what is the problem if program is crash, when click save button?

Question

hi experts,

I have a simple todo list embedded in my main app, I had established it in a separate project, then I add it to my main project carefully, everything is good but, when I write the todo and click save button the program is crash! what is the problem?

my code:

self.navigationItem.rightBarButtonItem =
[[[UIBarButtonItem alloc] initWithBarButtonSystemItem:UIBarButtonSystemItemSave
                                               target:self
                                               action:@selector(save_Clicked:)]
 autorelease];

then the save_Clicked implementation is :

- (void) save_Clicked:(id)sender {
    HomeAppDelegate *appDelegate =
    (HomeAppDelegate *)[[UIApplication sharedApplication] delegate];

    //Create a todo Object.
    todo *todoObj = [[todo alloc] initWithPrimaryKey:0];
    todoObj.todotitle = txttodotitle.text;
    todoObj.tododes = txttododes.text;
    /*
     NSString *temp = [[NSString alloc] initWithString:txttododes.text];
     todoObj.tododes = temp;
     [temp release];
     */
    todoObj.isDirty = NO;
    todoObj.isDetailViewHydrated = YES;

    //Add the object
    [appDelegate addtodo:todoObj];

    //Dismiss the controller.
    [self.navigationController dismissModalViewControllerAnimated:YES];
}

and the error massages output in console is:

2010-06-03 17:12:45.720 Home[29728:207] No Errors 2010-06-03 17:12:45.726 Home[29728:207] WARNING: Using legacy cell layout due to delegate implementation of tableView:accessoryTypeForRowWithIndexPath: in . Please remove your implementation of this method and set the cell properties accessoryType and/or editingAccessoryType to move to the new cell layout behavior. This method will no longer be called in a future release. 2010-06-03 17:12:59.447 Home[29728:207] * Assertion failure in -[todo addtodo], /Users/HOME/Desktop/withretriveAnn/Home copy 5-ToDO/Classes/todo.m:90 2010-06-03 17:12:59.448 Home[29728:207] * Terminating app due to uncaught exception 'NSInternalInconsistencyException', reason: 'Error while creating add statement. 'no such table: todo''

• for sure I used iPhone Database to save the ToDo list.

Answer 1

Check typos in your table names. Entities (and thus tables) start with a capital letter and your error has a lower case. I suspect this is a simple typo of Todo.