Using Core Data and in insertMethod App crashes and give NSInternalInconsistencyException with error message Context already has a coordinator
问题 i am implementing a core data example in xcode 4.2 at insertMethod (in MasterViewController.m class) my app crashes with a NSInternalInconsistencyException and error message: Context already has a coordinator; cannot replace. can any buddy tell me the meaning of this exception and error message insert method given below:- (void)insertNewObject { detailViewControllerObj = [[DetailViewController alloc]initWithNibName:@"DetailViewController" bundle:nil]; detailViewControllerObj.delegate = self;