What are the changes in Swift 2.0?

Written by Paul Hudson    @twostraws

Swift 2.0 introduced a lot of major language changes. You can read my full article explaining the changes with code examples by clicking here, but here are the highlights:

• Checked exceptions using try/catch
• Automatically synthesized headers
• The guard keyword to check input while unwrapping optionals
• Measuring strings is now done using characters.count (Note: this was later un-done in Swift 4.)
• Delayed code execution using the defer keyword
• You now get mutability warnings if you declare variables that never get changed
• API availability checking is now built right in
• The performSelector() family of functions is now available

Available from iOS 7.0

Did this solution work for you? Please pass it on!

Tweet

Other people are reading…

• How to count matching items in an array
• How to loop over non-nil items in an array
• What is MVVM?
• How to create a custom debug description
• How to add a custom initializer to a struct without losing its memberwise initializer

About the Swift Knowledge Base

This is part of the Swift Knowledge Base, a free, searchable collection of solutions for common iOS questions.