从使用 SwiftyJSON 的函数返回填充的数组

Question

我有一个功能可以使用 SwiftyJSON 从 Web 服务中获取信息。当我使用我的 DataManager class 调用该服务时，我能够成功填充我的数组，当我打印它时，它给了我我想要的。但是，我不能 return 从我的函数中填充数组，因为我认为它在函数结束时超出了范围。谁能告诉我如何使我的函数 return 成为我填充的数组而不超出范围？如果我做错了什么，将不胜感激。

func getEarthquakeInfo()->NSArray {
        var info = [AppModel]()

        DataManager.getEarthquakeDataFromFileWithSuccess {
            (data) -> Void in

                let json = JSON(data: data)


                if let JsonArray =  json.array {

                    for appDict in JsonArray {
                        var ids: String? = appDict["id"].stringValue
                        var title: String? = appDict["title"].stringValue
                        var time: String? = appDict["time"].stringValue
                        var information = AppModel(idEarth: ids, title: title, time: time)

                        info.append(information)
                    }


                }


           println("\(info)") // will print the results that I need


        }



        return info // This is an empty array
    }

这是我在打印应用程序时得到的示例： ID：146052，标题：M 1.7 爆炸 - 华盛顿花岗岩瀑布 0km E，时间：2015-04-13 21:29:40 UTC， DataManager4.swift 文件：

    let earthquakeURL = "http://www.kuakes.com/json/"
class DataManager {
    class func getEarthquakeDataFromFileWithSuccess(success: ((websiteData: NSData) -> Void)) {
        //1
        loadDataFromURL(NSURL(string: earthquakeURL)!, completion:{(data, error) -> Void in
            //2
            if let urlData = data {
                //3
                success(websiteData: urlData)
            }
        })
 }


    class func loadDataFromURL(url: NSURL, completion:(data: NSData?, error: NSError?) -> Void) {
        var session = NSURLSession.sharedSession()

        // Use NSURLSession to get data from an NSURL
        let loadDataTask = session.dataTaskWithURL(url, completionHandler: { (data: NSData!, response: NSURLResponse!, error: NSError!) -> Void in
            if let responseError = error {
                completion(data: nil, error: responseError)
            } else if let httpResponse = response as? NSHTTPURLResponse {
                if httpResponse.statusCode != 200 {
                    var statusError = NSError(domain:"com.kuakes", code:httpResponse.statusCode, userInfo:[NSLocalizedDescriptionKey : "HTTP status code has unexpected value."])
                    completion(data: nil, error: statusError)
                } else {
                    completion(data: data, error: nil)
                }
            }
        })

        loadDataTask.resume()
    }


}

Answer 1

我是这样解决的：

var info = [AppModel]()



    func getEarthquakeInfo(completion: (results : NSArray?) ->Void ){

        DataManager.getEarthquakeDataFromFileWithSuccess {
            (data) -> Void in

                let json = JSON(data: data)


                if let JsonArray =  json.array {

                    for appDict in JsonArray {
                        var ids: String? = appDict["id"].stringValue
                        var title: String? = appDict["title"].stringValue
                        var time: String? = appDict["time"].stringValue
                        var information = AppModel(idEarth: ids, title: title, time: time)

                        self.info.append(information)
                        completion(results: self.info)
                    }


            }

        }



    }

从使用 SwiftyJSON 的函数返回填充的数组

Returning a populated array from a function that uses SwiftyJSON

function

nsarray

swift

swifty-json