我如何确定由CLLocationManager返回的位置信息是否有效？ [英] How can i determine if location information returned by CLLocationManager is valid?

问题描述

如何确定CLLocationManager返回的位置信息是否有效？ 解决方案

要查找两件事情，时间戳和hdop（水平精度）。第一个会告诉你什么时候阅读，第二个会告诉你阅读的错误程度。例如1000的hdop会告诉你，测量精确到1000米以内。显然，hdop越低越好。

它们都在Core Location更新中。

How can I determine if location information returned by CLLocationManager is valid?

解决方案

Two things to look for, the timestamp and the hdop (Horizontal Degree of Precision). The first one will tell you when the reading was taken, the second will tell you the level of error in the reading. For example a hdop of 1000 will tell you that the measurement is accurate to within 1000 metres. Obviously the lower the hdop the better.

They are both in the Core Location update you get.

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