ios - index 0 beyond bounds for empty array' libc++abi.dylib: terminate called throwing an exception -

ios - index 0 beyond bounds for empty array' libc++abi.dylib: terminate called throwing an exception -

i new xcode please guide me right error, code is,

//set our mapview [mapviewc setregion:myregion animated:no]; cllocation *somelocation=[[cllocation alloc]initwithlatitude:latitude longitude:longitude]; clgeocoder *geocoder = [[clgeocoder alloc] init]; [geocoder reversegeocodelocation:somelocation completionhandler:^(nsarray *placemarks, nserror *error) { nsdictionary *dictionary = [[placemarks objectatindex:0] addressdictionary]; addressoutlet=[dictionary valueforkey:@"street"]; city=[dictionary valueforkey:@"city"]; state=[dictionary valueforkey:@"state"]; if (addressoutlet!=null&&city!=null) { nsstring *subtitle=[nsstring stringwithformat:@"%@,%@,%@",addressoutlet,city,state]; cell.detailtextlabel.text=subtitle; } else if (addressoutlet==null&&city!=null) { nsstring *subtitle=[nsstring stringwithformat:@"%@,%@,",city,state]; cell.detailtextlabel.text=subtitle; } else if (addressoutlet!=null&&city==null) { nsstring *subtitle=[nsstring stringwithformat:@"%@,%@,",addressoutlet,state]; cell.detailtextlabel.text=subtitle; } else if(addressoutlet==null&&city==null) { nsstring *subtitle=[nsstring stringwithformat:@"%@",state]; cell.detailtextlabel.text=subtitle; } }];

thanks in advance.

ok array can empty, in case next statement cause exception:

nsdictionary *dictionary = [[placemarks objectatindex:0] addressdictionary]; // ^

so guard against it, like:

if ([placemarks count] > 0) { nsdictionary *dictionary = [[placemarks objectatindex:0] addressdictionary]; .... }

i haven't read api docs completion handler, can probably test if error non-nil , deed accordingly (i.e. if error != nil respond error, else process placemarks array).

ios objective-c indexoutofboundsexception