UITableView在tableview.datasource

时间:2017-02-04 02:17:41

标签: ios iphone uitableview swift3 viewcontroller

我在单独的ViewController类中实现了两个UITableview。成功添加第二个UItableView的代码后,我的项目构建但在加载后停止。

它在红线上停止:

tableView.delegate.dataSource = self

错误内容如下:

  

线程1 EXEC_BAD_INSTRUCTION(代码-EXC_i386_INVOP,子代码= 0x0)

AND

  

致命错误:在解包可选值时意外发现nil

由于在第二个视图控制器中添加第二个UItableview之前没有发生这种情况,我想知道我的代码是否相互冲突。我将发布两个视图控制器的副本。我应该改变什么?

顺便说一句:FilmsViewController是应用程序崩溃的地方。虽然它在添加MCViewController Films之前有效:

B:

class FilmsViewController: UIViewController, UITableViewDataSource, UITableViewDelegate {
    weak var tableView : UITableView!
    var FilmArray = [String]()

    let film_url = "https://www.testing.com/api/resources/films/1"
    func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
        return FilmArray.count
    }
    func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {


        let cell = tableView.dequeueReusableCell(withIdentifier: "mycell", for:indexPath) as! FilmsAPITableViewCell
        // Configuring Cell
        cell.movieTitle.text = FilmArray[indexPath.row]
        // Returning the cell
        return cell
    }
    override func viewDidLoad() {
        super.viewDidLoad()

        tableView.dataSource = self
        tableView.delegate = self
        let url:URL = URL(string: film_url)!
        let session = URLSession.shared

        let request = NSMutableURLRequest(url: url)
        request.httpMethod = "GET"
        request.setValue("740c94c51891c02b64d6c78840b478fe0b02fe2c", forHTTPHeaderField: "X-API-KEY")
        request.setValue("Basic YmhlZW0uZW5nckBnbWFpbC5jb206YmgzM20=", forHTTPHeaderField: "Authorization")
        request.cachePolicy = NSURLRequest.CachePolicy.reloadIgnoringCacheData
        let paramString = ""

        request.httpBody = paramString.data(using: String.Encoding.utf8)

        let task = session.dataTask(with: request as URLRequest, completionHandler: {
            (
            data, response, error) in

            guard let _:Data = data, let _:URLResponse = response  , error == nil else {

                return
            }



            var json:Any?

            do
            {
                if let existingData = data {
                    json = try JSONSerialization.jsonObject(with: existingData, options: [])
                }

                //  Prasing JSON
                if let parsedData = json as? [[String:Any]] {
                    for dict in parsedData {
                        if let title = dict["title"] as? String {
                            self.FilmArray.append(title)
                            print(json)
                        }
                    }

                    OperationQueue.main.addOperation({
                        self.tableView.reloadData()
                    })
                }
            }
            catch
            {
                return
            }

            guard let server_response = json as? NSDictionary else
            {
                return
            }

            if let data_block = server_response["data"] as? NSDictionary
            {
                if let session_data = data_block["session"] as? String
                {
                    //  self.login_session = session_data

                    let preferences = UserDefaults.standard
                    preferences.set(session_data, forKey: "session")

                    //  DispatchQueue.main.async(execute: self.LoginDone)
                }
            }
        })

        task.resume()

        // Do any additional setup after loading the view.
    }

    override func didReceiveMemoryWarning() {
        super.didReceiveMemoryWarning()
        // Dispose of any resources that can be recreated.
    }



}

MC:

   class MCViewController: UIViewController, UITableViewDataSource, UITableViewDelegate {

    let message_url = "https://www.testing.com/api/resources/get_film_message/film_id/3825"
    let send_url = "https://www.testing.com/api/resources/send_film_message"
    let film_id = "3825"
    var messageArray = [String]()
    weak var tableView : UITableView!

    func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
        return messageArray.count
    }
    func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {


        let cell = tableView.dequeueReusableCell(withIdentifier: "msgContent", for:indexPath) as! MessageTableViewCell
        // Configuring Cell
        cell.msgContent.text = messageArray[indexPath.row]
        // Returning the cell
        return cell
    }



    @IBOutlet weak var MessageInput: UITextField!
    @IBAction func Sendmsg(_ sender: Any) {
        Sendmsg(username:MessageInput.text!, password: film_id)
    }

    override func viewDidLoad() {
        super.viewDidLoad()

        tableView.dataSource = self
        tableView.delegate = self
        // Do any additional setup after loading the view.
        //let post_data: NSDictionary = NSMutableDictionary()


