Sample of how to add a glow to a UITextField, for something like active control, or error, etc.

hightlight.m

- (void)highlightControl: (UITextField *) textField{
    ;
//    textField.layer.cornerRadius = 5;
//    textField.clipsToBounds = YES;
//    textField.layer.borderWidth = 1;
//    textField.layer.borderColor =[[UIColor redColor] CGColor];
    
    textField.layer.masksToBounds = NO;
    textField.layer.shadowColor = [[UIColor redColor] CGColor];
    textField.layer.shadowOffset = CGSizeZero;
    textField.layer.shadowRadius = 5.0f;
    textField.layer.shadowOpacity = 1.0;

    
}