我如何初始化我的数组，范围无处不在

Question

我对变量'tb'的声明有点困惑，我希望它的范围在任何地方。这个变量来自JSON。

如果我INIT直接从JSON

var tb = json as! Array<Dictionary<String, Any>> 

它的工作，但它不是作用域到的tableView功能。

我还是一个快捷的初学者，所以如果有人能解释我该怎么办？以及这个范围和变量init/type如何工作，我将非常感激。

下面的代码：

class BiensViewController: UIViewController { 

@IBOutlet weak var maTable: UITableView! 

override func viewDidLoad() { 
    super.viewDidLoad() 
    var user = "" 
    var tb:[Dictionary<String, Any>] 
    super.viewDidLoad() 
    //on récupère l'utilisateur courant. 
    let fm = FileManager.default 
    let urlRepDocuments = try! fm.url(for: .documentDirectory, in: .userDomainMask, appropriateFor: nil, create: true) 
    let url = urlRepDocuments.appendingPathComponent("user.plist") 
    print(url) 
    if let dico = NSMutableDictionary.init(contentsOfFile: url.path){ 
     if dico["email"] != nil { 
      user = dico["email"] as! String 
     } 
    } 
    let parameters = ["email": user] 
    // 
    guard let httpUrl = URL(string: "https://mysite.000webhostapp.com/services")else{return} 
    var request = URLRequest(url: httpUrl) 
    request.httpMethod = "POST" 
    request.addValue("application/json", forHTTPHeaderField: "Content-Type") 
    guard let httpBody = try? JSONSerialization.data(withJSONObject: parameters, options: []) else { return } 
    request.httpBody = httpBody 

    let session = URLSession.shared 
    session.dataTask(with: request) { (data, response, error) in 
     if let response = response { 
      print("******") 
      print(response) 
     } 

     let json:Any 
     if let data = data { 
      do { 
       json = try JSONSerialization.jsonObject(with: data, options: []) 
       //print(json) 
       tb = json as! Array<Dictionary<String, Any>> 
       print(tb) 


      } catch { 
       print(error) 
      } 
     } 

     }.resume() 


    func numberOfSections(in tableView: UITableView) -> Int 
    { 
     return 1 
    } 


    func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int 
    { 
     return tb.count 
    } 
    func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell 
    { 
     //Récupéré une cellule réutilisable 
     let cellule:BiensTableViewCell = tableView.dequeueReusableCell(withIdentifier: "maCellulePersonnalise", for: indexPath) 
      as! BiensTableViewCell 

     //peuple la cellule 
     cellule.etqRef.text = tb[indexPath.row]["ref"] as? String 
     cellule.EtqAdresse.text = tb[indexPath.row]["adresse"] as? String 
     cellule.etqCP.text = tb[indexPath.row]["cp"] as? String 
     cellule.etqVille.text = tb[indexPath.row]["ville"] as? String 
     cellule.etqNomLoc.text = tb[indexPath.row]["nom"] as? String 
     cellule.etqLoyer.text = tb[indexPath.row]["loyer"] as? String 
     return cellule 

}}} 

的错误是：

变量“T”被初始化之前通过封闭拍摄

Answer 1

你只需要申报的viewDidLoad外的变量（）就在绘制插座的地方。目前，您的变量仅限于viewDidLoad（）的范围。但现在它将在全班上课。

class BiensViewController: UIViewController { 

@IBOutlet weak var maTable: UITableView! 
var tb = [Dictionary<String, AnyObject>]() 
//or you can use:- var tb = [Dictionary<String, Any>]() according to your requirement