Where is cllocation.h

Honey Add a comment. Active Oldest Votes. Hope that helps, a. Improve this answer. Andrew Little Andrew Little 6, 1 1 gold badge 23 23 silver badges 15 15 bronze badges.

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. Andrew Little This is great description and this help me a lot. Thanks for this post. This saves my days. Show 3 more comments. Currently, the iOS platform uses: GPS: very accurate, but high power draw, slow and not always available.

WiFi: lots of power draw, and only works in the city. Can also be flat out wrong eg place you in the wrong city Cell Tower: almost no power draw at all, and works well in the city. Not so great in rural areas. Doesn't exist on some hardware. Accelerometer: slight improvements to other location fixes, but huge power draw.

Gyroscope: slight improvements to other location fixes, but huge power draw. Abhi Beckert Abhi Beckert Whats the difference between high power draw, lots of power draw and huge power draw. GPS uses a fair bit of power. Abhi Beckert , I'm not sure about that.

For WiFi you are probably right, but I get pretty bad accuracy hundreds of meters inside buildings here in the East Village of Manhattan when WiFi has been turned off for a while.

I assume in this situation, cell towers are being used. I also got pretty bad accuracy in Downtown Seattle over meters , inside buildings. Not all buildings have them, especially since some cell network frequencies can travel through walls effectively — eliminating any need for indoor cells. Also 1, metres is decent - in a rural area cell network triangulation can be as bad as , metre accuracy. And what do you mean by Cell Tower: almost no power draw at all, and works well in the city.

Do you mean not every cell tower has the hardware needed for triangulation? This is WWDC, btw. Olie Olie The three functions have been created as a category implementation for the CLLocation class. You can add methods to a class by declaring them in an interface file under a category name and defining them in an implementation file under the same name.

The category name indicates that the methods are additions to a class declared elsewhere, not a new class. You cannot, however, use a category to add additional instance variables to a class. The methods the category adds become part of the class type. Actively scan device characteristics for identification. Use precise geolocation data. Select personalised content.

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