JSON 下载但没有添加到 UITable，但没有错误？

Question

我有一个 API 可以加载到我的应用中:

https://wger.de/api/v2/exercise/?language=2

API 调用没有错误，运行获取数据函数的 TableView 也没有错误。到现在为止，它以前一直运行良好。我没有更改任何代码。

我以为服务器会因通话而停机，但正如您所见，它们并非如此。

我正在运行打印“请求成功”，它在运行时显示在调试中，因此它获取数据，但是打印(self.exercises)返回一个空数组因此没有表数据......有什么想法吗？这是 API 调用

open class ApiService: NSObject {

    open func getData(completionHandler: @escaping (NSDictionary?, NSError?) -> Void) -> Self {

        //loads api filtering by english only
        let requestUrl = "https://wger.de/api/v2/exercise/?format=json&language=2"

        Alamofire.request(requestUrl, method: .get, encoding: URLEncoding.default)
            .responseJSON { response in
                switch response.result {
                case .success( let data):
                    print("Request was sucessful")
                    completionHandler(data as? NSDictionary, nil)

                case .failure(let error):
                    print("Request failed with error: \(error)")
                    completionHandler(nil, error as NSError?)
                }
        }
        return self
    }

表函数

        func getApiData() {

    let _ = apiService.getData() {
        (data, error) in
        if let data = data {
            if let results = data["results"] as? [[String:Any]] {
                for result in results {
                    if let exercise = Exercise(dictionary: result) {
                        self.exercises.append(exercise)
                    }
                }
                self.exercisesTableView.reloadData()
                print(self.exercises)
            }
        }
    }
}

我也在使用序列化模型，如果这会干扰？

final public class Exercise {
var id: Int
var descrip: String
var name: String
var language: [Int]
var muscles: [Int]
var musclesSecondary: [Int]
var equipment: [Int]

public init?(dictionary: [String: Any]) {

    guard
        let id = dictionary["id"] as? Int,
        let descrip = dictionary["description"] as? String,
        let name = dictionary["name"] as? String,
        let language = dictionary["language"] as? [Int],
        let muscles = dictionary["muscles"] as? [Int],
        let musclesSecondary = dictionary["muscles_secondary"] as? [Int],
        let equipment = dictionary["equipment"] as? [Int]
    else { return nil }

    self.id = id
    self.descrip = descrip
    self.name = name
    self.language = language
    self.muscles = muscles
    self.musclesSecondary = musclesSecondary
    self.equipment = equipment
}

Answer 1

对不起，

I havent changed any code

错了。

您添加了属性 musclesSecondary 和 language 并且确实存在错误:language is single Int rather而不是一个数组。

var language: Int
...
let language = dictionary["language"] as? Int,