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What are convenience initializers and what are the benefits of using them in Swift?

A convenience initializer is intended to provide an alternate or more convenient way to initialize an instance of the class. Convenience initializers can only call other initializers of the same class and are not able to override the designated initializers.

Benefits of using convenience initializers:

  • In the case of a complex class, you can provide different ways to initialize the class based on different use cases.
  • They can make it easier for other developers to understand how to use your class by providing a clear and concise way to create instances of the class.
  • They can be used to provide default property values for your class, making it easier to create instances of the class with minimal code.

What are the differences between escaping and non-escaping in Swift?

They both are used to describe the life of closure in Swift. However, they do have some differences.

  • If the closure is escaped, it can be retained by iOS and can be retrieved anytime. While non-escaping closure means it cannot be retained and will be deallocated after the function completes.
  • For asynchronous tasks such as networking requests, escaping closure is useful as it can be retained and called later.
  • For synchronous tasks non-scaping closure is useful where closure is only needed for the duration of the function call.

iOS Good Practices

Build an iOS development portfolio online to showcase your work

Being a mobile app developer, you can put your work together in your portfolio. As soon as you learn a new skill, you can start showing it off to others. Even projects that you complete as part of your coursework can serve as examples of what you can do, and form the basis for your professional portfolio. As you gain more experience, you’ll want to limit your portfolio to your very best work.

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