apple watch CMDeviceMotion 没有给我很好的读数

apple watch CMDeviceMotion is not giving me good readings

目前,我正在记录一堆运动数据并将其保存到文件中。然而,当我绘制数据时,我很难相信我得到了正确的读数。这是我的手表代码:

- (IBAction)startStopRecording {
    if (!recording){
        NSLog(@"starting to record");
        recording = YES;
        data = [[NSMutableArray alloc] init];
        [self.startRecording setTitle:@"Stop Recording"];
        if (self.motionManager.deviceMotionAvailable) {
            [self.motionManager startDeviceMotionUpdatesToQueue:[NSOperationQueue currentQueue] withHandler:^(CMDeviceMotion *motion, NSError *error) {
                [data addObject:[NSString stringWithFormat:@"%f, %f, %f, %f, %f, %f, %f, %f, %f", motion.attitude.pitch, motion.attitude.roll, motion.attitude.yaw, motion.userAcceleration.x, motion.userAcceleration.y, motion.userAcceleration.z, motion.rotationRate.x, motion.rotationRate.y, motion.rotationRate.z]];
                NSLog(@".");
            }];
        }
    }else{
        recording = NO;
        NSLog(@"stopping recording");
        [self.motionManager stopDeviceMotionUpdates];
        [self.startRecording setTitle:@"Start Recording"];
        [InterfaceController openParentApplication:@{ @"data": data } reply:^(NSDictionary *replyInfo, NSError *error) {
            NSLog(@"Data has been saved.");
            NSLog(@"replyInfo %@", replyInfo);
        }];
    }
}

父应用程序只是将所有数据写入一个文件。我记录了手表在所有三个轴上来回旋转(俯仰,然后滚动,然后偏航):

然后当我绘制数据时,这就是我得到的:

偏航噪音太大,根本看不到信号。在向三个不同方向猛拉手表后绘制加速度时,我也遇到了类似的问题。我可以看到加速度尖峰,但它们似乎与方向无关。关于如何改进这个的任何想法?我错过了什么吗?我的手表传感器会不会坏了?

原因是因为我实际上并没有从手表中提取数据。它正在从 phone 中提取数据。为了提取数据(目前只能从手表获取 acc 数据),您需要安装 watchOS2(目前处于测试阶段)。否则手表只会从 phone.

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