency
    }
    .onDisappear() {
      // self.animate.toggle();
      // self.animate = false;
    }

print("Before delay")
DispatchQueue.main.asyncAfter(deadline: .now() + 2) {
    print("Async after 2 seconds")
}


print("Before delay")
DispatchQueue.main.asyncAfter(deadline: .now() + .milliseconds(500)) {
    print("async after 500 milliseconds")
}

task

struct ContentView: View {
    @State private var hasTimeElapsed = false

    var body: some View {
        Text(hasTimeElapsed ? "Sorry, too late." : "Please enter above.")
            .task(delayText)
    }

    private func delayText() async {
        // Delay of 7.5 seconds (1 second = 1_000_000_000 nanoseconds)
        try? await Task.sleep(nanoseconds: 7_500_000_000)
        hasTimeElapsed = true
    }
}

perform

perform(#selector(authenticate), with: nil, afterDelay: 1)

sleep

print("Before delay")
sleep(1.0)
print("After delayed")

refs

https://programmingwithswift.com/how-to-add-a-delay-to-code-in-swift/

https://stackoverflow.com/questions/59682446/how-to-trigger-action-after-x-seconds-in-swiftui

https://www.hackingwithswift.com/example-code/system/how-to-run-code-after-a-delay-using-asyncafter-and-perform

https://www.zerotoappstore.com/create-a-delay-or-wait-in-swift.html

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