guard let userData = responseData["UserProfile"] as? [String : AnyObject] else { return }

var userProfileFieldsDict = [String: String]()
if let profileUsername = userData["Username"] as? NSString {
  userProfileFieldsDict["username"] = String(profileUsername)
}
if let profileReputationpoints = userData["ReputationPoints"] as? NSNumber {
  userProfileFieldsDict["reputation"] = String(profileReputationpoints)
}

但是,在Swift 3中,它会在userProfileFieldsDict [“reputation”]上引发错误

init has been renamed to init(describing:)

我的问题是为什么它会触发该行而不是userProfileFieldsDict [“username”]赋值行,以及如何修复它？我假设它是因为我正在将一个NSNumber转换为String,但我无法理解为什么这很重要.