如何将解析的json数据保存到一个数组与swift 3

Question

因此，我收到一些服务器的JSON数据，现在我试图将它保存为一个数组，所以我可以用它填充一个tableview，但在这里遇到麻烦是我的代码：

class UserInfo : UIViewController{ 
var main = "" 
session.dataTask(with: url) { (data, response, error) in 
     if let response = response { 
      print (response) 
     } 
     if let data = data { 
      let json = (try? JSONSerialization.jsonObject(with: data, options: [])) 
      print(json) 
      guard let array = json as? [Any] else {return} 
      for info in array { 
      guard let infoDict = info as? [String : Any] else{return} 
      //there is a declared var called main 
      //main is the one i want save as an array, currently its a variable. i tried to save it as an array by using as! Array but i get error 
      self.main = infoDict["Title"] as! String 
      print (self.main) 
} 
} 
}.resume() 
} 

Answer 1

首先你必须声明ary以外的请求范围。然后，您必须将数据存储在相同的ary中。

var ary: NSMutableArray = NSMutableArray() 

session.dataTask(with: url) { (data, response, error) in 
      if let response = response { 
       print (response) 
      } 
      if let data = data { 
       let json = (try? JSONSerialization.jsonObject(with: data, options: [])) 
       print(json) 
       guard let array = json as? [Any] else {return} 
       for info in array { 
        guard let infoDict = info as? [String : Any] else{return} 
        //there is a declared var called main 
        //main is the one i want save as an array, currently its a variable. i tried to save it as an array by using as! Array but i get error 
        self.main = infoDict["Title"] as! String 
        self.ary.add(self.main) 
        print (self.main) 
       } 
       print("Final array is :::",self.ary) 
      } 
      }.resume() 

试试上面的代码。希望它能为你工作。