xcode 如何从 iOS 上的 Core Motion 获取数据
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how to get data from Core Motion on iOS
提问by Chris Lin
i have trouble getting the accelerometer data from core motion manager...i followed the documentation and it still doesn't work :(
我无法从核心运动管理器获取加速度计数据……我按照文档进行操作，但它仍然无法正常工作:(
self.manager = [[CMMotionManager alloc] init];
self.manager.accelerometerUpdateInterval = 0.01;
[self.manager startAccelerometerUpdates];
CMAccelerometerData *newestAccel = self.manager.accelerometerData;
int x, y, z;
x = newestAccel.acceleration.x;
y = newestAccel.acceleration.y;
z = newestAccel.acceleration.z;
any help would be very much appreciated!!
任何帮助将不胜感激！
采纳答案by Carl Goldsmith
I managed to make it work using blocks, here's the code that I managed to get working:
我设法使用块使其工作，这是我设法开始工作的代码：
NSOperationQueue *theQueue = [[NSOperationQueue alloc] init];
_returnedData = [[CMAccelerometerData alloc] init];
_motionManager = [[CMMotionManager alloc] init];
[_motionManager startAccelerometerUpdatesToQueue:theQueue withHandler:^(CMAccelerometerData *accelerometerData, NSError *error) {
_returnedData = _motionManager.accelerometerData;
int x = _motionManager.accelerometerData.acceleration.x;
int y = _returnedData.acceleration.y;
NSLog(@"X: %i, Y: %i", x, y);
}];
You can either access the accelerometerData.accelleration directly from the CAMotionManager or by creating an instance of CMAccelerometerData and assigning the variables to that. Hope this helps.
您可以直接从 CAMotionManager 访问 accelerometerData.accelleration 或通过创建 CMAccelerometerData 的实例并将变量分配给它。希望这可以帮助。
