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2014/10/15 ¤U¤È 10:15:59
iphone Programming Glossary: withhandlerWhy am I getting 0 degrees from magneticField property the whole time? http://stackoverflow.com/questions/11711646/why-am-i-getting-0-degrees-from-magneticfield-property-the-whole-time Set the magnetometerUpdateInterval property to specify an update interval. Call the startMagnetometerUpdatesToQueue withHandler method passing a block of type CMMagnetometerHandler. Magnetic field data is passed into the block as CMMagnetometerData..
Safe update interval for startDeviceMotionUpdatesToQueue:withHandler:? http://stackoverflow.com/questions/11797857/safe-update-interval-for-startdevicemotionupdatestoqueuewithhandler update interval for startDeviceMotionUpdatesToQueue withHandler EDIT added a global and now it's working. But I still have my doubts.. Please read on I want to get the acceleration exercised.. 0.03 update every 30ms motionManager startDeviceMotionUpdatesToQueue NSOperationQueue mainQueue withHandler ^ CMDeviceMotion motion NSError error myAcceleration motion.userAcceleration.y while self.stopButtonPressed NSLog..
Using quaternion instead of roll, pitch and yaw to track device motion http://stackoverflow.com/questions/19239482/using-quaternion-instead-of-roll-pitch-and-yaw-to-track-device-motion the image didFinishSavingWithError self.motionManager startDeviceMotionUpdatesToQueue NSOperationQueue mainQueue withHandler ^ CMDeviceMotion motion NSError error CMQuaternion quat self.motionManager.deviceMotion.attitude.quaternion double tempYaw..
Is it possible to run accelerometer of iPhone in background? http://stackoverflow.com/questions/2294985/is-it-possible-to-run-accelerometer-of-iphone-in-background app is allowed to run in the background for other reasons. See the Core Motion API's startAccelerometerUpdatesToQueue withHandler method here https developer.apple.com library ios documentation CoreMotion Reference CMMotionManager_Class Reference Reference.html#..
Actual frequency of device motion updates lower than expected, but scales up with setting http://stackoverflow.com/questions/5034411/actual-frequency-of-device-motion-updates-lower-than-expected-but-scales-up-wit self processMotion motion withError error motionManager startDeviceMotionUpdatesToQueue NSOperationQueue currentQueue withHandler motionHandler This works but the update interval doesn't behave as expected. I've stripped out all execution code in the..
http://stackoverflow.com/questions/5214197/simple-iphone-motion-detect in accelerometer signals as well. Create a CMDeviceMotionHandler as described in startDeviceMotionUpdatesToQueue withHandler Your CMDeviceMotionHandler should do something like float accelerationThreshold 0.2 or whatever is appropriate play around..
Store orientation to an array - and compare http://stackoverflow.com/questions/6368618/store-orientation-to-an-array-and-compare the pitch roll and yaw using self.motionManager startDeviceMotionUpdatesToQueue NSOperationQueue currentQueue withHandler ^ CMDeviceMotion motion NSError error CMAttitude attitude motion.attitude NSLog @ pitch f roll f yaw f attitude.pitch attitude.roll..
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