用陀螺仪滚动图像有问题

我有一个与iPad Air奇怪的问题！ ，我的代码在iPad 3，iPad 4，iPhone 5S，iPod 5代上运行良好，但在iPad空气中，我的图像自动滚动，无需用户旋转设备，这里是我的代码：

@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) >= 0.1) { CGFloat targetX = self.mainScrollView.contentOffset.x - gyroData.rotationRate.y * motionMovingRate; if(targetX > maxXOffset) targetX = maxXOffset; else if (targetX < minXOffset) targetX = minXOffset; self.mainScrollView.contentOffset = CGPointMake(targetX, 0); } }]; 

这是一种animation！ 此代码在其他设备上正常工作！ 任何帮助？谢谢

Answer 1

你可以尝试以下操作：这会将error handling添加到您的代码中，因为陀螺仪可能会返回一个错误，并且这可能返回值> 0.09; testing时，更经常地使用NSLOG来挑选代码并查看返回的值。

 @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 NO ERROR --- if(!error){ NSLog(@"No error from Gyroscope %f",gyroData.rotationRate.y); if (fabs(gyroData.rotationRate.y) >= 0.1) { NSLog(@"Moving image"); CGFloat targetX = self.mainScrollView.contentOffset.x - gyroData.rotationRate.y * motionMovingRate; if(targetX > maxXOffset) targetX = maxXOffset; else if (targetX < minXOffset) targetX = minXOffset; self.mainScrollView.contentOffset = CGPointMake(targetX, 0); } } // ERROR returned from GYRO else NSLog(@"error recieved %@",error); }];