core-motion

I'm writing an app which requires the M7 Motion co-processor chip in the iPhone 5S. Since this chip isn't in any other iPhone, the app will only function properly on an iPhone 5S. Is there any way to require that a user has an iPhone 5S before downloading my app? Sort of like how you can make an app iPad specific? I am looking for a way to select the iPhone hardware requirement. Not the iOS version requirement. I spoke with Apple and the correct answer is at this time NO. You can not specify via Required device capabilities or otherwise that an iPhone 5S is required for a specific app. You can

My app reports and records location, altitude, rotation and accelerometer data (DeviceMotion) while in the background. This works fine on ios 10.3.3. On IOS 11, I no longer have access motion data while the device is locked. Altitude data and location data is still streaming to the console, though. Has something changed in IOS 11 that prevents me from accessing motion data or am I doing trying to access it in a way that Apple now blocks like OperationQueue.main Here is how I'm starting motion updates. If the phone is unlocked, all works fine. If I locking the phone, no more updates.: let

I'm trying to use magnetometer: [myMotionMngr startDeviceMotionUpdatesToQueue: [NSOperationQueue currentQueue] withHandler:^(CMDeviceMotion *motion, NSError *error) { printf("%f\t%f\t%f\n", motion.magneticField.field.x, motion.magneticField.field.y, motion.magneticField.field.z); CMMagneticFieldCalibrationAccuracy acc = motion.magneticField.accuracy; }]; And the filed (x,y,z) is always 0. motion.magneticField.accuracy is always CMMagneticFieldCalibrationAccuracyUncalibrated . According to docs it means that my device has got no magnetometer, however it is no true cause I'm testing on iPad2

I am try to use motion manager in Swift but the log inside my update block never prints. var motionManager: CMMotionManager = CMMotionManager() motionManager.accelerometerUpdateInterval = 0.01 println(motionManager.deviceMotionAvailable) // print true println(motionManager.deviceMotionActive) // print false motionManager.startDeviceMotionUpdatesToQueue(NSOperationQueue.currentQueue(), withHandler:{ deviceManager, error in println("Test") // no print }) println(motionManager.deviceMotionActive) // print false My Objective-C implementation works fine. Does anyone know why my update block isn't

Is there a way to obtain a relative rotation from core motion? What I need is: how much it rotated in one axis and which direction (+ sign = anti-clockwise, - = clockwise, according to the right-hand rule). I have found the property rotationRate, but I am now sure how I would extract the angle out of it, as this is giving me radians per second. I have done all kind of stuff on the last days but nothing is giving me stable values. I have tried to do a timed sample of core motion data, using a NSTimer and calculate the difference between two samples, so I would have how much it rotated since the

I am porting an app that I originally wrote using the accelerometer for IOS 3, to incorporate the new IOS 4 motion capabilities. While capturing motion, the application does little else - no graphics updates for example. I'm doing the following to set up motion updates, as a replacement for my previous use of the accelerometer. I do realize that I could rebuild to do my own polling using NSTimer or something, and may pursue that yet. [motionManager setDeviceMotionUpdateInterval:updateInterval]; CMDeviceMotionHandler motionHandler = ^(CMDeviceMotion *motion, NSError *error) { [self