Swift 1.2 gives us an alias for class final properties: static. While class variables may be overridden in subclasses, static variables may not. For example:
class Student: Person {
// THIS ISN'T ALLOWED
override static var count: Int {
return 150
}
// THIS IS ALLOWED
override class var averageAge: Double {
return 19.5
}
}In this usage, static var is merely an alias for final class var.
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Other changes in Swift 1.2…
- The zip() function joins two sequences
- The flatMap() method transforms optionals and arrays
- Closures can now be marked @noescape
- Constants no longer require immediate initialization
- A new Set data structure
- Implicit bridging has been reduced
- Multiple if let bindings
- Typecasting now includes as!
Download all Swift 1.2 changes as a playground Link to Swift 1.2 changes
