異常在斯威夫特

Question

代碼訪問內部詞典：

{ 
    "methodName": "LOGIN", 
    "errorCode": -1, 
    "responseMsg": "Login success", 
    "response": { 
     "userId": 28871, 
     "firstName": "Test", 
     "lastName": "Dentist", 
     "contactId": 28720 
    } 
} 

這就是我得到來自NSURL連接響應。

if response != ""{ 
      var resMsg: String = dataDic["responseMsg"] as String 

      if resMsg == "Login success"{ 
       var resDic: NSDictionary = dataDic["response"] as NSDictionary 
       var userId: String = resDic["userId"] as String 
      } 
     } 

當我嘗試訪問用戶id它給了異常，因爲Exc_Break點exception.It工作正常在目標C.How做我修改代碼來訪問內部dictionary.any幫助將appreciated.thanks提前

Answer 1

你應該嘗試

var userId: NSNumber = resDic["userId"] as NSNumber 

正如你可以看到dataDic關鍵userID的值是一個數字。由於dataDic可以包含字符串，數字和字典，它的類型很可能被推斷爲[String：NSObject]。因此，你應該投爲NSNumber，而不是快速本機類型string