swift - Swift 语言中如何使用私有(private)属性？

Question

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Answer 1

更新:

从 Xcode 6 beta 4 开始，Swift 具有访问控制 - https://developer.apple.com/swift/blog/?id=5

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Swift 还没有访问修饰符。但是there are plans to add them in the future

上面链接的线程中也提到了一些解决方法，比如使用嵌套类:

import Foundation

class KSPoint {

    /*!
     * Inner class to hide the helper functions from codesense.
     */
    class _KSPointInner {
        class func distance(point p1 : KSPoint, toPoint p2 : KSPoint) -> Double {
            return sqrt(pow(Double(p2.x - p1.x), 2) + pow(Double(p2.y - p1.y), 2))
        }
    }

    var x : Int

    var y : Int

    init(x : Int = 0, y : Int = 0) {
        self.x = x
        self.y = y
    }

    func distance(point : KSPoint, toPoint : KSPoint) -> Double {
        return _KSPointInner.distance(point: point, toPoint: toPoint)
    }
}