I need to tag my images with location details. If I wish to enable/disable the geotagging, I should do it on a button click. (like, we can enable/disable the location details while we chat using Whatsapp, Facebook, Viber etc.).
This is not related to Worklight really.
Worklight embeds Cordova inside the generated project.
You can take the picture using Cordova APIs as well as add the location the image was snapped at.
Here is one reference: http://developer.nokia.com/community/wiki/Camera_Pic_%26_GeoTagging_App_using_PhoneGap
As for the UI, to disable/enable, this is purely applicative. Once you get the image taking and tagging to work, you can base this on "button clicks".