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Swift中NSData與NSDictionary之間的相互轉換

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使用NSKeyedUnarchiver類來進行相互轉換

1、NSDictionary轉NSData

var dictionaryExample : [String:AnyObject] = ["user":"UserName", "pass":"password", "token":"0123456789", "image":0] 
let dataExample : NSData = NSKeyedArchiver.archivedDataWithRootObject(dictionaryExample)

2、NSData轉NSDictionary

let dictionary:NSDictionary = NSKeyedUnarchiver.unarchiveObjectWithData(dataExample)! as NSDictionary