ios - 新 Alamofire Swift 3 上的 GET 请求

Question

因此，我决定将我的应用程序迁移到 Swift 3.0，但现在我发现自己无法解决使用新 Alamofire 的 .GET 请求所面临的问题。这是现在的请求:

func getAlbums(_ ID: String, ANN: String, completed: @escaping DownloadComplete) {
        let searchFT = ID.replacingOccurrences(of: " ", with: "+", options: NSString.CompareOptions.literal, range: nil)
        let urlPath = ""
        let url = URL(string: urlPath)

        Alamofire.request(url!, method: .get).responseJSON { response in
            if let JSON = response.result.value as! [String: AnyObject]! {
                if let dict = JSON["results"] as! NSArray! {
                    AlbumsArtist.removeAll()
                    AlbumsArtist = [String]()
                    ImagesArtist.removeAll()
                    ImagesArtist = [String]()
                    for items in dict {


                        if let AT = items["artistName"] as? String {
                            if AT == ANN {
                                if let TN = items["collectionName"] as? String {
                                    AlbumsArtist.append(TN)
                                } else {
                                    AlbumsArtist.append("")
                                }

                                if let IM = items["artworkUrl100"] as? String {
                                    let newString = IM.stringByReplacingOccurrencesOfString("100", withString: "600", options: NSStringCompareOptions.LiteralSearch, range: nil)
                                    ImagesArtist.append(newString)
                                } else {
                                    ImagesArtist.append("")
                                }
                            }
                        }




                    }

                    completed()

                }

            }

            }
        }

我遇到的问题是 if let AT = items["artistName"] as? String 错误是这样的: Type 'NSFastEnumerationIterator.Element (aka: 'Any') has no subscript Members

非常感谢!

Answer 1

正如评论中提到的，您应该将代码更改为:

if let AT = items["artistName"] as? [[String:Any]]

但是为了使您的代码更安全，您应该使用以下内容:

if let AT = items["artistName"] as? [[String:Any]] {
    if AT == ANN {
        guard let TN = items["collectionName"] as? String,
              let IM = items["artworkUrl100"] as? String else { // Some error occurred }

        AlbumsArtist.append(TN);
        let newString = IM.stringByReplacingOccurrencesOfString("100", withString: "600", options: NSStringCompareOptions.LiteralSearch, range: nil)
        ImagesArtist.append(newString)
    }
}