ios - 用于 Force Touch/Digital Crown 的 WatchKit API？

Question

我对 Apple Watch 引入的新用户交互可能性感到非常兴奋，其中包括 Force Touch 和 Digital Crown。

但是，我无法在 WatchKit API 中找到对它们的提及。有什么方法可以从 Force Touch/Digital Crown 接收事件吗？是否可以为事件设置自定义处理程序？

Answer 1

watchOS 3 添加了 WKCrownSequencer和 WKCrownDelegate报告数字表冠的状态(例如转速)，以及在用户旋转表冠时接收通知。

您可以使用皇冠音序器提供通用输入来控制场景或界面对象。

Apple 已更新其 WatchKit Catalog sample code包括一个 WKInterfaceController 表冠音序器示例，演示如何使用 Apple Watch 数字表冠与其他对象交互:

class CrownDetailController: WKInterfaceController, WKCrownDelegate {
    @IBOutlet var velocityLabel: WKInterfaceLabel!
    @IBOutlet var stateLabel: WKInterfaceLabel!
    @IBOutlet var pickerView: WKInterfacePicker!

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

        let itemList: [(String, String)] = [
            ("Item 1", "Red"),
            ("Item 2", "Green"),
            ("Item 3", "Blue")
        ]
        let pickerItems: [WKPickerItem] = itemList.map {
            let pickerItem = WKPickerItem()
            pickerItem.caption = $0.0
            pickerItem.title = $0.1
            return pickerItem
        }
        pickerView.setItems(pickerItems)

        crownSequencer.delegate = self
    }

    override func willActivate() {
        // This method is called when watch view controller is about to be visible to user
        super.willActivate()
        crownSequencer.focus()
    }

    @IBAction func focusCrown(sender: AnyObject) {
        crownSequencer.focus()
    }

    func updateCrownLabels() {
        velocityLabel.setText(String(format: "RPS: %2.2lf", crownSequencer.rotationsPerSecond))
        stateLabel.setText(crownSequencer.isIdle ? "Idle: true" : "Idle: false")
    }

    func crownDidBecomeIdle(_ crownSequencer: WKCrownSequencer?) {
        updateCrownLabels()
    }

    func crownDidRotate(_ crownSequencer: WKCrownSequencer?, rotationalDelta: Double) {
        updateCrownLabels()
    }

}