ActivityRings

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When I was experimenting this morning, I typed up this sample class:

class InterfaceController: WKInterfaceController {

    @IBOutlet weak var activityRingInterfaceScene: WKInterfaceSKScene!
    
    var activityRingScene = ActivityRingScene()
    
    override func willActivate() {
        activityRingScene.ringWidth = 15
        activityRingInterfaceScene.presentScene(activityRingScene)
    }
    
    override func didAppear() {
        activityRingScene.progress = 0.75
    }

}

Which looks like this:

Took me a while to figure out what the issue was, but it turns out the ActivityRingScene was defaulting to CGSize(width: 1, height: 1). The key to fixing that issue is something like ActivityRingScene(size: contentFrame.size).

I'm wondering if it would be worth trapping or emitting some warning when the ActivityRingScene size is unreasonably small (like 1x1 in that example).

I can't think of a good way to make it automatically have the correct behavior, since we don't have an opportunity to subclass WKInterfaceSKScene.

That’s a good catch! I haven’t done much WatchKit dev so I’m gonna have to look into the life cycle events a bit. Hopefully there’s something in there or some other prior art about dealing with this.

If not, a warning seems like the right way to go about this.

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