如何检查是否已启用定位服务以进行应用？

Question

I have application which uses user's location. On start of app loading it asks user for location. How can I check after that if user is accepted to share location in my application?

Answer 1

From CLLocationManager Reference

Returns a Boolean value indicating whether location services are enabled on the device.

• (BOOL)locationServicesEnabled Return Value YES if location services are enabled; NO if they are not.

Discussion The user can enable or disable location services from the Settings application by toggling the Location Services switch in General.

You should check the return value of this method before starting location updates to determine whether the user has location services enabled for the current device. If this method returns NO and you start location updates anyway, the Core Location framework prompts the user to confirm whether location services should be reenabled

So if your app has parts that runs without locations, then dont start location updates at app start. once the user chooses a feature that needs location updates read the value of [CLLocationManager locationServicesEnabled] .
if false post an alert, like Apple maps when you press the arrow (Locate me) button.
if true start location updates.