我试图用斯威夫特4可编码的功能,但被困在这种情况下,相关值:斯威夫特4解码的,DecodingError:没有与关键
struct Message:Codable {
let message: String
let timestamp: String
let latitude: String
let longitude: String}
这是我的结构。
guard let url = URL(string:"http://localhost:443/api/message") else {return}
var request = URLRequest(url: url)
request.httpMethod = "POST"
request.addValue("application/json", forHTTPHeaderField: "Content-Type")
print("POSTED")
let newPost = Message(message: "Hi", timestamp: "1", latitude: "1.1", longitude: "2.2")
print("NewPost:",newPost)
do {
let jsonBody = try JSONEncoder().encode(newPost)
request.httpBody = jsonBody
} catch let err {
print("jsonBody Error: ",err)
}
let session = URLSession.shared
let task = session.dataTask(with: request){ (data,response,err) in
guard let data = data else {return}
do{
let sendPost = try JSONDecoder().decode(Message.self, from: data)
print("sendPost:\(sendPost)")
}catch let err{
print("Session Error: ",err)
}
}
task.resume()
}
这是我用于发布请求的函数。 在打印(“NewPost:” newPost),它打印
NewPost: Message(message: "Hi", timestamp: "1", latitude: "1.1", longitude: "2.2")
它看着我看到其他的例子, 很相同的,但再有就是总是被抓
Session Error: keyNotFound(DeadDrop.Message.(CodingKeys in _5C64F74710315F52702B56CE54E28C19).message, Swift.DecodingError.Context(codingPath: [], debugDescription: "No value associated with key message (\"message\").", underlyingError: nil))
我一个会话错误只是不明白这是怎么回事!我使用完全相同的结构,它说这没有关键吗?! 感谢您的帮助!
你可以发布什么是你的'数据'打印? –
它与Message对象的编码方式有关。你可以发布Message类的代码吗? – NSAdi
如果我在打印(“Session Error:”,err)后使用print(“DATA:\(data)”),它会打印出“DATA:68 bytes”...我怎么看到里面有什么? @ViniApp – Kei