我想使用Apple Watch的历史加速度计数据,我的accDataList总是为零。我在类的init函数中实例化了CMSensorRecorder。有人之前有过这个问题吗?
func startMovementDetection(){
self.cmSensorRecorder?.recordAccelerometerFor(self.recorderDuration)
self.startDate = NSDate()
}
func extractHistoricalAccelerometerData(){
var accDataList = self.cmSensorRecorder!.accelerometerDataFrom(self.startDate, to: NSDate())
NSLog("AccDataList : \(accDataList)")
if accDataList != nil {
accDataList = accDataList as CMSensorDataList
for accData in accDataList {
self.addHistoricalAccDataToMovementArray((accData as? CMRecordedAccelerometerData)?.acceleration)
}
self.sendDataToIphone()
}
}
日志看起来像这样:
2015-07-11 22:02:55.279 emmoveDataWatchOS Extension [2158:2428612]开始录制
2015-07-11 22:02:55.279 emmoveDataWatchOS Extension [2158:2428612] AW:开始动作更新
2015-07-11 22:02:55.279 emmoveDataWatchOS Extension [2158:2428612] AW EMWatchManager:startMovementDetection
2015-07-11 22:02:55.279 emmoveDataWatchOS Extension [2158:2428612]可选(CMSensorRecorder:0x797733d0)
2015-07-11 22:10:51.483 emmoveDataWatchOS Extension [2158:2428612] AW:停止动作更新
2015-07-11 22:10:51.484 emmoveDataWatchOS Extension [2158:2428612]从Optional(2015-07-11 20:02:55 +0000)中提取数据到2015-07-11 20:10:51 + 0000
2015-07-11 22:10:51.484 emmoveDataWatchOS Extension [2158:2428612]可选(CMSensorRecorder:0x797733d0)
2015-07-11 22:10:51.486 emmoveDataWatchOS Extension [2158:2428612] AccDataList:nil
答案 0 :(得分:0)
也许你可以尝试
func startMovementDetection(){
self.startDate = NSDate()
self.cmSensorRecorder?.recordAccelerometerFor(self.recorderDuration)
}
答案 1 :(得分:0)
CMSensorRecorder也有一个错误:你应该等待3到5分钟才能重启你的录音机,否则列表将总是返回nil。(你可以观看Apple的视频了解更多细节。)
答案 2 :(得分:0)
我遇到了同样的问题,在这篇文章中找到了解决方案:
https://forums.developer.apple.com/thread/15470
"在开始重新录制时,显然不喜欢将充电器插入手表"
只需将设备与充电器断开即可。有道理,但当然没有在任何地方正式记录......
答案 3 :(得分:0)
确保已启用“设置”>“隐私”>“运动和健身”>“健身跟踪”。
如果禁用,CMSensorRecorder.accelerometerData()
似乎总是返回nil,即使
CMSensorRecorder.isAccelerometerRecordingAvailable() == true
和
CMSensorRecorder.authorizationStatus() == .authorized