1、访问原始的Motion数据

#import <UIKit/UIKit.h>
#import <CoreMotion/CoreMotion.h> @interface ViewController : UIViewController @property (strong, nonatomic) IBOutlet UILabel *xAccLabel;
@property (strong, nonatomic) IBOutlet UILabel *yAccLabel;
@property (strong, nonatomic) IBOutlet UILabel *zAccLabel;
@property (strong, nonatomic) IBOutlet UILabel *xGyroLabel;
@property (strong, nonatomic) IBOutlet UILabel *yGyroLabel;
@property (strong, nonatomic) IBOutlet UILabel *zGyroLabel;
@property (strong, nonatomic) IBOutlet UILabel *xMagLabel;
@property (strong, nonatomic) IBOutlet UILabel *yMagLabel;
@property (strong, nonatomic) IBOutlet UILabel *zMagLabel; @property (nonatomic, strong) CMMotionManager * motionManager; - (void)startUpdates;
- (void)stopUpdates;
- (CMMotionManager *)motionManager
{
if (_motionManager == nil)
{
_motionManager = [[CMMotionManager alloc] init];
}
return _motionManager;
} - (void)startUpdates
{
// Start accelerometer if available
if ([self.motionManager isAccelerometerAvailable])
{
[self.motionManager setAccelerometerUpdateInterval:1.0/2.0]; //Update twice per second
[self.motionManager startAccelerometerUpdatesToQueue:[NSOperationQueue mainQueue]
withHandler:
^(CMAccelerometerData *data, NSError *error)
{
self.xAccLabel.text = [NSString stringWithFormat:@"%f", data.acceleration.x];
self.yAccLabel.text = [NSString stringWithFormat:@"%f", data.acceleration.y];
self.zAccLabel.text = [NSString stringWithFormat:@"%f", data.acceleration.z];
}];
} // Start gyroscope if available
if ([self.motionManager isGyroAvailable])
{
[self.motionManager setGyroUpdateInterval:1.0/2.0]; //Update twice per second
[self.motionManager startGyroUpdatesToQueue:[NSOperationQueue mainQueue]
withHandler:
^(CMGyroData *data, NSError *error)
{
self.xGyroLabel.text = [NSString stringWithFormat:@"%f", data.rotationRate.x];
self.yGyroLabel.text = [NSString stringWithFormat:@"%f", data.rotationRate.y];
self.zGyroLabel.text = [NSString stringWithFormat:@"%f", data.rotationRate.z];
}];
} // Start magnetometer if available
if ([self.motionManager isMagnetometerAvailable])
{
[self.motionManager setMagnetometerUpdateInterval:1.0/2.0]; //Update twice per second
[self.motionManager startMagnetometerUpdatesToQueue:[NSOperationQueue mainQueue]
withHandler:
^(CMMagnetometerData *data, NSError *error)
{
self.xMagLabel.text = [NSString stringWithFormat:@"%f", data.magneticField.x];
self.yMagLabel.text = [NSString stringWithFormat:@"%f", data.magneticField.y];
self.zMagLabel.text = [NSString stringWithFormat:@"%f", data.magneticField.z];
}];
}
} -(void)stopUpdates
{
if ([self.motionManager isAccelerometerAvailable] && [self.motionManager isAccelerometerActive])
{
[self.motionManager stopAccelerometerUpdates];
} if ([self.motionManager isGyroAvailable] && [self.motionManager isGyroActive])
{
[self.motionManager stopGyroUpdates];
} if ([self.motionManager isMagnetometerAvailable] && [self.motionManager isMagnetometerActive])
{
[self.motionManager stopMagnetometerUpdates];
} }
- (void)applicationWillResignActive:(UIApplication *)application
{
[self.viewController stopUpdates];
} - (void)applicationDidBecomeActive:(UIApplication *)application
{
[self.viewController startUpdates];
}

