objective c - how to edit or sketch the taken picture by using AVCaptureSession in iPhone -


i working on 1 application in user have capture photo of faults in building location. after capturing photo user can comment below photo can sketch arrow or circle(for eg. paint software in windows computer) on picture show fault.

there 1 app on app store "penultimate". want similar kind of functions app.

does have idea how this? in advance.


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