编码/解码Swift的枚举（Xcode 6.1） [英] Encode/Decode enum for Swift (Xcode 6.1)

问题描述

我有

var priority : Priority! = Priority.defaultPriority

func encodeWithCoder(aCoder: NSCoder) {
        aCoder.encodeInteger(priority.toRaw(), forKey: "priority") //toRaw may not yield the result I am expecting
    }

    required init(coder aDecoder: NSCoder) {
        priority = aDecoder.decodeIntegerForKey("priority") //complaining about conflicting types
    }

其枚举如下：

enum Priority : Int {
        case defaultPriority = 0
        case lowPriority = 1
        case mediumPriority = 2
        case highPriority = 3
    }

这是编码/解码的最好方法是什么？

What is the best way to encode/decode this?

推荐答案

Priority.init（rawValue：）应该可以工作。

func encodeWithCoder(aCoder: NSCoder) {
    aCoder.encodeInteger(priority.rawValue, forKey: "priority")
}

required init(coder aDecoder: NSCoder) {
    priority = Priority(rawValue: aDecoder.decodeIntegerForKey("priority"))
}

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