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2014/10/15 ¤U¤È 10:11:31
iphone Programming Glossary: motionmanagerWhy 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 device's magnetometer. This is the code I've written but I just get 0 degrees.. What am I doing wrong CMMotionManager motionManager motionManager CMMotionManager alloc init motionManager startDeviceMotionUpdates CMDeviceMotion deviceMotion deviceMotion.. This is the code I've written but I just get 0 degrees.. What am I doing wrong CMMotionManager motionManager motionManager CMMotionManager alloc init motionManager startDeviceMotionUpdates CMDeviceMotion deviceMotion deviceMotion CMDeviceMotion.. I just get 0 degrees.. What am I doing wrong CMMotionManager motionManager motionManager CMMotionManager alloc init motionManager startDeviceMotionUpdates CMDeviceMotion deviceMotion deviceMotion CMDeviceMotion alloc init while self.stopButtonPressed..
Safe update interval for startDeviceMotionUpdatesToQueue:withHandler:? http://stackoverflow.com/questions/11797857/safe-update-interval-for-startdevicemotionupdatestoqueuewithhandler keep up with such an interval is this true double myAcceleration a global.. void play my main method.. CMMotionManager motionManager CMMotionManager alloc init motionManager.deviceMotionUpdateInterval 0.03 update every 30ms motionManager startDeviceMotionUpdatesToQueue.. double myAcceleration a global.. void play my main method.. CMMotionManager motionManager CMMotionManager alloc init motionManager.deviceMotionUpdateInterval 0.03 update every 30ms motionManager startDeviceMotionUpdatesToQueue NSOperationQueue mainQueue.. motionManager CMMotionManager alloc init motionManager.deviceMotionUpdateInterval 0.03 update every 30ms motionManager startDeviceMotionUpdatesToQueue NSOperationQueue mainQueue withHandler ^ CMDeviceMotion motion NSError error myAcceleration..
CMMotionManager and the Gyroscope on iPhone 4 http://stackoverflow.com/questions/3229311/cmmotionmanager-and-the-gyroscope-on-iphone-4 could not open locations log var mobile Library Caches CoreMotion CoreMotion.log Even if I just setup my motionManager object with CMMotionManager alloc init on its own and no other code I still get the error. Here is my .h file. #import UIKit.. UIKit UIKit.h #import CoreMotion CoreMotion.h @interface GyroTest0ViewController UIViewController CMMotionManager motionManager NSOperationQueue opQ @end And here my .m file. void viewDidLoad super viewDidLoad the error occurs even just with this line.. opQ @end And here my .m file. void viewDidLoad super viewDidLoad the error occurs even just with this line on its own motionManager CMMotionManager alloc init if motionManager.gyroAvailable motionManager.gyroUpdateInterval 1.0 60.0 motionManager startGyroUpdates..
http://stackoverflow.com/questions/3245733/apple-gyroscope-sample-code and optionally but recommended a reference attitude object So in your interface definition you add CMMotionManager motionManager CMAttitude referenceAttitude According to the docs you should only create one of these managers per application. I recommend.. According to the docs you should only create one of these managers per application. I recommend making the motionManager accesible through a singleton but thats some extra work which you might not need to do if you only instantiate your class.. you only instantiate your class once. Then in your init method you should allocate the motion manager object like so motionManager CMMotionManager alloc init referenceAttitude nil When you want to enable the gyro you could create an enableGyro method..
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 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.. CMDeviceMotionHandler motionHandler ^ CMDeviceMotion motion NSError error self processMotion motion withError error motionManager startDeviceMotionUpdatesToQueue NSOperationQueue currentQueue withHandler motionHandler This works but the update interval..
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