Delegation

https://www.tutorialspoint.com/ios/ios_delegates.htm

You should do the following:

1. Create a branch from develop, called feature/delegation.
2. Add “+” button to MainViewController in navigation bar, created as UIBarButtonItem.
3. Create a new view controller called CreateEmployeeViewController, which should contain 3 text fields - first name, last name and salary - a label next to each one, describing what those text fields are.
4. Add a handler for “+” button so it shows CreateEmployeeViewController.
5. Add “Save” button to the navigation bar of CreateEmployeeViewController, which reads the text fields, creates a new instance of Employee, returns it to MainViewController and is added to the current organization. Table view of MainViewController should be reloaded and should display newly created employee. Use the delegation pattern.
6. Create a pull request from your branch to develop.

You should be able to answer the following questions:

• What is a protocol?
• What is the difference between required and optional methods?
• May protocols be inherited?
• What is a weak property? Why is it commonly used with delegates?
• What are the options of reloading data in a table view?
• Are there any other ways of passing the data, except of delegation?