Swift 4无法读取数据，因为格式不正确

我是SWIFT的新手。 我开发项目来学习如何解析JSON。 我试图将JSON解析为struct 。 我试着这样做。 所以我得到像Err这样的错误数据无法读取，因为它的格式不正确。 我做错了什么？ 此外，我试图使用Alamofire，但我没有找到解析它的方法结构。

func getData(){ let gitUrl = URL(string: "http://95.46.99.250:9095/api/v1/institution-categories") URLSession.shared.dataTask(with: gitUrl!) { (data, response , error) in let data = data print(data) do { let decoder = JSONDecoder() let gitData = try decoder.decode([Root].self, from: data!) } catch let err { print("\nErr", err.localizedDescription) } }.resume() } 

结构

 struct Root: Codable { let data: [InnerItem] } struct InnerItem:Codable { let id: Int? let image: String? let name: String? private enum CodingKeys : String, CodingKey { case id = "id", image = "image", name = "name" } } 

JSON

 { "data": [ { "id": 1, "name": "Пабы и бары", "image": "http://95.46.99.250:9095/storage/photos/[e-mail]" }, { "id": 2, "name": "Кафе", "image": "http://95.46.99.250:9095/storage/photos/[e-mail]" }, { "id": 3, "name": "Ночной клуб", "image": "http://95.46.99.250:9095/storage/photos/0201f7523bc2028f174710b51379e432.png" }, { "id": 4, "name": "Ресторан", "image": "http://95.46.99.250:9095/storage/photos/[e-mail]" }, { "id": 5, "name": "Караоке-клуб", "image": "http://95.46.99.250:9095/storage/photos/microphone.png" }, { "id": 6, "name": "Суши-бар", "image": "http://95.46.99.250:9095/storage/photos/sushi.png" }, { "id": 7, "name": "Пиццерии", "image": "http://95.46.99.250:9095/storage/photos/pizza.png" }, { "id": 8, "name": "Кальянная", "image": "http://95.46.99.250:9095/storage/photos/c111d1e5ad6b90b61ac36836d220ebba.png" }, { "id": 9, "name": "Общая", "image": "http://95.46.99.250:9095/storage/photos/Group [e-mail]" } ] } 

Answer 1

尝试这个

 let gitData = try decoder.decode(Root.self, from: data!) 

遍历您的数据

 for singleData in gitData.data where (singleData.name ?? "") == "Cafe" { print(singleData.image) }