一.输入
1.Json字符串
let jsonStr = "{\"name\":\"wall\",\"age\":\"22\",\"hobby\":\"ball\"}"
2.Json对象
let jsonStr = "{\"name\":\"wall\",\"age\":\"22\",\"hobby\":\"ball\"}" let jsonData=jsonStr.data(using: String.Encoding.utf8, allowLossyConversion: false) let json=try? JSONSerialization.jsonObject(with: jsonData, options: .mutableContainers)
二.输出
1.Json对象
{ "name" : "wall", "age" : "22", "hobby" : "ball" }
2.Json字符串
{"name":"wall","age":"22","hobby":"ball"}
三.相互转换
1.Json字符串转Json对象
let jsonStr = "{\"name\":\"wall\",\"age\":\"22\",\"hobby\":\"ball\"}" let jsonData=jsonStr.data(using: String.Encoding.utf8, allowLossyConversion: false) let json=try? JSONSerialization.jsonObject(with: jsonData, options: .mutableContainers)
2.Json对象转Json字符串
let data = try? JSONSerialization.data(withJSONObject: json, options: []) let jsonStr = String(data: data, encoding: String.Encoding.utf8)3.Json字符串转字典
let jsonStr = "{\"name\":\"wall\",\"age\":\"22\",\"hobby\":\"ball\"}" let jsonData=jsonStr.data(using: String.Encoding.utf8, allowLossyConversion: false) let json=try? JSONSerialization.jsonObject(with: jsonData, options: .mutableContainers) if json !=nil { let dict=json as! NSDictionary }
4.字典转Json字符串
let data = try? JSONSerialization.data(withJSONObject: dict, options: []) let jsonStr = String(data: data, encoding: String.Encoding.utf8)