2、访问设备的Motion数据

#import <UIKit/UIKit.h>
#import <CoreMotion/CoreMotion.h> @interface ViewController : UIViewController @property (strong, nonatomic) IBOutlet UILabel *rollLabel;
@property (strong, nonatomic) IBOutlet UILabel *pitchLabel;
@property (strong, nonatomic) IBOutlet UILabel *yawLabel;
@property (strong, nonatomic) IBOutlet UILabel *xRotLabel;
@property (strong, nonatomic) IBOutlet UILabel *yRotLabel;
@property (strong, nonatomic) IBOutlet UILabel *zRotLabel;
@property (strong, nonatomic) IBOutlet UILabel *xGravLabel;
@property (strong, nonatomic) IBOutlet UILabel *yGravLabel;
@property (strong, nonatomic) IBOutlet UILabel *zGravLabel;
@property (strong, nonatomic) IBOutlet UILabel *xAccLabel;
@property (strong, nonatomic) IBOutlet UILabel *yAccLabel;
@property (strong, nonatomic) IBOutlet UILabel *zAccLabel;
@property (strong, nonatomic) IBOutlet UILabel *xMagLabel;
@property (strong, nonatomic) IBOutlet UILabel *yMagLabel;
@property (strong, nonatomic) IBOutlet UILabel *zMagLabel; @property (nonatomic, strong) CMMotionManager *motionManager; - (void)startUpdates;
- (void)stopUpdates; @end
- (CMMotionManager *)motionManager
{
// Lazy initialization
if (_motionManager == nil)
{
_motionManager = [[CMMotionManager alloc] init];
}
return _motionManager;
} - (void)startUpdates
{
// Start device motion updates
if ([self.motionManager isDeviceMotionAvailable])
{
//Update twice per second
[self.motionManager setDeviceMotionUpdateInterval:1.0/2.0];
[self.motionManager startDeviceMotionUpdatesUsingReferenceFrame:
CMAttitudeReferenceFrameXMagneticNorthZVertical
toQueue:[NSOperationQueue mainQueue]
withHandler:
^(CMDeviceMotion *deviceMotion, NSError *error)
{
// Update attitude labels
self.rollLabel.text = [NSString stringWithFormat:@"%f", deviceMotion.attitude.roll];
self.pitchLabel.text = [NSString stringWithFormat:@"%f", deviceMotion.attitude.pitch];
self.yawLabel.text = [NSString stringWithFormat:@"%f", deviceMotion.attitude.yaw]; // Update rotation rate labels
self.xRotLabel.text = [NSString stringWithFormat:@"%f", deviceMotion.rotationRate.x];
self.yRotLabel.text = [NSString stringWithFormat:@"%f", deviceMotion.rotationRate.y];
self.zRotLabel.text = [NSString stringWithFormat:@"%f", deviceMotion.rotationRate.z]; // Update user acceleration labels
self.xGravLabel.text = [NSString stringWithFormat:@"%f", deviceMotion.gravity.x];
self.yGravLabel.text = [NSString stringWithFormat:@"%f", deviceMotion.gravity.y];
self.zGravLabel.text = [NSString stringWithFormat:@"%f", deviceMotion.gravity.z]; // Update user acceleration labels
self.xAccLabel.text = [NSString stringWithFormat:@"%f", deviceMotion.userAcceleration.x];
self.yAccLabel.text = [NSString stringWithFormat:@"%f", deviceMotion.userAcceleration.y];
self.zAccLabel.text = [NSString stringWithFormat:@"%f", deviceMotion.userAcceleration.z]; // Update magnetic field labels
self.xMagLabel.text = [NSString stringWithFormat:@"%f", deviceMotion.magneticField.field.x];
self.yMagLabel.text = [NSString stringWithFormat:@"%f", deviceMotion.magneticField.field.y];
self.zMagLabel.text = [NSString stringWithFormat:@"%f", deviceMotion.magneticField.field.z];
}];
}
} -(void)stopUpdates
{
if ([self.motionManager isDeviceMotionAvailable] && [self.motionManager isDeviceMotionActive])
{
[self.motionManager stopDeviceMotionUpdates];
}
}
- (void)applicationWillResignActive:(UIApplication *)application
{
[self.viewController stopUpdates];
} - (void)applicationDidBecomeActive:(UIApplication *)application
{
[self.viewController startUpdates];
}

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