無法將'__NSCFNumber'（0x10e59f3c0）類型的值轉換爲'NSString'（0x10dba7ad8）swift 3

Question

我一直在試圖弄清楚這一天，現在幾天...這是我的原始代碼：

if let ratingDic = dictionary["rating"] as? [String: Any], 
     let ratingId = ratingDic["id"] { 
     searchResult.ratingID = ratingId as! String 
    } 

這裏是我的API：

"amount" = "50.00"; 
"rating" =  { 
    "name" = "Platinum"; 
    "id" = 5 

我敢肯定我需要使用 「valueForKey」，所以這裏是我更新的代碼：

if let ratingDic = dictionary["rating"] as? [String: Any], 
     //let ratingId = ratingDic["id"] { 
     let ratingId = [ratingDic.valueForKey("id")!] { 
     searchResult.ratingID = ratingId as! Number 
    } 

如何曾經，現在我收到了「類型字符串值：任何沒有成員‘valueForKey’

Answer 1

沒關係，我幾乎忘了實際變量更改爲‘雙師型’或數字

var ratingID = 0.0 

，而不是

var ratingID = "" 

和現在的代碼讀取

if let ratingDic = dictionary["rating"] as? [String: Any], 
     let ratingId = ratingDic["id"] { 
     searchResult.ratingID = ratingId as! Double 
    }