The torch flashes once briefly before lighting up continuously.

[s33k2k22]

Hello all, first of all thanks for this great code!

I just have a little problem with the isTorchOn Option.

CodeScannerView(codeTypes: [.qr], showViewfinder: true, isTorchOn: true)

For me, the torch flashes once briefly before lighting up continuously. Is this a bug? Is there a way to create a button on the view to turn the torch on or off when scanning the QR code?

thanks a lot!

[calebmarquart]

To create a button to turn on the flashlight put CodeScannerView inside a ZStack with a button positioned somewhere on top (if that's what you want). Then just create a @State variable for if the torch is on and then pass that as a binding into the parameter isTorchOn. The button can then toggle the variable and it will automatically update the torch.

[nathanfallet]

You can do something like this:

struct ScannerView: View {

    @State var torchIsOn: Bool = false
    @State var isGalleryPresented: Bool = false

    var body: some View {
        ZStack {
            CodeScannerView(
                codeTypes: [.qr],
                scanMode: .oncePerCode,
                isTorchOn: $torchIsOn,
                isGalleryPresented: $isGalleryPresented,
                completion: { _ in }
            )
            .ignoresSafeArea()
            VStack {
                Spacer()
                HStack {
                    Button(action: toggleTorch) {
                        Image(systemName: torchIsOn ? "bolt.fill" : "bolt.slash.fill")
                            .imageScale(.large)
                            .frame(width: 40, height: 40)
                            .foregroundColor(torchIsOn ? Color.yellow : Color.accentColor)
                            .padding()
                    }
                    .background(Color(.systemGray6))
                    .cornerRadius(10)
                    Button(action: openGallery) {
                        Image(systemName: "photo.fill")
                            .imageScale(.large)
                            .frame(width: 40, height: 40)
                            .padding()
                    }
                    .background(Color(.systemGray6))
                    .cornerRadius(10)
                }
            }
            .padding()
        }
        .navigationTitle(Text("scanner_title"))
    }

    func toggleTorch() {
        torchIsOn.toggle()
    }

    func openGallery() {
        isGalleryPresented.toggle()
    }

}