问题描述
我开发了一款可以记录距离的步行应用程序，在iOS7，iOS8上，距离虽然有时有时不准确，但大部分都很好，但是在iOS9.0上，距离通常太大，所以我检查
I have developed a walk app that can record distance, on iOS7, iOS8, the distance is mostly fine although sometimes not accurate, but on iOS9.0, the distance often too large, so I check
- (void)locationManager:(CLLocationManager *)manager didUpdateLocations:(NSArray<CLLocation *> *)
Locations方法，并花一些时间来获取这样的位置：A，B，C，但是C的坐标等于A，我认为是很奇怪
Locations method, and find some time get locations like this: A、B、C, but coordinate of C is equal to A, which i think is weird
我发现每秒钟调用一次 startUpdatingLocation ，在摆脱它之后，它会变得更好，但仍然会发生
I find startUpdatingLocation called every seconds, after get rid of it , it gets better, but still happens
这是演示
推荐答案
对于ios 9，您必须设置allowBackgroundLocationUpdates。
For ios 9, you have to set allowsBackgroundLocationUpdates.
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