ios Swift 4 无法读取数据，因为它的格式不正确
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Swift 4 The data couldn’t be read because it isn’t in the correct format
提问by George Heints
I am developing a project to learn how to parse JSON. I am trying to parse JSONto a struct. I am trying to do it using the code that comes next but I am getting the following error:
我正在开发一个项目来学习如何解析 JSON。我正在尝试将JSON解析为struct。我正在尝试使用接下来的代码来执行此操作，但出现以下错误：
Err The data couldn't be read because it isn't in the correct format.
Err 无法读取数据，因为它的格式不正确。
What am I doing wrong? Also I tried to use Alamofire but I didn't find way to parse it to struct.
我究竟做错了什么？我也尝试使用 Alamofire，但我没有找到将它解析为 struct 的方法。
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()
}
Struct
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
JSON
{
"data": [
{
"id": 1,
"name": "Пабы и бары",
"image": "http://95.46.99.250:9095/storage/photos/[email protected]"
},
{
"id": 2,
"name": "Кафе",
"image": "http://95.46.99.250:9095/storage/photos/[email protected]"
},
{
"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/[email protected]"
},
{
"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 [email protected]"
}
]
}
回答by Ratul Sharker
Try this
尝试这个
let gitData = try decoder.decode(Root.self, from: data!)
Traverse through your data
遍历您的数据
for singleData in gitData.data where (singleData.name ?? "") == "Cafe" {
print(singleData.image)
}
