ios - DesiredAcuracy和DistanceFilter在CoreLocation中的作用是什么，ios

Question

当用户从 iOS 项目中的 CoreLocation 步行时，我正在选取用户的 GPS 坐标，我想选取每 1 米或每 10 秒的纬度和经度，

我可以使用 DesiredAcuracy 和 DistanceFilter 来执行此操作吗？

如果不是，这两个(DesiredAcuracy 和 DistanceFilter)实际上会做什么？

或者我应该创建自己的计时器来完成它吗？

Answer 1

我可以使用 DesiredAcuracy 和 DistanceFilter 这样做吗？ 是的，根据 docs :

期望准确度

The receiver does its best to achieve the requested accuracy; however, the actual accuracy is not guaranteed.

You should assign a value to this property that is appropriate for your usage scenario. For example, if you need the current location only within a kilometer, you should specify kCLLocationAccuracyKilometer and not kCLLocationAccuracyBestForNavigation. Determining a location with greater accuracy requires more time and more power.

在你的情况下，你应该使用 kCLLocationAccuracyKilometer 用于未插入的设备(例如，用户使用它来运行距离)或 kCLLocationAccuracyBestForNavigation 用于插入的设备(例如，在车里)

kCLLocationAccuracyBestForNavigation

Use the highest possible accuracy and combine it with additional sensor data. This level of accuracy is intended for use in navigation applications that require precise position information at all times and are intended to be used only while the device is plugged in.

kCLLocationAccuracyKilometer

Accurate to the nearest kilometer. Available in iOS 2.0 and later.

kCLLocationAccuracyBest

Use the highest-level of accuracy. Available in iOS 2.0 and later.

距离过滤器

This distance is measured relative to the previously delivered location. >Use the value kCLDistanceFilterNone to be notified of all movements. The default value of this property is kCLDistanceFilterNone.

因此，如果您需要频繁的距离更新(即用户必须移动多远才能收到更新)，您应该使用kCLDistanceFilterNone。