title: having issue with scrolling image with gyroscope
body: <p>I have a strange problem with iPad Air !!! , my code runs fine on iPad 3 , iPad 4 , iPhone 5S , iPod 5th Gen , but on iPad air , my image scrolls automatically without user rotate the device , here is my code :</p>
  
  <pre><code> @property (strong, nonatomic) CMMotionManager *motionManager;
  
  
      self.mainScrollView.frame = CGRectMake(0, 0, self.view.frame.size.width, self.view.frame.size.height);
  
      self.mainScrollView.bounces = NO;
  
  
      self.mainScrollView.userInteractionEnabled = NO;
  
      //set up the image view
      UIImage *image= [UIImage imageNamed:@"YOUR_IMAGE_NAME"];
      UIImageView *movingImageView = [[UIImageView alloc]initWithImage:image];
      [self.mainScrollView addSubview:movingImageView];
  
      self.mainScrollView.contentSize = CGSizeMake(movingImageView.frame.size.width, self.mainScrollView.frame.size.height);
  
  
      self.mainScrollView.contentOffset = CGPointMake((self.mainScrollView.contentSize.width - self.view.frame.size.width) / 2, 0);
  
      //inital the motionManager and detec the Gyroscrope for every 1/60 second
      //the interval may not need to be that fast
      self.motionManager = [[CMMotionManager alloc] init];
      self.motionManager.gyroUpdateInterval = 1/60;
  
      //this is how fast the image should move when rotate the device, the larger the number, the less the roation required.
      CGFloat motionMovingRate = 4;
  
      //get the max and min offset x value
      int maxXOffset = self.mainScrollView.contentSize.width - self.mainScrollView.frame.size.width;
      int minXOffset = 0;
  
      [self.motionManager startGyroUpdatesToQueue:[NSOperationQueue currentQueue]
                                  withHandler:^(CMGyroData *gyroData, NSError *error) {
  
           if (fabs(gyroData.rotationRate.y) &gt;= 0.1) {
              CGFloat targetX = self.mainScrollView.contentOffset.x - gyroData.rotationRate.y * motionMovingRate;
  
               if(targetX &gt; maxXOffset)
                     targetX = maxXOffset;
               else if (targetX &lt; minXOffset)
                     targetX = minXOffset;
  
  
               self.mainScrollView.contentOffset = CGPointMake(targetX, 0);
            }
     }];
  </code></pre>
  
  <p>it's kind of animation !!! this code works fine on other devices ! any help ?Thanks </p>