Question

I wanted to have some spacing between my TableView cells so I’ve changed my TableView code to this:

- (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView
{
    // Return the number of sections.
    return [_boxs count];
}

- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section
{
    // Return the number of rows in the section.
    return 1;
}

My problem is that my “add line \ object” code is crashing. What changes should I make to this code?

Problematic code:

SomeClass *newObject = [[SomeClass alloc]initWithTitle:@".....  
[_boxs addObject:newObject];
NSIndexPath *indexPath = [NSIndexPath indexPathForRow:_boxs.count-1 inSection:0];
NSArray *indexPaths = [NSArray arrayWithObject:indexPath];    
[self.tableView insertRowsAtIndexPaths:indexPaths withRowAnimation:NO];    
[self.tableView selectRowAtIndexPath:indexPath animated:NO scrollPosition:UITableViewScrollPositionMiddle];
[self performSegueWithIdentifier:@"FirstDetailsSegue" sender:self ];

-boxs is a NSMutableArray.

This is the error I’m getting: * Terminating app due to uncaught exception ‘NSInternalInconsistencyException’, reason: ‘attempt to insert row 7 into section 0, but there are only 1 rows in section 0 after the update’

Answer 1

You have switched your row and column in the line where you are creating NSIndexPath. You need to modify your code as,

NSIndexPath *indexPath = [NSIndexPath indexPathForRow:0 inSection:_boxs.count-1];

If you were planning to use only one section and multiple rows in that you should change your delegate methods to return only 1 section and [_boxs count] rows. In that case your code would have worked.

As per you comment, looks like you want to insert a new section and not a row. Try this,

[self.tableView insertSections:[NSIndexSet indexSetWithIndex:_boxs.count-1] withRowAnimation:UITableViewRowAnimationAutomatic];

You can remove your insertRow line from your code.