Swift 字典 [字符串 :String] to NSMutableDictionary?

Question

我正在尝试创建并分配一个 Swift Dictionary类型 [String : String]在 SKSpriteNode属性(property)userData这需要 NSMutableDictionary .当我尝试这个时，我得到了错误:

'[String : String]' is not convertible to 'NSMutableDictionary'

谁能指出我正确的方向？

    // USER DATA
    var dictionary: [String : String] = Dictionary()
    dictionary["Orbit"] = orbit
    dictionary["Zone"] = zone
    dictionary["Impact"] = impact
    var foundationDictionary = dictionary as NSMutableDictionary
    neoSprite.userData = foundationDictionary

Answer 1

没有内置的转换。但是您可以使用 NSMutableDictionary 的带有字典的初始化程序:

var foundationDictionary = NSMutableDictionary(dictionary: dictionary)