Swift 请求数据与表格

1.创建一个类NSurlSevice

创建一个方法

func getNew(channel:String,starNum:Int,complation:@escaping (Any,Bool) -> Void) -> Void {

        //网址

        var strUrl = "http://api.jisuapi.com/news/get?channel=\(channel)&start=\(starNum)&num=10&appkey=de394933e1a3e2db"

        //转码

        strUrl = strUrl.addingPercentEncoding(withAllowedCharacters: CharacterSet.urlFragmentAllowed)!

        //转化为url类型

        let url = URL(string: strUrl)

        //把url封装成nsurlquest

        let request = URLRequest(url: url!, cachePolicy: .reloadIgnoringCacheData, timeoutInterval: 15.0)

        //用URLsession请求网络数据

        let task:URLSessionDataTask = URLSession.shared.dataTask(with: request) { (data, resposen, error) in

            //错误判断

            if error != nil{

                complation("网络服务器错误", false)

                return

            }

            //解析

            let  jsonData = try? JSONSerialization.jsonObject(with: data!, options: JSONSerialization.ReadingOptions.allowFragments)

            if jsonData == nil{

                complation("网络解析错误", false)

                return

            }

            //解析成功

            let status = (jsonData as! NSDictionary).value(forKey: "status") as! String

            let msg = (jsonData as! NSDictionary).value(forKey: "msg") as! String

            if Int(status) != 0 {

                complation(msg, false)

                return

            }

            let result = (jsonData as! NSDictionary).value(forKey: "result") as! NSDictionary

            let list = result.value(forKey: "list") as! NSArray

            var newarr:[News] = []

            for item in list{

                let dic = item as! NSDictionary

                let oneNew = News()

                oneNew.title =  dic.value(forKey: "title") as! String

                oneNew.content = dic.value(forKey: "content") as! String

                oneNew.time = dic.value(forKey: "time") as! String

                print("解析1:\(oneNew.title)")

                print("解析2:\(oneNew.content)")

                print("解析3:\(oneNew.time)")

                newarr.append(oneNew)

            }

            complation(newarr, true)

        }

      task.resume()

    }

图一

2.创建一个继承与UITableViewCell

var img: UIImageView?

    var Zlable:UILabel?

    var Flabel:UILabel?

    var Time:UILabel?

    func showint() -> Void {

        img = UIImageView(frame: CGRect(x: 5, y: 5, width: 90, height: 90))

        img?.backgroundColor = .red

        self.contentView.addSubview(img!)

        Zlable = UILabel(frame: CGRect(x: 110, y: 20, width: 170, height: 40))

        Zlable?.font = UIFont(name: "ni", size: 29)

        Zlable?.backgroundColor = UIColor.blue

        contentView.addSubview(Zlable!)

        Flabel = UILabel(frame: CGRect(x: 110, y: 65, width: 70, height: 30))

        Flabel?.backgroundColor = UIColor.orange

        contentView.addSubview(Flabel!)

        Time = UILabel(frame: CGRect(x: 280, y: 30, width: 80, height: 20))

        Time?.backgroundColor = UIColor.yellow

        contentView.addSubview(Time!)

    }

    override init(style: UITableViewCellStyle, reuseIdentifier: String?) {

        super.init(style: UITableViewCellStyle.default, reuseIdentifier: reuseIdentifier)

        self.showint()

    }

    required init?(coder aDecoder: NSCoder) {

        fatalError("init(coder:) has not been implemented")

    }

cell

3.在viewcontroller中调用

图3

图3中的方法在viewWillAppear中调用

4.在tableview中注册注册cell

        TableView.register(TableViewCell.classForCoder(), forCellReuseIdentifier: "xuwen")