UITableView load more when scrolling to bottom like Facebook application

Question

I am developing an application that uses SQLite  I want to show a list of users  UITableView  using a paginating mechanism  Could any one please tell me how to load more data in my list when the user scrolls to the end of the list  like on home page on Facebook application

User · Answer

Details  Swift 5 1  Xcode 11 2 1  Solution  Worked with UIScrollView   UICollectionView   UITableView  import UIKit  class LoadMoreActivityIndicator        private let spacingFromLastCell  CGFloat     private let spacingFromLastCellWhenLoadMoreActionStart  CGFloat     private weak var activityIndicatorView  UIActivityIndicatorView      private weak var scrollView  UIScrollView       private var defaultY  CGFloat           guard let height   scrollView  contentSize height else   return 0 0           return height   spacingFromLastCell            deinit   activityIndicatorView  removeFromSuperview          init  scrollView  UIScrollView  spacingFromLastCell  CGFloat  spacingFromLastCellWhenLoadMoreActionStart  CGFloat            self scrollView   scrollView         self spacingFromLastCell   spacingFromLastCell         self spacingFromLastCellWhenLoadMoreActionStart   spacingFromLastCellWhenLoadMoreActionStart         let size CGFloat   40         let frame   CGRect x   scrollView frame width-size  2  y  scrollView contentSize height   spacingFromLastCell  width  size  height  size          let activityIndicatorView   UIActivityIndicatorView frame  frame          if  available iOS 13 0                           activityIndicatorView color    label                   else                       activityIndicatorView color    black                   activityIndicatorView autoresizingMask     flexibleLeftMargin   flexibleRightMargin          activityIndicatorView hidesWhenStopped   true         scrollView addSubview activityIndicatorView          self activityIndicatorView   activityIndicatorView            private var isHidden  Bool           guard let scrollView   scrollView else   return true           return scrollView contentSize height  lt  scrollView frame size height            func start closure      - gt  Void              guard let scrollView   scrollView  let activityIndicatorView   activityIndicatorView else   return           let offsetY   scrollView contentOffset y         activityIndicatorView isHidden   isHidden         if  isHidden  amp  amp  offsetY  gt   0               let contentDelta   scrollView contentSize height - scrollView frame size height             let offsetDelta   offsetY - contentDelta                          let newY   defaultY-offsetDelta             if newY  lt  scrollView frame height                   activityIndicatorView frame origin y   newY               else                   if activityIndicatorView frame origin y    defaultY                       activityIndicatorView frame origin y   defaultY                                              if  activityIndicatorView isAnimating                   if offsetY  gt  contentDelta  amp  amp  offsetDelta  gt   spacingFromLastCellWhenLoadMoreActionStart  amp  amp   activityIndicatorView isAnimating                       activityIndicatorView startAnimating                       closure                                                 if scrollView isDecelerating                   if activityIndicatorView isAnimating  amp  amp  scrollView contentInset bottom    0                       UIView animate withDuration  0 3     weak self  in                         if let bottom   self  spacingFromLastCellWhenLoadMoreActionStart                               scrollView contentInset   UIEdgeInsets top  0  left  0  bottom  bottom  right  0                                                                                                       func stop completion      - gt  Void     nil            guard let scrollView   scrollView   let activityIndicatorView   activityIndicatorView else   return           let contentDelta   scrollView contentSize height - scrollView frame size height         let offsetDelta   scrollView contentOffset y - contentDelta         if offsetDelta  gt   0               UIView animate withDuration  0 3  animations                    scrollView contentInset   UIEdgeInsets top  0  left  0  bottom  0  right  0                     in completion                else               scrollView contentInset   UIEdgeInsets top  0  left  0  bottom  0  right  0              completion                      activityIndicatorView stopAnimating            Usage init activityIndicator   LoadMoreActivityIndicator scrollView  tableView  spacingFromLastCell  10  spacingFromLastCellWhenLoadMoreActionStart  60   handling extension ViewController  UITableViewDelegate       func scrollViewDidScroll   scrollView  UIScrollView            activityIndicator start               DispatchQueue global qos   utility  async                   sleep 3                  DispatchQueue main async    weak self  in                     self  activityIndicator stop                                                      Full Sample  Do not forget to paste the solution code   import UIKit  class ViewController  UIViewController            fileprivate var activityIndicator  LoadMoreActivityIndicator           override func viewDidLoad             super viewDidLoad           let tableView   UITableView frame  view frame          view addSubview tableView          tableView translatesAutoresizingMaskIntoConstraints   false         tableView topAnchor constraint equalTo  view topAnchor  isActive   true         tableView bottomAnchor constraint equalTo  view bottomAnchor  isActive   true         tableView leftAnchor constraint equalTo  view leftAnchor  isActive   true         tableView rightAnchor constraint equalTo  view rightAnchor  isActive   true                  tableView dataSource   self         tableView delegate   self         tableView tableFooterView   UIView           activityIndicator   LoadMoreActivityIndicator scrollView  tableView  spacingFromLastCell  10  spacingFromLastCellWhenLoadMoreActionStart  60           extension ViewController  UITableViewDataSource            func numberOfSections in tableView  UITableView  - gt  Int           return 1                func tableView   tableView  UITableView  numberOfRowsInSection section  Int  - gt  Int           return 30                func tableView   tableView  UITableView  cellForRowAt indexPath  IndexPath  - gt  UITableViewCell           let cell   UITableViewCell           cell textLabel  text    quot   indexPath  quot          return cell          extension ViewController  UITableViewDelegate       func scrollViewDidScroll   scrollView  UIScrollView            activityIndicator start               DispatchQueue global qos   utility  async                   for i in 0   lt 3                       print  quot             i  quot                       sleep 1                                    DispatchQueue main async    weak self  in                     self  activityIndicator stop                                                      Result

