使用 Storyboard 检测 WatchKit 上所有四个方向的滑动

我正在尝试检测 AppleWatch 上所有四个方向的滑动.但是我不清楚如何为我插入故事板的 WKSwipeGestureRecognizer 的方向分配许多值.我试过:

I am trying to detect the swipes on the AppleWatch on all four directions. Yet I am not clear how to assign many values to the direction of the WKSwipeGestureRecognizer I inserted in the Storyboard. I tried with:

swiper.direction = [.right , .left ,  .up , .down]

有趣的是，编译器接受了这一点，与使用按位 | 不同，但是，使用此配置，功能:

that was funnily accepted by the compiler, differently of using the bitwise |, but, using this configuration, function:

@IBAction func swipe(_ sender: Any) {
    switch swiper.direction {
    case WKSwipeGestureRecognizerDirection.right:
        print("Swiped right")
    case WKSwipeGestureRecognizerDirection.down:
        print("Swiped down")
    case WKSwipeGestureRecognizerDirection.left:
        print("Swiped left")
    case WKSwipeGestureRecognizerDirection.up:
        print("Swiped up")
    default:
        break
    }

}

很少被调用，当它是 swiper.direction 时总是 .right.

is very seldom called and when it is the swiper.direction is invariably .right.

Apple 在以下方面非常神秘:https://developer.apple.com/reference/watchkit/wkswipegesturerecognizer/1650828-direction说:

Apple is very cryptic at: https://developer.apple.com/reference/watchkit/wkswipegesturerecognizer/1650828-direction by saying:

"这个属性的默认值是对的，可以指定更多比一个方向跟踪多个方向的滑动相同的手势识别器."

"The default value of this property is right. You may specify more than one direction to track swipes in multiple directions with the same gesture recognizer."

没有透露如何.