我需要从网址获取数据。
例如,使用邮递员,如果我尝试使用我的私有url = "http://127.0.0.1/MyWebService/api/fetch_image.php"
进行get请求并添加params:
id_key-> id_team
值-> 2
该软件将其返回给我:
{“ image_team”:[{“ id”:1,“ img_path”:“ http://localhost/MyWebService/images/Schermata.png”,“ id_team”:2},{“ id”:2, “ img_path”:“ http://localhost/MyWebService/images/Schermata.png”,“ id_team”:2},{“ id”:3,“ img_path”:“ http:// localhost / MyWebService / images / Schermata .png“,” id_team“:2}]}
现在在Swift中,我已经编写了这些类:
class ClassJsonTeam: Codable {
private var teams: [JsonTeam]
init(teams: [JsonTeam]) {
self.teams = teams
}
func getTeams()-> [JsonTeam]{
return(self.teams);
}
func setTeams(teams:[JsonTeam]){
self.teams = teams;
}
}
class JsonTeam: Codable {
private let id: Int
private var name: String
private var member: Int
init(id: Int, name: String, member: Int) {
self.id = id
self.name = name
self.member = member
}
func getId()->Int{
return(self.id);
}
func setId(id:Int){
self.member = id;
}
func getName()->String{
return(self.name);
}
func setName(name:String){
self.name = name;
}
func getMembers()->Int{
return(self.member);
}
func setMembers(members:Int){
self.member = members;
}
}
问题是:如何提出请求并将日期保存在班级中?
(我正在使用Swift 4)
答案 0 :(得分:3)
对不起,但这是可怕的 objective-c-ish 代码。
您显然希望在类中使用常量,因此声明常量,并且在几乎所有情况下,您根本不需要类
struct Response: Decodable {
let teams: [Team]
private enum CodingKeys : String, CodingKey { case teams = "image_team" }
}
struct Team: Decodable {
let id: Int
let imagePath: URL
let teamID: Int
private enum CodingKeys : String, CodingKey { case id, imagePath = "img_path", teamID = "id_team" }
}
就是这样。没有其他的。没有奇怪的公共获取者和私人安装者。处理(De)codable
时没有初始化程序。而且,如果您使用 swiftier 键,则可以完全省略CodingKeys
声明。密钥imagePath
甚至可以解码为URL
。
最后:没有结尾的分号!
要读取数据,请使用传统的URLSession
let url = URL(string: "http://127.0.0.1/MyWebService/api/fetch_image.php")!
let dataTask = URLSession.shared.dataTask(with: url) { data, response, error in
if let error = error {
print(error)
return
}
do {
let result = try JSONDecoder().decode(Response.self, from: data!)
print(result)
} catch {
print(error)
}
}
dataTask.resume()
要添加参数,您必须在URL后面附加一个query
http://127.0.0.1/MyWebService/api/fetch_image.php?id_team=2
但这取决于您的后端。