Hi, I'm new for learning not only Swift but also programming. I've been following Food Tracker tutorial and faced error today. First one, this morning, I figured it out with spending an hour and half one google. The lines tutorial gave me didn't work and the lines I fixed was below func imagePickerController(_ picker: UIImagePickerController, didFinishPickingMediaWithInfo info: [UIImagePickerController.InfoKey: Any]) {                  // The info dictionary may contain multiple representations of the image. You want to use the original.         let selectedImage = info[UIImagePickerController.InfoKey.originalImage] as? UIImage and... now I have another error. try to add the button to the stack and Xcode said 'error' The lines are below private func setupButtons() { // Create the button let button = UIButton() button.backgroundColor = UIColor.red // Add constraints button.translatesAutoresizingMaskIntoConstraints = false button.heightAnchor.constraint(equalToConstant: 44.0).isActive = true button.widthAnchor.constraint(equalToConstant: 44.0).isActive = true // Add the button to the stack addArrangedSubview(button) } and error occurs on addArrangedSubview (cannot find 'addArrangedSubview' in scope) I spent another a couple of hours to fix it and thought that it was a good opportunity to improve my skill by fixing it. But I read lots of comments that TF has lots of bugs and it's old. Should I finish this tutorial or stop following it? Please give me advice for the future. Thank you all.