objective c - Addressbook Modified Date in Xcode -

i creating application in used update contacts sqlite database on rewrite actions. used fetch contacts addressbook of iphone on user's permission everytime user logged in , insert database on main thread.

i don't want insert iphone contacts everytime database when user login exceeding logged in time , not approach, if addressbook of iphone not modified database insertion happening on each loggin.

this how fetching contacts

nsarray *thepeople = (__bridge nsarray *)abaddressbookcopyarrayofallpeople(_addressbook);       nsmutablearray * _allpeoplesdictarr = [nsmutablearray array];     (id person in thepeople)     {         abmultivalueref phones =(__bridge abmultivalueref)((__bridge nsstring*)abrecordcopyvalue((__bridge abrecordref)(person), kabpersonphoneproperty));          nsstring* name = (__bridge nsstring *)abrecordcopycompositename((__bridge abrecordref)(person));          abrecordref record = (__bridge abrecordref)[thepeople objectatindex:loop];           if(abrecordgetrecordtype(record) ==  kabpersontype) // check execute if person group         {             abrecordid recordid = abrecordgetrecordid(record); // record id address book record              recordidstring = [nsstring stringwithformat:@"%d",recordid]; // record id string record id              nsdate *modificationdate = (__bridge nsdate*) abrecordcopyvalue(record, kabpersonmodificationdateproperty);             nslog(@"modificationdate %@",modificationdate);              firstnamestring = (__bridge nsstring*)abrecordcopyvalue(record,kabpersonfirstnameproperty); // fetch contact first name address book             lastnamestring = (__bridge nsstring*)abrecordcopyvalue(record,kabpersonlastnameproperty); // fetch contact last              nslog(@"%@",firstnamestring);         }      } 

i getting modification dates , can manage in array how know array changed when logged out or terminate application.

there approach can match each , every contacts modification date insertion or creation date present in sqlite database still comparing take time.

so isnt there way check md5checksum or addressbook on whole rather comparing each , every contacts creation date , insertion date. , if addressbook md5checksum modified insertion or updation need happens else dont.

you out of luck. if terminate application, there 0 public api let know there changes. going on contacts necessary, have no other way hear changes.

make sure open feature request @ https://bugreport.apple.com, letting them know api need. post bug report number in questio people can duplicate radar.

from comments of answer, here radar duplicate: rdar://16154022 (thanks oski555)