如何將Swift（iOS，Xcode）中的NSDictionary轉換爲Json字符串？

Question

我從以下問題的痛苦.... 我NSDictionary是這樣的：

var dic : NSDictionary = [ "level" : 
    [ 
     ["column" : 0,"down" : 0,"left" : 0,"right" : 0,"row" : 0,"up" : 0], 
     ["column" : 1,"down" : 0,"left" : 0,"right" : 0,"row" : 0,"up" : 0], 
     ["column" : 2,"down" : 0,"left" : 0,"right" : 0,"row" : 0,"up" : 0], 
     ["column" : 0,"down" : 0,"left" : 0,"right" : 0,"row" : 1,"up" : 0], 
     ["column" : 1,"down" : 0,"left" : 0,"right" : 0,"row" : 1,"up" : 0], 
     ["column" : 2,"down" : 0,"left" : 0,"right" : 0,"row" : 1,"up" : 0] 
    ] 
] 

但如果我打印本，

print(dic); or print(「\(dic)」); 

外出時的說就是這樣的：

{ 
    level =  (
       { 
      column = 0; 
      down = 0; 
      left = 0; 
      right = 0; 
      row = 0; 
      up = 0; 
     }, 
       { 
      column = 1; 
      down = 0; 
      left = 0; 
      right = 0; 
      row = 0; 
      up = 0; 
     }, 
       { 
      column = 2; 
      down = 0; 
      left = 0; 
      right = 0; 
      row = 0; 
      up = 0; 
     }, 
       { 
      column = 0; 
      down = 0; 
      left = 0; 
      right = 0; 
      row = 1; 
      up = 0; 
     }, 
       { 
      column = 1; 
      down = 0; 
      left = 0; 
      right = 0; 
      row = 1; 
      up = 0; 
     }, 
       { 
      column = 2; 
      down = 0; 
      left = 0; 
      right = 0; 
      row = 1; 
      up = 0; 
     } 
    ); } 

我如何得到確切的Json字符串？ 在swift中，xcode？

Answer 1

沒有必要實施這種複雜的邏輯，

你可以簡單地這樣做

var jsonData: NSData = NSJSONSerialization.dataWithJSONObject(dictionary, options: NSJSONWritingOptions.PrettyPrinted, error: &error)! 
    if error == nil { 
     return NSString(data: jsonData, encoding: NSUTF8StringEncoding)! as String 
    } 

，如果你想與API服務器發送它，甚至不需要將其轉換爲字符串