1⃣写一个简单的tableview模版，显示数组里的数据

var ObjectArray = [String]()
    var i = 0
    
    override func viewDidLoad() {
        super.viewDidLoad()

for i = 0 ; i<10 ; i++ {
            self.ObjectArray.append("\(i)")
        }
    }

override func numberOfSectionsInTableView(tableView: UITableView) -> Int {
        return 1
    }

override func tableView(tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
        return ObjectArray.count
    }

override func tableView(tableView: UITableView, cellForRowAtIndexPath indexPath: NSIndexPath) -> UITableViewCell {
        let cell = tableView.dequeueReusableCellWithIdentifier("cell", forIndexPath: indexPath)
        cell.textLabel?.text = "这是第\(self.ObjectArray[indexPath.row])行"
        return cell
    }

2⃣添加MJRefresh，并创建桥接文件

　　将MJRefresh拖到项目中：

　　创建桥接文件：

　　new file->source->Header file

　　在项目－building settings中查找“bridging”设置添加的头文件的路径

　　并在.h文件中引入第三方库

　　#import "MJRefresh.h"

3⃣调用刷新方法

override func viewDidLoad() {
        super.viewDidLoad()

for i = 0 ; i<10 ; i++ {
            self.ObjectArray.append("\(i)")
        }
        
        self.tableView.addLegendHeaderWithRefreshingTarget(self,refreshingAction: "headRefresh")
        self.tableView.addGifFooterWithRefreshingTarget(self, refreshingAction: "footRefresh")
    }

func headRefresh(){
        self.Delay(1, closure: { () -> () in
            self.ObjectArray.removeAll(keepCapacity: false)
            for self.i = 0 ; self.i < 10 ; self.i++ {
                self.ObjectArray.append("\(self.i)")
            }
                self.tableView.header.endRefreshing()
                self.tableView.reloadData()
            //self.head.stopRefresh()
            })
    }

func footRefresh(){
            self.Delay(1, closure: { () -> () in
            let j = self.i + 10
            for self.i = 10 ; self.i < j ; self.i++ {
                self.ObjectArray.append("\(self.i)")
            }
                self.tableView.footer.endRefreshing()
                self.tableView.reloadData()
            })
    }
    //延迟函数，模拟服务器延迟
    func Delay(time:Double,closure:()->()){
        dispatch_after(dispatch_time(DISPATCH_TIME_NOW, Int64(time * Double(NSEC_PER_SEC))), dispatch_get_main_queue(), closure)
    }