Set Required Text Fields - Red

SetRequiredTextField.h

// Set Required TextField red on the outside
// Simple Implementation:
// 1. Set a property for UITextField, ex: textField
// 2. in ViewWillAppear call [self setRequiredTextFieldStyle:self.textField];
-(void)setRequiredTextFieldStyle:(UITextField*)textField
{
    textField.layer.shadowColor = [UIColor redColor].CGColor;
    textField.layer.shadowRadius = 4.0;
    textField.layer.shadowOpacity = 0.9;
    textField.layer.shadowOffset = CGSizeZero;
    textField.layer.masksToBounds = false;
}