Question

I have dynamic number of textfields in my tableview, I put each textfield into a customcell in IB and load the cells by nibName.

I want to validate and show alert as user enters data, also when editingisDone I want to get the input value from user and save it to the relavent object.

for instance these are some delegate methods I can use:

- (void)textFieldDidEndEditing:(UITextField *)textField{
   //save the data
}

- (IBAction)textFieldDoneEditing:(id)sender {
    //hide the keypad when done is pressed
    [sender resignFirstResponder];
}

- (BOOL)textField:(UITextField *)textField shouldChangeCharactersInRange{}

2 questions:

1-When getting user input and validating the input how will I know which textfield’s delegate is fired since there are dynamic numbers of cells and textfields, and how can I manage this?

2-For hiding the keyboard I did this but not sure this is correct;
-In IB I opened the customcell–>right click uitextfield and connect its didEndonExit to FirstResponder‘s textFieldDoneEditing method. This works but I can’t return if I didnt add any chars to textfield. so it forces to write something in order to press the button.

Answer 1

With regards to your first question …

In the following code I’ll assume you have one UITextField in each cell. I’ll also assume you’ve created an UITableViewCell subclass called CustomCell which contains an UITextField.

#pragma mark - UITableViewDataSource 

- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
   static NSString *CellIdentifier = @"CellIdentifier";
   CustomCell *cell = (CustomCell *)[tableView dequeueReusableCellWithIdentifier:CellIdentifier];
   if (!cell)
   {
      cell = [[[CustomCell alloc] initWithStyle:UITableViewCellStyleDefault identifier:CellIdentifier] autorelease];
      cell.textField.tag = indexPath.row;
      cell.textField.delegate = self;
   }
   return cell; 
}

#pragma mark - UITextFieldDelegate 

- (void)textFieldDidEndEditing:(UITextField *)textField
{
   NSLog(@"textField tag: %d", textField.tag); // this will show which textField did end editing ...
}