Question

我想使用APIKit通过iTunes API获取歌曲信息并将其保存到Realm。但是，具有以下代码的“对象”类型是Any，我不知道如何提取元素。这是输出结果。

{
    resultCount = 10;
    results =     (
                {
            artistId = 298496035;
            artistName = "\U30a2\U30f4\U30a3\U30fc\U30c1\U30fc";
            artistViewUrl = "https://itunes.apple.com/jp/artist/avu-ichi/id298496035?uo=4";
            artworkUrl100 = "http://is1.mzstatic.com/image/thumb/Music4/v4/0e/c9/c8/0ec9c862-abdd-8827-9b0d-c30443a88e86/source/100x100bb.jpg";
・・・

请告诉我如何从此输出结果中提取歌曲信息的元素。

import APIKit

protocol iTunesRequest: Request {
}

extension iTunesRequest {
    var baseURL: URL {
        return URL(string: "http://itunes.apple.com")!
    }
}

struct GetSearchRequest: iTunesRequest {
    typealias Response = [Song]    
    var method: HTTPMethod {
    return .get
    }
    let term: String
    init(term: String) {
        self.term = term
    }

    var path: String {
        return "/search"
    }

    var parameters: Any? {
        return [
            "term": term,
            "limit": 10,
            "country": "jp",
            "media": "music",
            "lang": "ja_jp"
        ]
    }

   func response(from object: Any, urlResponse: HTTPURLResponse) throws -> Response {
        var Songs = [Song]()

        print(object)

        if let dictionaries = object as? [NSDictionary] {
            print(dictionaries)
            for dictionary in dictionaries {
                print(dictionary)
                let song = Song()
                song.itunesId = dictionary["trackId"] as! Int
                song.title = dictionary["trackName"] as! String
                song.artwork = dictionary["artworkUrl100"] as! String
                song.artist = dictionary["artistName"] as! String
                song.album = dictionary["collectionName"] as! String
                song.trackSource = dictionary["previewUrl"] as! String
                Songs.append(song)
            }
        }
        return Songs
    }
}

Answer 1

您需要先解析响应JSON。

Realm没有直接支持JSON，但可以使用NSJSONSerialization.JSONObjectWithData(_:options:)的输出从JSON添加对象。生成的符合KVC的对象可用于使用标准API添加/更新对象，以创建和更新对象。

在https://realm.io/docs/swift/latest/#json

了解详情

我想用APIKit从iTunes API获取歌曲信息

1 个答案: