ios - 从 api 检索大量数据并在 UICollectionView Swift 中使用它

Question

您好，我正在开发一个可检索电影数据的应用程序，但我遇到了一些问题，这是我的代码:

let categories = [MovieCategory(generID: "28", categoryTitle: "Action")
    ,MovieCategory(generID: "16", categoryTitle: "Animation")
    ,MovieCategory(generID: "35", categoryTitle: "Comedy"),
     MovieCategory(generID: "18", categoryTitle: "Drama"),
     MovieCategory(generID: "27", categoryTitle: "Horror"),
     MovieCategory(generID: "10752", categoryTitle: "War")]

func parseJson( category: MovieCategory)
{

    self.collectionView.reloadData()
    var currentCategory = category
    let parameters = ["api_key":"8460d476d21be7e26a99234d8ca8de51","sort_by":"false","include_video":"false","with_genres":category.generID]

    Alamofire.request(url, method: .get, parameters: parameters).responseJSON { (response) in
        if response.result.isSuccess{
            let movieJSON = JSON(response.result.value!)

for i in 0..<20{
        let title = movieJSON["results"][i]["title"].stringValue
        let posterPath = movieJSON["results"][i]["poster_path"].stringValue

        let overview = movieJSON["results"][i]["overview"].stringValue
        let dateReleased = movieJSON["results"][i]["release_date"].stringValue
        let voteAverage = movieJSON["results"][i]["vote_average"].stringValue
        if let safeImage = self.createImage(posterPath: posterPath)
        {
        let movieDetails = MovieDetails(movieTitle: title, poster: safeImage, voteAverage: voteAverage, overview: overview, releaseDate: dateReleased)
        currentCategory.categoryMovies.append(movieDetails)
        self.actionMovies.append(UIImage(named: "gul")!)
        self.collectionView.reloadData()
        }

            }

                                   }

        }
}

我使用两个结构作为数据源，它们是:

struct MovieCategory {
let generID:String
let categoryTitle:String
var categoryMovies:[MovieDetails] = []

}和:

struct MovieDetails{
let movieTitle:String
let poster:UIImage
let voteAverage:String
let overview:String
let releaseDate:String

}但是当我想获取categoryMovies中的数据时，无论我如何在parseJson函数中向其附加数据，结果都是空的，我不知道为什么当调用numberOfItemsInSection方法时它返回类别[section]时它是空的。 categoryMovies.count 并且它没有调用 cellForItemAtIndexpath 方法，这让我认为它是空的。如果您知道解决方案，我非常感谢您的帮助。

谢谢

Answer 1

我发现解决方案只需将结构定义为类，因为它们通过引用传递值，它解决了我的问题