Tạo PZPullToRefresh in IOS

- Tải thư viện PZPullToRefresh nạp vào dự án :

https://drive.google.com/open?id=10GK938CYcW95jswOcd2dNuAH3Ew0U6Z7

- Cài đặt TableView hay ColletionView :

- Cài đặt cho Pull :

func InitPullToRefresh(){

        

        

        if refreshHeaderView == nil {

            

            let view = PZPullToRefreshView(frame: CGRect(x: 0, y: 0 - self.mCollet.bounds.size.height, width: self.mCollet.bounds.size.width, height: self.mCollet.bounds.size.height))

            

            view.delegate = self

            self.mCollet.addSubview(view)

            

            refreshHeaderView = view

        }

    }

    

    func hidePullToRefresh(){

        

        if (self.refreshHeaderView?.isLoading)! {

            let delay = 0.0 * Double(NSEC_PER_SEC)

            let time  = DispatchTime.now() + Double(Int64(delay)) / Double(NSEC_PER_SEC)

            DispatchQueue.main.asyncAfter(deadline: time, execute: {

                print("Complete loading!")

                self.refreshHeaderView?.isLoading = false

              

                self.refreshHeaderView?.refreshScrollViewDataSourceDidFinishedLoading(self.mCollet)

                

                

            })

        }

    }

- Hàm mở rộng :

extension ViewController : UIScrollViewDelegate {

    

    func scrollViewWillEndDragging(_ scrollView: UIScrollView, withVelocity velocity: CGPoint, targetContentOffset: UnsafeMutablePointer<CGPoint>) {

        

        

        

    }

    func scrollViewDidScroll(_ scrollView: UIScrollView) {

        refreshHeaderView?.refreshScrollViewDidScroll(scrollView)

     

       

    }

    

    func scrollViewDidEndDragging(_ scrollView: UIScrollView, willDecelerate decelerate: Bool) {

        refreshHeaderView?.refreshScrollViewDidEndDragging(scrollView)

    }

}

extension ViewController : PZPullToRefreshDelegate {

    

    func pullToRefreshDidTrigger(_ view: PZPullToRefreshView) -> () {

        

        

        self.refreshHeaderView?.isLoading = true

       

        print( "PullToRefresh1" )

        hidePullToRefresh()

        

    }

    

    func pullToRefreshLastUpdated(_ view: PZPullToRefreshView) -> Date {

        return Date()

        

    }

    

}