Swift Dictionary [String:String]到NSMutableDictionary？

Question

我正在尝试创建并在属性中分配Swift Dictionary类型[String : String],这需要一个.当我尝试这个时,我得到错误:SKSpriteNodeuserDataNSMutableDictionary

'[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

没有内置演员.但是你可以使用NSMutableDictionary带字典的初始化器:

var foundationDictionary = NSMutableDictionary(dictionary: dictionary)