One unwelcome quirk of Swift before 2.2 was that selectors could be written as strings, like this:
navigationItem.rightBarButtonItem = UIBarButtonItem(title: "Tap!", style: .Plain, target: self, action: "buttonTaped")If you look closely, I wrote "buttonTaped" rather than "buttonTapped", but Xcode wasn't able to notify me of my mistake if either of those methods didn't exist.
This has been resolved as of Swift 2.2: using strings for selectors has been deprecated, and you should now write #selector(buttonTapped) in that code above. If the buttonTapped() method doesn't exist, you'll get a compile error – another whole class of bugs eliminated at compile time!
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Other changes in Swift 2.2…
- ++ and -- are deprecated
- Traditional C-style for loops are deprecated
- Comparing tuples
- Tuple splat syntax is deprecated
- More keywords can be used as argument labels
- Variable parameters have been deprecated
- Renamed debug identifiers: line, function, file
- Compile-time Swift version checking
Download all Swift 2.2 changes as a playground Link to Swift 2.2 changes
