Add real-time validation to UITextField with blocks

Easy block based methods with the opportunity for full customization

NSString *emailPattern = @"^[_a-z0-9-]+(\\.[_a-z0-9-]+)*@[a-z0-9-]+(\\.[a-z0-9-]+)*(\\.[a-z]{2,4})$";
_emailField.validationBlock = ^(NSString *text) {
  return ([text rangeOfString:emailPattern options:NSRegularExpressionSearch].location != NSNotFound );
};
_emailField.postValidationBlock = ^(BOOL valid){
  if ( valid ) {
    _emailStatus.image = [UIImage imageNamed:@"valid"];
  } else {
    _emailStatus.image = [UIImage imageNamed:@"invalid"];
  }
};

If you want to check if a textfield is currently valid (before submitting a form, for example), simply check CCTextField's .valid property

BOOL fieldIsInValidState = _emailField.valid;

Installation

Cocoapods

pod 'CCValidatedTextField', '~> 1.0.1'