json - 快速解析JSON文件

Question

我试图在 tableView 中显示从 json 文件收集的数据，如下所示:https://api.tfl.gov.uk/journey/journeyresults/1000266/to/1000013

我只想显示每个旅程的摘要和描述。我试过类似的东西:

               do{
let fetchedData = try JSONSerialization.jsonObject(with: data!, options: .mutableLeaves) as! NSDictionary
                print(fetchedData.value(forKey: "journey"))

                if let journeyArray = fetchedData.value(forKey: "journey") as? NSArray{
                    for journey in journeyArray{
                        if let journeyDict = journey as? NSDictionary {
                            if let summary = journeyDict.value(forKey: "summary"){
                                self.summaryArray.append(summary as! String)
                            }
                            if let desc = journeyDict.value(forKey: "description"){
                                self.descArray.append(desc as! String)
                            }

                            OperationQueue.main.addOperation {
                                self.journeysTableView.reloadData()
                            }

                        }
                    }
                }
                self.journeysTableView.reloadData()
            }

和

 do{
                let fetchedData = try JSONSerialization.jsonObject(with: data!, options: .mutableLeaves) as! Dictionary<String,AnyObject>
                print(fetchedData)

                for eachFetchedJourney in fetchedData{
                    let eachJourney = eachFetchedJourney as! [String: Any]
                    let summary = eachJourney["summary"] as! String
                    let description = eachJourney["description"] as! String

                    self.fetchedJourneys.append(Journey(summary: summary, description: description))
                    print(fetchedData)
                }
                self.journeysTableView.reloadData()
            }
            catch{
                print("Error")
            }

但我仍然无法正确解析。有人能帮我吗？

Answer 1

首先请在 JSON 查看器中检查您的响应 Here

然后检查您的字典，您直接使用数组“journeyArray”中的键“summary”，您可以在“legs”数组 -> “instruction”字典中找到“summary”键。

所以照此去做。

最好的方法是使用 https://github.com/tristanhimmelman/AlamofireObjectMapper它会自动将 JSON 转换为您的响应数据。