iOS开发-设备倾斜方向判断

- (void)startMotion {

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

       if (self.motionManager.accelerometerAvailable) {

       [_motionManager setAccelerometerUpdateInterval:1/5.f];

       NSOperationQueue *operationQueue = [NSOperationQueue mainQueue];

       __weak typeof(self) wSelf = self;

       [_motionManager startAccelerometerUpdatesToQueue:operationQueue withHandler:^(CMAccelerometerData     *data,NSError *error)

       {

              double x = data.acceleration.x;

              double y = data.acceleration.y;

              double z = data.acceleration.z;

              if (fabs(z) < 1.0) {

                   if (fabs(y) > 0.1) {

                   if (y > 0){

                           NSLog(@"左");

                   } else{

                          NSLog(@"右");

                  }

            } else if (fabs(x) > 0.15) {

                if (x > 0) {

                        NSLog(@"上");

                } else{

                       NSLog(@"下");

               }

         }

     }

     }];

 }

}