swift - 数字表冠旋转的增量/减量值

Question

我能够获得数字表冠的事件，我想降低速度，因为旋转一个小表冠会调用多个事件。所以，我想实现如果在任何方向上有大约 30 度的旋转，我将增加或减少该值。我该怎么做？

func crownDidRotate(_ crownSequencer: WKCrownSequencer?, rotationalDelta: Double) {
if value > 0 {
   myValue = myValue + 1
} else if value < 0 {
   myValue = myValue - 1
}
}

Answer 1

要在 watchOS 中实现预期结果，您需要管理额外的变量，这些变量会告诉我们有关以某个特定角度旋转的数码表冠，例如，

let expectedMoveDelta = 0.523599 //Here, current delta value = 30° Degree, Set delta value according requirement.
var crownRotationalDelta = 0.0 

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

     crownRotationalDelta  += rotationalDelta
     if crownRotationalDelta > expectedMoveDelta { //Crown rotating in clock-wise direction 
         myValue = myValue + 1
         crownRotationalDelta = 0.0 
     } else if crownRotationalDelta < -expectedMoveDelta { //Crown rotating in anti clock-wise direction 
         myValue = myValue - 1
         crownRotationalDelta = 0.0 
     }
}