[英]how to detect motion of iPhone 6 device? (determine whether iPhone device moved or not -smallest possible motion on x,y,z- )
我正在執行一項任務,以確定iPhone 6何時沿任何方向(x,y或Z)移動(最小移動,甚至不動搖!)。 最好的方法是什么?
我使用了此代碼,發現它很有用,它包含四個功能:-啟動運動管理器-停止運動管理器-更新運動管理器-
import CoreMotion
let motionManager: CMMotionManager = CMMotionManager()
var initialAttitude : CMAttitude!
//start motion manager
func StartMotionManager () {
if !motionManager.deviceMotionActive {
motionManager.deviceMotionUpdateInterval = 1
motionManager.startDeviceMotionUpdates()
}
}
//stop motion manager
func stopMotionManager ()
{
if motionManager.deviceMotionActive
{
motionManager.stopDeviceMotionUpdates()
}
}
//update motion manager
func updateMotionManager (var x : UIViewController)
{
if motionManager.deviceMotionAvailable {
//sleep(2)
initialAttitude = motionManager.deviceMotion.attitude
motionManager.startDeviceMotionUpdatesToQueue(NSOperationQueue.currentQueue(), withHandler:{
[weak x] (data: CMDeviceMotion!, error: NSError!) in
data.attitude.multiplyByInverseOfAttitude(initialAttitude)
// calculate magnitude of the change from our initial attitude
let magnitude = magnitudeFromAttitude(data.attitude) ?? 0
let initMagnitude = magnitudeFromAttitude(initialAttitude) ?? 0
if magnitude > 0.1 // threshold
{
// Device has moved !
// put the code which should fire upon device moving write here
initialAttitude = motionManager.deviceMotion.attitude
}
})
println(motionManager.deviceMotionActive) // print false
}
}
// get magnitude of vector via Pythagorean theorem
func magnitudeFromAttitude(attitude: CMAttitude) -> Double {
return sqrt(pow(attitude.roll, 2) + pow(attitude.yaw, 2) + pow(attitude.pitch, 2))
}
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