UITableView load more when scrolling to bottom

Question

I would like to load more data and create additional cells when the user scrolls to the bottom of the table. I\'m using JSON data and MySql.

func dataJsonFro         


        

Answer 1

You need one very handy delegate method:

func tableView(tableView: UITableView, willDisplayCell cell: UITableViewCell , forRowAtIndexPath indexPath: NSIndexPath) {

}

This method gives your the current displayed row. Use the indexPath it provides to determine when you are nearing the bottom of the table. Then get more JSON and reload the table.

Answer 2

you have to use this method

override func tableView(tableView: UITableView, willDisplayCell cell: UITableViewCell, forRowAtIndexPath indexPath: NSIndexPath) {
            let lastElement = dataSource.count - 1
            if indexPath.row == lastElement {
                // handle your logic here to get more items, add it to dataSource and reload tableview
                }    
        }

Answer 3

Use this library. https://github.com/samvermette/SVPullToRefresh

This will full fill your requirements. You just need to change page number or timestamp every time, when new web-service will be called.

Answer 4

Its Called pagination to tableview. Pagination is used to show large data on a table in an effective way. Here's you can get nice tutorial for objective-c and for swift look at this Question.

And you can download example in swift from Here.

Answer 5

Xcode 8, Swift 3

func tableView(_ tableView: UITableView, willDisplay cell: UITableViewCell, forRowAt indexPath: IndexPath) {
    let lastElement = dataSource.count - 1
    if !loadingData && indexPath.row == lastElement {
        indicator.startAnimating()
        loadingData = true
        loadMoreData()
    }
}

Answer 6

i used this method and it's works for me

 func scrollViewDidScroll(scrollView: UIScrollView) {
    let offsetY = scrollView.contentOffset.y
    let contentHeight = scrollView.contentSize.height

    if offsetY > contentHeight - scrollView.frame.size.height {


        loadMoreDataFromServer()
        self.tableView.reloadData()
    }
}