Question

我正在从文件中读取一个字符串并将其转换为Dictionary但我无法将其加载到tableview中：这是我的代码：

 override func viewDidLoad() {




        let DocumentDirURL = try! FileManager.default.url(for: .documentDirectory, in: .userDomainMask, appropriateFor: nil, create: true)

        let fileURL = DocumentDirURL.appendingPathComponent("x").appendingPathExtension("json")
         filePath = Bundle.main.path(forResource: "x", ofType: "json")


        do {

          let  readString = try String(contentsOf: fileURL)
            let x = readString.components(separatedBy: "\n")
              do{

                            }catch{
                                 print (" error nil  ")
                                }

            for i in 1..<x.count{
                do{
                let y = x[i]


                var b = convertToDictionary(text: y)


                    let date = try b?["date"]
                    dictarr["date"] = "\(date)"
                     print (" midas \(dictarr["date"])  ")

                    let response = try b?["response"]!
                    dictarr["response"] = "\(response)"
//                    print (" midas \(dictarr["response"])  ")

                    let message = try b?["message"]
                    dictarr["message"] = "\(message)"
//                    print (" midas \(dictarr["message"])  ")

                    clinetarr.add(dictarr)

            }catch{
                print (" error nil  ")
            }
            }







        } catch let error as NSError {
            print("Failed reading from URL: \(fileURL), Error: " + error.localizedDescription)
        }
    }



    func convertToDictionary(text: String) -> [String: Any]? {
        if let data = text.data(using: .utf8) {
            do {
                return try JSONSerialization.jsonObject(with: data, options: []) as? [String: Any]
            } catch {
                print ("nil found")
                //print(error.localizedDescription)
            }
        }
        return nil
    }

这是我的表格视图

override func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
//        let cell = tableView.dequeueReusableCell(withIdentifier: "cell", for: indexPath)

        let cell = tableView.dequeueReusableCell(withIdentifier: "cell", for: indexPath)
        let datainrow = clinetarr[indexPath.row]
 cell.textLabel?.text = "\((datainrow as AnyObject).object("message")!)"

   cell.textLabel?.text=itemListTmp[keysItem[indexPath.section]]?.removeFirst()
        // Configure the cell...

        return cell
    }

在这一行中，cell.textLabel？.text =“（（datainrow as AnyObject）.object（”message“）！）”它给了我错误：非函数类型的调用值'任何'我的主要目标是在一个单元格内的一行中显示：dictarr [“date”]，dictarr [“response”]和dictarr [“message”]。

Answer 1

您从字典中读取的方式不正确，您应该将每个值转换为正确的类型。我不知道你的价值是什么类型，但如果我们假设它们都是String类型我会做这样的事情

var output: String = ""

if let date = dictarr["date"] as? String {
    output = "\(date) "  //using space as separator
}

if let response dictarr["response"] as? String { 
    output.append(response)
    output.append(" ")
}

if let message dictarr["message"] as? String { 
    output.append(message)
}

cell.textLabel?.text = output

Answer 2

非常感谢@Joakim Danielson

我几小时前就设法解决了这个问题我就是这样做的：

 for i in 1..<x.count{
                do{
                    if x != nil {

                let y = x[i]

                    let  b =  convertToDictionary(text: y)


                        if let date = try b?["date"]{
                            dictarr["date"] = "\(date)"
                        }
                        if  let response = try b?["response"]{
                            dictarr["response"] = "\(response)"
                        }

                        if let message = try b?["message"]{
                            dictarr["message"] = "\(message)"
                        }
                    clinetarr.append(dictarr)
                    }
            }catch{
                print (" error nil  ")
                }
            }

这是tableview：

    override func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {


            let cell = tableView.dequeueReusableCell(withIdentifier: "cell", for: indexPath)

            let client = clinetarr[indexPath.row]
            cell.detailTextLabel!.numberOfLines = 0
            cell.textLabel?.text = client["response"] as! String
            cell.detailTextLabel?.text = "\(client["message"] as! String) \n \( client["date"] as! String)"


return cell
    }

将Dictionary加载到表视图中

2 个答案: