文章目录

• 1.dictionary转data
• 2.data转dictionary
• 3.data转string
• 4.String转Data

1.dictionary转data

 let dict:Dictionary = ["latitude":latitude,"longitude":longitude]
 let data = try? JSONSerialization.data(withJSONObject: dict, options: [])

2.data转dictionary

  if let any = try?JSONSerialization.jsonObject(with: data!, options: .allowFragments){
                    let dict : Dictionary = any as! Dictionary<String, Any>
                    print(dict)
                }

3.data转string

String(data:data!, encoding: String.Encoding.utf8)

4.String转Data

 let data = jsonStr.data(using: .utf8)

参考博客：
swift——原生的Data与Dictionary互转的方法，及Model自定义
Swift中Data,String,[UInt8]的相互转换（6种互相转换）