下面是我的代碼片段:分配值在覈心數據對象
NSFetchRequest *request= [[NSFetchRequest alloc] init];
NSEntityDescription *entity = [NSEntityDescription entityForName:@"Login" inManagedObjectContext:self.managedObjectContext];
NSPredicate *predicate =[NSPredicate predicateWithFormat:@"userid==%@ AND password==%@",useridentered, passwordentered];
[request setEntity:entity];
[request setPredicate:predicate];
NSError *anyError=Nil;
NSArray *fetchedObjects = [self.managedObjectContext executeFetchRequest:request error:&anyError];
Login *login = [fetchedObjects objectAtIndex:0];
Information *information = [NSEntityDescription insertNewObjectForEntityForName:@"Information" inManagedObjectContext:self.managedObjectContext];
login.information = information;
login.information.title = informationTitleTextView.text;
login.information.info_1 = information1textview.text;
login.information.info_2 = information2textview.text;
[self.managedObjectContext save:nil]; // write to database
NSLog(@"login.information %@",login.information.title);
NSLog(@"login.title %@", login.userid);
[self.delegate savebuttontapped:self];
的問題是,它工作正常的第一次。但是當我再次爲同一用戶添加信息時,它會覆蓋現有的信息。如何確保它被寫入下一行?
可以格式化你的代碼。 – iamsult 2012-03-10 07:44:26
@iamsult我應該做什麼格式? – user1253637 2012-03-10 08:03:32
您確定要將密碼保存到數據庫嗎? – Sulthan 2012-03-10 08:19:13