Question

I have n sections (known amount) and X rows in each section (unknown amount. Each row has a UITextField. When the user taps the “Done” button I want to iterate through each cell and do some conditional tests with the UITextField. If the tests pass data from each cell is written to a database. If not, then a UIAlert is shown. What is the best way to loop through the rows and if there is a more elegant solution to this please do advise.

Answer 1

If you only want to iterate through the visible cells, then use

NSArray *cells = [tableView visibleCells];

If you want all cells of the table view, then use this:

NSMutableArray *cells = [[NSMutableArray alloc] init];
for (NSInteger j = 0; j < [tableView numberOfSections]; ++j)
{
    for (NSInteger i = 0; i < [tableView numberOfRowsInSection:j]; ++i)
    {
        [cells addObject:[tableView cellForRowAtIndexPath:[NSIndexPath indexPathForRow:i inSection:j]]];
    }
}

Now you can iterate through all cells:
(CustomTableViewCell is a class, which contains the property textField of the type UITextField)

for (CustomTableViewCell *cell in cells)
{
    UITextField *textField = [cell textField];
    NSLog(@"%@"; [textField text]);
}