        //        post_data.setValue(username, forKey: "username")
        //        post_data.setValue(password, forKey: "password")

        let url:URL = URL(string: message_url)!
        let session = URLSession.shared

        let request = NSMutableURLRequest(url: url)
        request.httpMethod = "GET"
        request.setValue("740c94c51891c02b64d6c78840b478fe0b02fe2c", forHTTPHeaderField: "X-API-KEY")
        request.setValue("Basic YmhlZW0uZW5nckBnbWFpbC5jb206YmgzM20=", forHTTPHeaderField: "Authorization")
        request.cachePolicy = NSURLRequest.CachePolicy.reloadIgnoringCacheData
        // Do any additional setup after loading the view.
        var paramString = ""


        //        for (key, value) in post_data
        //        {
        //            paramString = paramString + (key as! String) + "=" + (value as! String) + "&"
        //        }
        //
        request.httpBody = paramString.data(using: String.Encoding.utf8)

        let task = session.dataTask(with: request as URLRequest, completionHandler: {
            (
            data, response, error) in

            guard let _:Data = data, let _:URLResponse = response  , error == nil else {

                return
            }



            let json: Any?

            do
            {
                json = try JSONSerialization.jsonObject(with: data!, options: [])
                if let parsedData = json as? [[String:Any]] {
                    for dict in parsedData {
                        if let title = dict["message"] as? String {
                            self.messageArray.append(title)
                            print(json)
                        }
                    }
                }
            }
            catch
            {
                return
            }

            guard let server_response = json as? NSDictionary else
            {
                return
            }


            if let data_block = server_response["data"] as? NSDictionary
            {
                if let session_data = data_block["session"] as? String
                {
                    //  self.login_session = session_data

                    let preferences = UserDefaults.standard
                    preferences.set(session_data, forKey: "session")

                    //  DispatchQueue.main.async(execute: self.LoginDone)
                }
            }



        })

        task.resume()
    }

    override func didReceiveMemoryWarning() {
        super.didReceiveMemoryWarning()
        // Dispose of any resources that can be recreated.
    }

    func Sendmsg(username:String, password:String)
    {
        let post_data: NSDictionary = NSMutableDictionary()


        post_data.setValue(username, forKey: "message")
        post_data.setValue(password, forKey: "film_id")

        let url:URL = URL(string: send_url)!
        let session = URLSession.shared

        let request = NSMutableURLRequest(url: url)
        request.httpMethod = "POST"
        request.setValue("740c94c51891c02b64d6c78840b478fe0b02fe2c", forHTTPHeaderField: "X-API-KEY")
        request.setValue("Basic YmhlZW0uZW5nckBnbWFpbC5jb206YmgzM20=", forHTTPHeaderField: "Authorization")
        request.cachePolicy = NSURLRequest.CachePolicy.reloadIgnoringCacheData

        var paramString = ""


        for (key, value) in post_data
        {
            paramString = paramString + (key as! String) + "=" + (value as! String) + "&"
        }

        request.httpBody = paramString.data(using: String.Encoding.utf8)

        let task = session.dataTask(with: request as URLRequest, completionHandler: {
            (
            data, response, error) in

            guard let _:Data = data, let _:URLResponse = response  , error == nil else {

                return
            }



            let json: Any?

            do
            {
                json = try JSONSerialization.jsonObject(with: data!, options: [])
                print(json)
            }
            catch
            {
                return
            }

            guard let server_response = json as? NSDictionary else
            {
                return
            }


//            if let data_block = server_response["data"] as? NSDictionary
//            {
//                if let session_data = data_block["session"] as? String
//                {
//                    self.login_session = session_data
//                    
//                    let preferences = UserDefaults.standard
//                    preferences.set(session_data, forKey: "session")
//                    
//                    DispatchQueue.main.async(execute: self.LoginDone)
//                }
//            }
//            


        })

        task.resume()


    }


    /*
     // MARK: - Navigation

     // In a storyboard-based application, you will often want to do a little preparation before navigation
     override func prepare(for segue: UIStoryboardSegue, sender: Any?) {
     // Get the new view controller using segue.destinationViewController.
     // Pass the selected object to the new view controller.
     }
     */

}

1 个答案:

答案 0 :(得分:0)

您在哪里初始化tableView?好像它可能是nil ....

tableView = UITableView(frame: frame)

如果你使用的是storyboard / xib,你也可以将tableView作为IBOutlet挂钩。