Information Hiding the “Swifter” way?

Question

I have a question regarding object oriented design principles and Swift. I am pretty familiar with Java and I am currently taking a udacity course to get a first hands on in Swi

Answer 1

I do it a bit like in Obj-C:

class MyClass
  private var _something:Int
  var something:Int {
    get {return _something}
// optional: set { _something = newValue }
  }
  init() { _something = 99 }
}

...
let c = MyClass()
let v = c.something

Above is a primitive example, but handled stringent it works as a good pattern.

Answer 2

You can restrict external property manipulation, by marking the property public for reading and private for writing, as described in the documentation:

class RecordedAudio: NSObject {

    public private(set) let filePathUrl: NSURL!
    public private(set) let title: String?

    init(filePathUrl: NSURL, title: String?) {
        self.filePathUrl = filePathUrl
        self.title = title
    }

}

// in another file

let audio = RecordedAudio(filePathUrl: myUrl, title: myTitle)

let url = audio.filePathUrl // works, returns the url
audio.filePathUrl = newUrl // doesn't compile