objective-c - 我需要使用 NSTimer 从陀螺仪 iOS 获取数据吗？

Question

现在我正在使用以下代码从设备的陀螺仪中获取欧拉值。这是它应该如何使用？或者有没有不使用 NSTimer 的更好方法？

- (void)viewDidLoad {
[super viewDidLoad];
CMMotionManager *motionManger = [[CMMotionManager alloc] init];
[motionManger startDeviceMotionUpdates];

NSTimer *timer = [NSTimer scheduledTimerWithTimeInterval:(1/6) target:self selector:@selector(read) userInfo:nil repeats:YES];
}

- (void)read {
CMAttitude *attitude;
CMDeviceMotion *motion = motionManger.deviceMotion;
attitude = motion.attitude;
int yaw = attitude.yaw; 
}

Answer 1

你可以使用这个...

    [motionManager startDeviceMotionUpdatesToQueue:[NSOperationQueue currentQueue] withHandler:^(CMDeviceMotion *motion, NSError *error)
 {
     CMAttitude *attitude;
     attitude = motion.attitude;
     int yaw = attitude.yaw; 
 }];