CODEWITHSUNDEEP
iosswiftswiftuiwatchos-6
Kostas
Kostas

Reputation: 140

How to Print Crown Input to Console in WatchOS 6

I'm trying to print crown input in Apple Watch and I can't get it to work.

I have created a new watch app (for watch only).

I have this in my HostingController:

import WatchKit
import Foundation
import SwiftUI

class HostingController: WKHostingController<ContentView>, WKCrownDelegate {

    override func awake(withContext context: Any?) {
        super.awake(withContext: context)

        print("awake")

        crownSequencer.delegate = self
    }

    override func willActivate() {
        super.willActivate()

        print("willActivate")

        crownSequencer.focus()
    }

    func crownDidRotate(_ crownSequencer: WKCrownSequencer?, rotationalDelta: Double) {
        print("\(rotationalDelta)")
    }

    override var body: ContentView {
        return ContentView()
    }
}

In the console "awake" and "willActivate" are both showing up. But when I am rotating the crown nothing shows up.

What am I missing?

Upvotes: 3

Views: 648

Answers (3)

Ric Santos
Ric Santos

Reputation: 16467

As you are using WKHostingController, you will need to use the swiftUI API's for the digital crown. It appears the standard (old) API just fails silently.

You will need a @State variable to bind the crown to, to make ui element focusable and to add the crown modifier.

@State var rotationValue = 0.0

var body: some View {
    Text("Crown did rotate: \(rotationValue)")
        .focusable(true)
        .digitalCrownRotation($rotationValue)
}

Upvotes: 4

E.Coms
E.Coms

Reputation: 11539

Seriously, if you use a swiftUI solution, you are supposed to use combine to perform the communication, i.e. monitoring the crownSequencer value.

Upvotes: 0

Kostas
Kostas

Reputation: 140

OK after a lot of digging and testing I solved this.

The crown will register movements in WKInterfaceController class extension and not in WKHostingController that I was referring to in my question.

I am very new to watch development so I can't figure out why is this happening, but it works.

Upvotes: 0

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