Question

While replacing or inserting into an NSMutable array, I am getting exception as:

Terminating app due to uncaught exception ‘NSInternalInconsistencyException’, reason: ‘*** -[NSCFArray replaceObjectAtIndex:withObject:]: mutating method sent to immutable object’

[list replaceObjectAtIndex:indexRow withObject:editcontacts];
//or

[list insertObject:editcontacts atIndex:indexRow];

Answer 1

You are still using an NSArray instead of an NSMutableArray. You need to allocate list as such:

NSMutableArray *list = [[NSMutableArray alloc] init];

See this question