iOS 倾角

        [self.motionManager startDeviceMotionUpdatesToQueue:[NSOperationQueue currentQueue] withHandler:^(CMDeviceMotion *motion,NSError *error){
            double gravityX = motion.gravity.x;
           
            double gravityY = motion.gravity.y;
           
            double gravityZ = motion.gravity.z;

            NSLog(@"gravityX = %f",gravityX);
           
            NSLog(@"gravityY = %f",gravityY);
           
            NSLog(@"gravityZ = %f",gravityZ);
           
            double zTheta =atan2(gravityZ, sqrtf(gravityX*gravityX+gravityY*gravityY))/M_PI*180.0;
            double xTheta =atan2(gravityX, sqrtf(pow(gravityY, 2)+pow(gravityZ, 2)))/M_PI*180.0;
            double yTheta =atan2(gravityY, sqrtf(pow(gravityX, 2)+pow(gravityZ, 2)))/M_PI*180.0;

            NSLog(@"获取手机的倾斜角度 zTheta = %f",zTheta);
            NSLog(@"获取手机的倾斜角度 xTheta = %f",xTheta);
            NSLog(@"获取手机的倾斜角度 yTheta = %f",yTheta);
           
            self.z = zTheta;
           
        }];