迅捷 – 获得WatchOS数字皇冠价值

如果你希望你的值在1到10之间,你只需要实现一些简单的逻辑来检查你添加rotationDelta时它的值是什么,如果它超出1-10的范围,则将值映射到1或10,取决于新值将超过的方向.我假设你想要值为Int,如果没有,只需删除rotationDelta到Int的转换,值将为Double.

请记住,rotationDelta为1.0表示表冠的完整旋转,而rotationDelta则根据旋转方向改变其符号.

class MyInterfaceController: WKInterfaceController,WKCrownDelegate {
    var value = 1
    @IBOutlet var label: WKInterfaceLabel!

    override func awake(withContext context: Any?) {
        super.awake(withContext: context)
        crownSequencer.delegate = self
    }

    func crownDidRotate(_ crownSequencer: WKCrownSequencer?,rotationalDelta: DoublE) {
        let newValue = value + Int(rotationalDelta)
        if newValue < 1 {
            value = 1
        } else if newValue > 10 {
            value = 10
        } else {
            value = newValue
        }
        label.setText("Current value: \(value)")
    }
}