swift 可编码

Posted 2021-05-19

json格式如下
```json
{
    "AP name": "AP888",
    "Band": "2.4G",
    "Block": "C",
    "Floor": "15",
    "Location": "C09-ST1",
    "SSID": "OUHK-Staff"
}
```

我使用了[Paste JSON as Code • quicktype](https://itunes.apple.com/hk/app/paste-json-as-code-quicktype/id1330801220?mt=12)
![IMAGE](quiver-image-url/067C2AC04741309C9A807C89DDE4914A.jpg =1392x863)

```swift
do{
  let decoder = JSONDecoder()
  let wifiInfo = try decoder.decode(WiFi.self, from: (data!))
  print(wifiInfo.location) 
}catch let error{
  print(error)
}
```
> Result : C09-ST1

-----

## to json

```swift
import UIKit
import Firebase

class User:Codable {
    
    let email: String
    var studentId: String?
    let name: String
    var persistedFaceIds: [String:String]?
    var personId: String?
    
    init() {
        self.email = (Auth.auth().currentUser?.email)!
        self.name = (Auth.auth().currentUser?.displayName)!
        self.persistedFaceIds = [:]
        self.studentId = ""
        self.personId = ""
    }
    
    func getJson() -> String {
        let encoder = JSONEncoder()
        encoder.outputFormatting = .prettyPrinted
        let data = try! encoder.encode(self)// self = 當前user
        let encodedString = String(data: data, encoding: .utf8)!
        return encodedString
    }
    
    func getData() -> Data {
        let encoder = JSONEncoder()
        encoder.outputFormatting = .prettyPrinted
        let data = try! encoder.encode(self)
        return data
    }
    
}

```

//Empty