CODEWITHSUNDEEP
iosswiftuitableviewuiscrollview
gaurav gupta
gaurav gupta

Reputation: 125

scrollViewDidEndDragging not called in UITableview when data is less

I am using pagination to show manage multiple data. Pagination works on both sides top and bottom. For this, I am using below code to call API. But I have faced the issue when data is not greater then tableView height. In this case scrollViewDidEndDragging method not called. So please tell me how to solve this problem. below code is working fine when data is greater then tableView height.

func scrollViewDidEndDragging(_ scrollView: UIScrollView, willDecelerate decelerate: Bool) {
    if(scrollView.panGestureRecognizer.translation(in: scrollView.superview).y > 0) {
        print("up")
        if workerInfo.count > 0 {
            let topVisibleIndexPath:IndexPath = self.tableView.indexPathsForVisibleRows![0]
            if topVisibleIndexPath.row == 0 && startCount != 0 && !isDataLoading {
                isDataLoading = true
                startCount = startCount - requiredCount
                self.callAPI(isCallFromPagination: true)
            }
         }
     }
     else {
         print("down")
         if workerInfo.count > 0 {
             let arrayOfVisibleItems = tableView.indexPathsForVisibleRows?.sorted()
             let lastIndexPath = arrayOfVisibleItems!.last
             //  print("Array: ", arrayOfVisibleItems)
             print("Last IndexPath: ", lastIndexPath as Any)
             if lastIndexPath?.row == workerInfo.count - 1 && !isDataLoading {
                 isDataLoading = true
                 startCount = startCount + requiredCount
                 self.callAPI(isCallFromPagination: true)
             }
         }
    }
}

Upvotes: 2

Views: 2502

Answers (3)

Anji Mendpara
Anji Mendpara

Reputation: 90

enter image description here

Can you please check this properties.In my code its works perfectly.

extension ViewController: UIScrollViewDelegate {

func scrollViewDidEndDragging(_ scrollView: UIScrollView, willDecelerate decelerate: Bool) {
        print("Called")
   }
  }

Upvotes: 2

Sarath Raveendran
Sarath Raveendran

Reputation: 439

// Support Pagination
extension TableViewController: UIScrollViewDelegate {

    // Set Pagination Trigger before DataSoruce remaining 6 items display
    func tableView(_ tableView: UITableView, willDisplay cell: UITableViewCell, forRowAt indexPath: IndexPath) {

        // Load More
        setupPaginationAt(indexPath)
    }



    // If we reached at the end, check again if anything to load
    func scrollViewWillBeginDecelerating(_ scrollView: UIScrollView) {

        let bottomEdge = scrollView.contentOffset.y + scrollView.frame.size.height
        if (bottomEdge >= scrollView.contentSize.height) {

            // We are at the end
            setupPaginationAt(nil)
        }
    }



    func setupPaginationAt(_ indexPath: IndexPath?) {

        // If any network calls on the way, we must leave - Declare a Bool variable and manipulate the value of it
        if isLoading {

            return
        }


        // Validation
        guard let _dataSource = YourDataSource else {

           print("DataSource found empty")
           return
        }



        // Config Pagination Call
        func execute() {

            // Get Current Pagination - Hope you have page index's from API
            if let currentPage = dataSource.pageIndex, let lastPage = dataSource.totalPages {

                if currentPage < lastPage {

                    let nextPage = currentPage + 1
                    loadData(at: nextPage)
                }
            }
        }


        // Check InBetween or End
        if let _indexPath = indexPath {

            if  _indexPath.row == _dataSource.count - 6 {

                execute()
            }
        } else {

            // Assume End
            execute()
        }
    }
}

This solution should work.

Upvotes: 1

Anji Mendpara
Anji Mendpara

Reputation: 90

You can keep your table view bounce and scrollview bounce True. then scrollViewDidEndDragging method called

Upvotes: 0

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