访问一个隐藏在函数内部深处的变量，在Swift中使用函数外部2

Question

所以我遇到了一个小障碍，我试图访问一个在Alamofire请求函数内部创建的变量。有一点背景为：

使用SwiftyJSON/Alamofire来访问JSON文件并解析它，有一个访问日期的变量，但日期是RFC 3339格式，现在我创建了一个函数来解析RFC 339中的日期到一个可读的格式，但我现在没有如何访问JSON解析函数中创建的日期变量与日期解析函数一起使用。

//Get the JSON from server 
func getJSON() { 

    Alamofire.request(.GET, "link goes here").responseJSON { (Response) in 

     if let value = Response.result.value { 

      let json = JSON(value) 

      for anItem in json.array! { 

       let title: String? = anItem["Title"].stringValue 
       let date: String? = anItem["Date"].stringValue //trying to access this variable outside the function 
       let body: String? = anItem["Body"].stringValue 
       self.tableTitle.append(title!) 
       self.tableDate.append(date!) 
       self.tableBody.append(body!) 
       print(anItem["Title"].stringValue) 
       print(anItem["Date"].stringValue) 

      } 

      dispatch_async(dispatch_get_main_queue()) { 

       self.tableView.reloadData() 

      } 

     } 

    } 

} 

// this date stuff isn't being used yet, because I have no idea how... 
public func dateForRFC3339DateTimeString(rfc3339DateTimeString: String) -> NSDate? { 

    let enUSPOSIXLocale = NSLocale(localeIdentifier: "en_US_POSIX") 

    let rfc3339DateFormatter = NSDateFormatter() 
    rfc3339DateFormatter.locale = enUSPOSIXLocale 
    rfc3339DateFormatter.dateFormat = "yyyy'-'MM'-'dd'T'HH':'mm':'ss'Z'" 
    rfc3339DateFormatter.timeZone = NSTimeZone(forSecondsFromGMT: 0) 

    return rfc3339DateFormatter.dateFromString(rfc3339DateTimeString) 
} 

public func userVisibleDateTimeStringForRFC3339DateTimeString(rfc3339DateTimeString: String) -> String? { 

    let maybeDate = dateForRFC3339DateTimeString(rfc3339DateTimeString) 
    if let date = maybeDate { 

     let userVisibleDateFromatter = NSDateFormatter() 
     userVisibleDateFromatter.dateStyle = NSDateFormatterStyle.MediumStyle 
     userVisibleDateFromatter.timeStyle = NSDateFormatterStyle.ShortStyle 

     return userVisibleDateFromatter.stringFromDate(date) 

    } else { 

     return nil 

    } 

} 

let finalDateStr = userVisibleDateTimeStringForRFC3339DateTimeString(MasterViewController) //now this is where it gets weird, instead of letting me enter the string in the brackets, it defaults to MasterViewController, now I tried to move the date functions to another .swift file (an empty one) and it doesn't do that anymore 

所以是的，就是这样，如果任何人都可以提供帮助，将不胜感激。

Answer 1

尝试下面的代码，让我知道，如果它的工作原理：

func dateForRFC3339Date(rfc3339Date: NSDate) -> NSDate? { 
     let enUSPOSIXLocale = NSLocale(localeIdentifier: "en_US_POSIX") 
     let rfc3339DateFormatter = NSDateFormatter() 
     rfc3339DateFormatter.locale = enUSPOSIXLocale 
     rfc3339DateFormatter.dateFormat = "yyyy'-'MM'-'dd'T'HH':'mm':'ss'Z'" 
     rfc3339DateFormatter.timeZone = NSTimeZone(forSecondsFromGMT: 0) 
     let dateString = rfc3339DateFormatter.stringFromDate(rfc3339Date) 
     return rfc3339DateFormatter.dateFromString(dateString) 
    } 

，并调用它在你的getJSON()方法，如：

let convertedDate = self.dateForRFC3339Date(rfc3339Date: anItem["Date"])