Question

所以我从服务器收到了一些json数据，现在我试图将它保存为一个数组，这样我就可以用它来填充tableview但是我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，您必须在请求范围之外声明ary。然后，您必须将数据存储在同一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()

尝试以上代码。希望它对你有用。

如何使用swift 3将已解析的json数据保存到数组中

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