UItextfields autofocus

Question

i have 6 textfields named digit1,digit2..etc upto digit6 added as a subview over a view. i want the digit2 textfield to autofocus once the user enters a digit in the digit1 textfield and similarly digit3 should autofocus when a digit is entered in digit2 textfield.Below shown is the code i tried.

-(BOOL)textField:(UITextField *)textField shouldChangeCharactersInRange:(NSRange)range  replacementString:(NSString *)string
{
    if(textField.text.length>=1)
    {
        [textField resignFirstResponder];
        UITextField *_textField=(UITextField*) [self.view viewWithTag:textField.tag+1];
        [_textField becomeFirstResponder];
    }
    return TRUE;
} 

What happens here is when i enter a digit in digit1 it dosent appear in digit 1 but it appears in digit2 and also when i click delete button the control is transfered to the subsequent textfields rather than deleting the text in the current textfield.Please help me to fix this.

Answer 1

I found the solution

-(BOOL)textField:(UITextField *)textField shouldChangeCharactersInRange:(NSRange)range  replacementString:(NSString *)string
{

    NSString *str = [textField.text stringByReplacingCharactersInRange:range withString:string];
    if( [str length] > 0 ){
        textField.text = string;
        UIResponder* nextResponder = [textField.superview viewWithTag:(textField.tag + 1)];
        if (nextResponder) {
            [nextResponder becomeFirstResponder];
        }
        return NO;
    }    
    return YES;

}