使用 Alamofire 搜索从 swift 2 转换为 swift 3 时出错

Posted 2023-02-24

【中文标题】使用 Alamofire 搜索从 swift 2 转换为 swift 3 时出错

【英文标题】：Error converting from swift 2 to swift 3 with searching using Alamofire

【发布时间】：2016-11-26 21:39:10

【问题描述】：

func getLastVideos()

   Alamofire.request(url: urlString, method: .GET, parameters: ["part":"snippet","maxResults":"30","key":API_KEY, "playlistId": playlist_Id], encoding: URLEncoding.default, headers: nil).responseJSON  (response) in



        if let jsonResult = response.result.value

            var videosArray = [LastVideos]()

            for video in jsonResult["items"] as! NSArray

                let lastVideo = LastVideos()

                lastVideo.title = video.valueForKeyPath("snippet.title") as! String
                lastVideo._description = video.valueForKeyPath("snippet.description") as! String
                lastVideo.id = video.valueForKeyPath("snippet.resourceId.videoId") as! String

                if video.valueForKeyPath("snippet.thumbnails.maxres.url") != nil 
                    lastVideo.thumbnailUrl = video.valueForKeyPath("snippet.thumbnails.maxres.url") as! String
                else if video.valueForKeyPath("snippet.thumbnails.standard.url") != nil 
                    lastVideo.thumbnailUrl = video.valueForKeyPath("snippet.thumbnails.standard.url") as! String
                else if video.valueForKeyPath("snippet.thumbnails.high.url") != nil 
                    lastVideo.thumbnailUrl = video.valueForKeyPath("snippet.thumbnails.high.url") as! String
                else if video.valueForKeyPath("snippet.thumbnails.medium.url") != nil 
                    lastVideo.thumbnailUrl = video.valueForKeyPath("snippet.thumbnails.medium.url") as! String
                else
                    lastVideo.thumbnailUrl = video.valueForKeyPath("snippet.thumbnails.default.url") as! String
                

                videosArray.append(lastVideo)

            

            self.lastVideos = videosArray


            if self.delegate != nil 
                self.delegate.lastVideosAreReady()

            





        
    

我似乎无法让这段代码与 swift 3 和 alamofire 4.0 一起使用。 我不断收到extra argument in call 的错误。一旦我修复了这个错误，我就会得到错误：type any has no subscript members in the if let statement.

非常感谢任何帮助。

【问题讨论】：

您能解决问题吗？

不，我没有，它没用

检查我更新的答案。

【参考方案1】：

喜欢下面的？

let url = "www.mywebsite.net/api/"
let params = ["part":"snippet", "maxResults":"30", "key":API_KEY, "playlistId": playlist_Id]
Alamofire.request(.GET, url, parameters: params).responseJSON  (responseObject) -> Void in
    guard let object = response.result.value else 
        return
    
    let json = JSON(object) // with SwiftyJSON

【参考方案2】：

试试：

if let jsonResult = response.result.value as? [String:AnyObject]

在 Alamofire Closure 中使用这行代码：

switch response.result 
case .Success(let JSON):
    print("Success with JSON: \(JSON)")
    //rest of code

case .Failure(let error):
    print("Error with Description: \(error.localizedDescription)")

【参考方案3】：

对于 swift 3，使用以下代码。它在我所有的项目中都非常有效..

//参数

let paramDic : NSMutableDictionary = [
            "key1" : "value1",
            "key2" : "value2",
        ]

let urlString = "www.mywebsite.net/api/"
let url : URL = URL.init(string: urlString)!
var request = URLRequest(url: url)
request.httpMethod = "GET"

//Setting header

request.setValue("application/json; charset=utf-8", forHTTPHeaderField: "Content-Type")
request.setValue("application/json", forHTTPHeaderField: "Accept")

//Setting parameters

request.httpBody = try! JSONSerialization.data(withJSONObject: paramDic!, options: [])



if paramDic != nil 
            request.httpBody = try! JSONSerialization.data(withJSONObject: paramDic!, options: [])
        

alamoFireManager!.request(request as URLRequestConvertible).responseJSON 
            response in
            switch response.result 
            case .failure(let error):
                print("\(urlString) failure response -> \n NSHTTPURLResponse ->\(response.response) \n \(error)")
            case .success :
                print("\(urlString) success response -> \n NSHTTPURLResponse ->\(response.response) \n Data -> \(response.result.value as? NSDictionary)")