Swift 中 NSDictionary 到 NSData 和 NSData 到 NSDictionary

Question

我不確定我是否錯誤地使用了字典或數據對象或兩者。 我正在嘗試習慣切換到 swift，但我遇到了一些麻煩。

var dictionaryExample : [String:AnyObject] =
    ["user":"UserName",
     "pass":"password",
    "token":"0123456789",
    "image":0] // image should be either NSData or empty

let dataExample : NSData = dictionaryExample as NSData

我需要NSDictionary編碼為NSData對象以及獲取該NSData對象並將其解碼為NSDictionary 。

非常感謝任何幫助，謝謝。

Answer 1

您可以使用NSKeyedArchiver和NSKeyedUnarchiver

swift 2.0+ 的示例

var dictionaryExample : [String:AnyObject] = ["user":"UserName", "pass":"password", "token":"0123456789", "image":0]
let dataExample : NSData = NSKeyedArchiver.archivedDataWithRootObject(dictionaryExample)
let dictionary:NSDictionary? = NSKeyedUnarchiver.unarchiveObjectWithData(dataExample)! as? NSDictionary

斯威夫特3.0

let dataExample: Data = NSKeyedArchiver.archivedData(withRootObject: dictionaryExample)
let dictionary: Dictionary? = NSKeyedUnarchiver.unarchiveObject(with: dataExample) as! [String : Any]

游樂場截圖

Answer 2

NSPropertyListSerialization 可能是另一種解決方案。

// Swift Dictionary To Data.
var data = try NSPropertyListSerialization.dataWithPropertyList(dictionaryExample, format: NSPropertyListFormat.BinaryFormat_v1_0, options: 0)

// Data to Swift Dictionary
var dicFromData = (try NSPropertyListSerialization.propertyListWithData(data, options: NSPropertyListReadOptions.Immutable, format: nil)) as! Dictionary<String, AnyObject>

Answer 3

斯威夫特 5

正如@yuyeqingshan 所說， PropertyListSerialization是一個不錯的選擇

       // Swift Dictionary To Data.
        do {
            let data = try PropertyListSerialization.data(fromPropertyList: [:], format: PropertyListSerialization.PropertyListFormat.binary, options: 0)
            // do sth
        } catch{
            print(error)
        }


        // Data to Swift Dictionary
        do {
            let dicFromData = try PropertyListSerialization.propertyList(from: data, options: PropertyListSerialization.ReadOptions.mutableContainers, format: nil)
            if let dict = dicFromData as? [String: Any]{
                // do sth
            }
        } catch{
            print(error)
        }

Answer 4

對於 Swift 3：

let data = try PropertyListSerialization.data(fromPropertyList: authResponse, format: PropertyListSerialization.PropertyListFormat.binary, options: 0)

Answer 5

Leo 的回答給了我構建時間錯誤，因為NSData與Data 。 函數unarchiveObject(with:)接受一個Data類型的變量，而函數unarchiveTopLevelObjectWithData()接受一個NSData類型的變量。

這是一個有效的Swift 3答案：

var names : NSDictionary = ["name":["John Smith"], "age": 35]
let namesData : NSData = NSKeyedArchiver.archivedData(withRootObject: names) as NSData
do{
    let backToNames = try NSKeyedUnarchiver.unarchiveTopLevelObjectWithData(namesData) as! NSDictionary
    print(backToNames)
}catch{
    print("Unable to successfully convert NSData to NSDictionary")
}

Answer 6

對於 Swift 4 -

let dictionaryExample : [String:AnyObject] = ["user":"UserName" as AnyObject, "pass":"password" as AnyObject, "token":"0123456789" as AnyObject, "image":0 as AnyObject]
    let dataExample : NSData = NSKeyedArchiver.archivedData(withRootObject: dictionaryExample) as NSData
    let dictionary:NSDictionary? = NSKeyedUnarchiver.unarchiveObject(with: dataExample as Data)! as? NSDictionary