What are the changes in Swift 2.0?
Swift version: 5.1
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
guardkeyword 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
deferkeyword - 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
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Available from iOS 7.0
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This is part of the Swift Knowledge Base, a free, searchable collection of solutions for common iOS questions.
