如何将DeviceMotion功能添加到Swift Playground?

时间:2019-03-22 07:00:29

标签: ios swift xcode swift-playground

我正在Swift操场上工作,我试图使用此代码来获取:

@objc func update()
{
    if let deviceMotion = motionManager.deviceMotion {
        print("Device Motion Yaw: \(deviceMotion.attitude.yaw)")
    }
}

但是,即使Motion设备可以在iOS上运行,它似乎也无法在Swift操场上运行。我将如何改变运动场以支持设备运动?我正在使用运行iOS 12的iPad和最新版本的Swift游乐场以及使用Mac的代码。我知道该方法被完美调用,并且当我将它作为iPad和iPhone上的iOS应用程序的一部分放置时,代码可以完美运行。据我了解,默认情况下,我不会修改游乐场以支持此操作。

1 个答案:

答案 0 :(得分:0)

完全有可能。我已经做过几次了。您需要一个CMMotionManager类。有很多方法可以做到这一点,但我建议您使用计时器。这是一些示例代码,摘自Apple’s developer documentation,并经过修改以适合该问题。

let motion = CMMotionManager()
func startDeviceMotion() {
    if motion.isDeviceMotionAvailable {
        //How often to push updates
        self.motion.deviceMotionUpdateInterval = 1.0/60.0
        self.motion.showsDeviceMovementDisplay = true
        self.motion.startDeviceMotionUpdates(using: .xMagneticNorthZVertical)

        // Configure a timer to fetch the motion data.
        self.timer = Timer(fire: Date(), interval: (1.0 / 60.0), repeats: true,
                           block: { (timer) in
                            if let data = self.motion.deviceMotion {      
let x = data.attitude.pitch
let y = data.attitude.roll
let z = data.attitude.yaw
//Use the data                                
                            }
        })
        RunLoop.current.add(self.timer!, forMode: RunLoop.Mode.default)
    }
}
startDeviceMotionUpdates()

要么这样做,要么尝试类似的方法,同样可以从文档中获得

func startQueuedUpdates() {
   if motion.isDeviceMotionAvailable {       self.motion.deviceMotionUpdateInterval = 1.0 / 60.0
      self.motion.showsDeviceMovementDisplay = true
      self.motion.startDeviceMotionUpdates(using: .xMagneticNorthZVertical, 
               to: self.queue, withHandler: { (data, error) in
         // Make sure the data is valid before accessing it.
         if let validData = data {
            // Get the attitude relative to the magnetic north reference frame. 
            let roll = validData.attitude.roll
            let pitch = validData.attitude.pitch
            let yaw = validData.attitude.yaw

            // Use the motion data in your app.
         }
      })
   }
}