Show GPS availability and Accuracy in Iphone SDK

Question

How to program to show the GPS availability and Accuracy level in an iphone? and it has to wipe the previous lat, lon info in label.

Answer 1

There is a class in iOS sdk called CLLocationManager. Go though its documentation in the XCode or look for some sample example.
http://mobileorchard.com/hello-there-a-corelocation-tutorial/

Answer 2

CLLocationManager has a method locationServicesEnabled to check if the service is enabled or not

[CLLocationManager locationServicesEnabled]