UITextField should have only positive number

Question

I need to validate a UITextField. I want only positive integers to be entered in it. How can I achieve that?

Answer 1

Set delegate to your UITextField ivar. Set keyboardType property to UIKeyboardTypeNumberPad Write this code.

- (BOOL)textField:(UITextField *)textField shouldChangeCharactersInRange:(NSRange)range replacementString:(NSString *)string{  
    if ([string isEqualToString:@"-"]){  
        return NO;  
    }  

    return YES;  
}