ios - Store Array into NSUserDefaults -

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i've got small problem permanently storing array using nsuserdefaults.

extract of viewcontroller.m

@property (strong, nonatomic) nsmutablearray *locationarray;  - (ibaction)onaddclick:(id)sender {     nslog(@"onaddclick");     cllocationdegrees lat = self.mapview.userlocation.location.coordinate.latitude;     cllocationdegrees longi = self.mapview.userlocation.location.coordinate.longitude;     cllocation *currentlocation = [[cllocation alloc] initwithlatitude:lat longitude:longi];     [self.locationarray addobject:currentlocation];      nsdata *data = [nskeyedarchiver archiveddatawithrootobject:self.locationarray];     [[nsuserdefaults standarduserdefaults] setobject:data forkey:@"locationdata"];     [[nsuserdefaults standarduserdefaults] synchronize];  }

and in locationtableviewcontroller.m want retrieve array:

    nsdata* data = [[nsuserdefaults standarduserdefaults] objectforkey:@"locationdata"];     self.locationarray = [nskeyedunarchiver unarchiveobjectwithdata:data];      if (data != nil) {         nslog(@"found data");     }      if (self.locationarray.count > 0) {         nslog(@"found array");     }

when dont close app, works fine , can retrieve data userdefaults.. after closing, data doesn't exist anymore... thought nsuserdefaults designed store data permanently? tips?

i think problem archived array object contains cllocation object, nsuserdefault save types of objects nsdata, nsnumber, nsstring, nsarray, , object contained in nsarray should 1 of these types.

so archiveddatawithrootobject each cllocation object nsarray, means nsarray contains nsdata in , try again.


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