self.mManager = [[CMMotionManager alloc]init];

  self.mManager.deviceMotionUpdateInterval = 0.5;

  

  if (self.mManager.gyroAvailable) {

    [self.mManager startDeviceMotionUpdatesToQueue:[NSOperationQueue currentQueue] withHandler:^(CMDeviceMotion * _Nullable motion, NSError * _Nullable error) {

      NSLog(@"RotationRate X:%.2lf Y:%.2lf Z:%.2lf ",motion.userAcceleration.x,motion.userAcceleration.y,motion.userAcceleration.z);

    }];

  }

-(void) viewDidLoad {
   // Request to turn on accelerometer and begin receiving accelerometer events
   [[UIDevice currentDevice] beginGeneratingDeviceOrientationNotifications];
   [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(orientationChanged:) name:UIDeviceOrientationDidChangeNotification object:nil];
}
 
- (void)orientationChanged:(NSNotification *)notification {
   // Respond to changes in device orientation
}
 
-(void) viewDidDisappear {
   // Request to stop receiving accelerometer events and turn off accelerometer
   [[NSNotificationCenter defaultCenter] removeObserver:self];
   [[UIDevice currentDevice] endGeneratingDeviceOrientationNotifications];
}

- (BOOL)canBecomeFirstResponder {
  return YES;
}
 
- (void)viewDidAppear:(BOOL)animated {
  [self becomeFirstResponder];
}

- (void)motionBegan:(UIEventSubtype)motion withEvent:(UIEvent *)event NS_AVAILABLE_IOS(3_0);
- (void)motionEnded:(UIEventSubtype)motion withEvent:(UIEvent *)event NS_AVAILABLE_IOS(3_0);
- (void)motionCancelled:(UIEventSubtype)motion withEvent:(UIEvent *)event NS_AVAILABLE_IOS(3_0);

- (void)motionEnded:(UIEventSubtype)motion withEvent:(UIEvent *)event {
  if (motion == UIEventSubtypeMotionShake)
  {
    // FlyElephant http://www.cnblogs.com/xiaofeixiang
    [[NSNotificationCenter defaultCenter] postNotificationName:@"FlyElephant" object:self];
  }
}

//判断加速计是否可用
if ([_motionManager isAccelerometerAvailable]) {
  // 设置加速计采样频率
  [_motionManager setAccelerometerUpdateInterval:1 / 40.0];
  [_motionManager startAccelerometerUpdates];
} else {
  NSLog(@"博客园-FlyElephant");
}

-(void)touchesEnded:(NSSet *)touches withEvent:(UIEvent *)event{
   CMAcceleration acceleration=_motionManager.accelerometerData.acceleration;
  NSLog(@"%f---%f---%f",acceleration.x,acceleration.y,acceleration.z);
}

@property (strong,nonatomic) CMMotionManager *motionManager;
 
@property (strong,nonatomic) NSOperationQueue *quene;
_motionManager=[[CMMotionManager alloc]init];
//判断加速计是否可用
if ([_motionManager isAccelerometerAvailable]) {
    // 设置加速计频率
    [_motionManager setAccelerometerUpdateInterval:1 / 40.0];
    //开始采样数据
    [_motionManager startAccelerometerUpdatesToQueue:_quene withHandler:^(CMAccelerometerData *accelerometerData, NSError *error) {
        NSLog(@"%f---%f",accelerometerData.acceleration.x,accelerometerData.acceleration.y);
    }];
} else {
    NSLog(@"博客园-FlyElephant");
}

static const NSTimeInterval gyroMin = 0.01;
 
- (void)startUpdatesWithSliderValue:(int)sliderValue {
 
   // Determine the update interval
   NSTimeInterval delta = 0.005;
   NSTimeInterval updateInterval = gyroMin + delta * sliderValue;
 
   // Create a CMMotionManager
   CMMotionManager *mManager = [(APLAppDelegate *)[[UIApplication sharedApplication] delegate] sharedManager];
   APLGyroGraphViewController * __weak weakSelf = self;
 
   // Check whether the gyroscope is available
   if ([mManager isGyroAvailable] == YES) {
     // Assign the update interval to the motion manager
     [mManager setGyroUpdateInterval:updateInterval];
     [mManager startGyroUpdatesToQueue:[NSOperationQueue mainQueue] withHandler:^(CMGyroData *gyroData, NSError *error) {
        [weakSelf.graphView addX:gyroData.rotationRate.x y:gyroData.rotationRate.y z:gyroData.rotationRate.z];
        [weakSelf setLabelValueX:gyroData.rotationRate.x y:gyroData.rotationRate.y z:gyroData.rotationRate.z];
     }];
   }
   self.updateIntervalLabel.text = [NSString stringWithFormat:@"%f", updateInterval];
}
 
- (void)stopUpdates{
   CMMotionManager *mManager = [(APLAppDelegate *)[[UIApplication sharedApplication] delegate] sharedManager];
   if ([mManager isGyroActive] == YES) {
     [mManager stopGyroUpdates];
   }
}