如何设置 success/failure 块以便我可以使用 Swift 将字符串传递到其中？

Question

我有一个 API 方法，可以 return 为特定联赛设置球队。我需要做的就是传入一些参数。

例如，API URL 看起来像这样：http://api.website.com/api/teams?season=last&league=0Xc334xUK4

这是我的代码：

@objc class APITeam: NSObject {

    var leagueObjectID: NSString!

    let baseUrl = "http://api.website.com/api"

    static let sharedInstance = APITeam()

    static let getTeamsEndpoint = "/teams"

    static let params = "?season=last&league="

    private override init() {}

    func getTeams (_ onSuccess: @escaping(Any) -> Void, onFailure: @escaping(Error) -> Void) {

        var request = URLRequest(url: URL(string: baseUrl + APITeam.getTeamsEndpoint + APITeam.params)!)

        let session = URLSession.shared

        request.httpMethod = "GET"

        let task = session.dataTask(with: request) { (data : Data?, response : URLResponse?, error : Error?) in

            if(error != nil){
                onFailure(error!)
            } else{

                do {

                    let result  = try JSONSerialization.jsonObject(with: data!)
                    onSuccess(result)

                } catch {

                    print(error)

                }

            }

        }
        task.resume()

    }

}

为了让这个API方法能够return数据，我需要在发出请求时传入我想要球队的联赛的objectID。

我尝试将参数添加到：

func getTeams (_ onSuccess: @escaping(Any) -> Void, onFailure: @escaping(Error) -> Void, leagueObjectID: String) {

 var request = URLRequest(url: URL(string: baseUrl + APITeam.getTeamsEndpoint + APITeam.params + leagueObjectID)!)

这没有按预期工作。当我在另一个 class 中使用该方法时，"leagueObjectID" 作为成功的附加部分，如果有意义的话，错误块。我需要能够将 leagueObjectID 传递到方法中，以便在 URL 请求的末尾使用它。

这就是我在 objective-c class 中称呼 API 团队的方式：

[[APITeam sharedInstance] getTeams:^(id result) {

} onFailure:^(NSError * error) {

}];

如您所见，我添加到 getTeams 函数的额外参数没有显示，当我尝试手动添加时出现错误。

你会如何处理？一个例子将不胜感激。

感谢您的宝贵时间

Answer 1

static 可能无法像您在其他语言中习惯的那样工作。 static var 表现得像 class var.

如果我没理解错的话，这会满足你的需求

@objc class APITeam: NSObject {
    private static let baseUrl = "http://api.website.com/api"

    private static let getTeamsEndpoint = "/teams"

    let params = "?season=last&league="

    private override init() {}

    func getTeam(id: String, _ onSuccess: @escaping(Any) -> Void, onFailure: @escaping(Error) -> Void) {
        var request = URLRequest(url: URL(string: APITeam.baseUrl + APITeam.getTeamsEndpoint + APITeam.params + id)!)
        request.httpMethod = "GET"

        URLSession.shared.dataTask(with: request) { (data: Data?, response: URLResponse?, error: Error?) in
            if let error = error {
                onFailure(error)
            } else if let responseData = data {
                do {
                    let result = try JSONSerialization.jsonObject(with: responseData)
                    onSuccess(result)
                } catch {
                    print(error)

                }

            }

        }.resume()

    }

}

用法： APITeam().getTeam(id: "0Xc334xUK4", ..your completion handlers here..)

Answer 2

改为

func getTeams (leagueObjectID: String, onSuccess: @escaping(Any) -> Void, onFailure: @escaping(Error) -> Void)

Answer 3

这对我有用：

@objc class APITeam: NSObject {

    var leagueObjectID: NSString!

    let baseUrl = "http://api.website.com/api"

    static let sharedInstance = APITeam()

    static let getTeamsEndpoint = "/teams"

    static let params = "?season=last&league="

    private override init() {}

    func getTeams (leagueObjectID: String, _ onSuccess: @escaping(Any) -> Void, onFailure: @escaping(Error) -> Void) {

        var request = URLRequest(url: URL(string: baseUrl + APITeam.getTeamsEndpoint + APITeam.params + leagueObjectID)!)

        let session = URLSession.shared

        request.httpMethod = "GET"

        let task = session.dataTask(with: request) { (data : Data?, response : URLResponse?, error : Error?) in

            if(error != nil){
                onFailure(error!)
            } else{

                do {

                    let result  = try JSONSerialization.jsonObject(with: data!)
                    onSuccess(result)

                } catch {

                    print(error)

                }

            }

        }
        task.resume()

    }

}

然后在我的Objective-Cclass:

[[APITeam sharedInstance] getTeamsWithLeagueObjectID:@"93PwHe5e4S" :^(id league) {
    NSLog(@"THE LEAGUE: %@", league);
} onFailure:^(NSError * error) {

}];

在尝试访问原始 class 之前构建应用程序也很重要。这对我来说是至关重要的一步。有时我不需要这样做，但是这一次，在构建应用程序之前我无法访问新更改的 APITeam getTeams 函数。

如何设置 success/failure 块以便我可以使用 Swift 将字符串传递到其中？

How do I set up a success/failure block so that I can pass a string into it using Swift?

nsurlrequest

ios

swift