问题
I have an application that needs to keep very precise data about where a user is walking. Will having kCLLocationAccuracyBestForNavigation turned on as opposed to kCLLocationAccuracyBest gain me anything in this situation? Thanks.
回答1:
kCLLocationAccuracyBestForNavigation is better for what you want to achieve as opposed to kCLLocationAccuracyBest.
the only reason not to pick the BestForNavigation is the support of devices with iOS<4.
As a side note, kCLLocationAccuracyBestForNavigation will also be battery eater... but not more than 20% in respect to other (from my personal experience).
As the boys in Apple said:
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.
来源：https://stackoverflow.com/questions/6371744/will-the-kcllocationaccuracybestfornavigation-setting-in-core-location-improve-l