User · Answer

For Xcode 10 1  Swift 4 2  This video seems like a great tutorial   Starter Complete project  https   github com RobCanton Swift-Infinite-Scrolling-Example  import UIKit  class ViewController  UIViewController  UITableViewDataSource  UITableViewDelegate        var tableView UITableView       var fetchingMore   false     var items    0  1  2  3  4  5  6  7  8  9  10  11  12  13  14  15       override func viewDidLoad             super viewDidLoad              Do any additional setup after loading the view  typically from a nib          initTableView              func initTableView             tableView   UITableView frame  view bounds  style   plain          tableView register UITableViewCell self  forCellReuseIdentifier   tableCell           tableView delegate   self         tableView dataSource   self          view addSubview tableView          tableView translatesAutoresizingMaskIntoConstraints   false          let layoutGuide   view safeAreaLayoutGuide         tableView leadingAnchor constraint equalTo  layoutGuide leadingAnchor  isActive   true         tableView topAnchor constraint equalTo  layoutGuide topAnchor  isActive   true         tableView trailingAnchor constraint equalTo  layoutGuide trailingAnchor  isActive   true         tableView bottomAnchor constraint equalTo  layoutGuide bottomAnchor  isActive   true          tableView reloadData             override func didReceiveMemoryWarning             super didReceiveMemoryWarning              Dispose of any resources that can be recreated             func tableView   tableView  UITableView  numberOfRowsInSection section  Int  - gt  Int           return items count            func tableView   tableView  UITableView  cellForRowAt indexPath  IndexPath  - gt  UITableViewCell               let cell   tableView dequeueReusableCell withIdentifier   tableCell   for  indexPath              cell textLabel  text    Item   items indexPath row                return cell            func scrollViewDidScroll   scrollView  UIScrollView            let offsetY   scrollView contentOffset y         let contentHeight   scrollView contentSize height          if offsetY  gt  contentHeight - scrollView frame height   4               if  fetchingMore                   beginBatchFetch                                      func beginBatchFetch             fetchingMore   true         print  Call API here             DispatchQueue main asyncAfter deadline   now     0 50  execute                print  Consider this as API response                let newItems    self items count   self items count   12  map   index in index               self items append contentsOf  newItems              self fetchingMore   false             self tableView reloadData

User · Answer

Details   Swift 5 1  Xcode 11 3 1   Solution     Genetic UITableView Extension For Loadmore    add this UITableView   Extension in your new file  extension UITableView       func indicatorView   - gt  UIActivityIndicatorView          var activityIndicatorView   UIActivityIndicatorView           if self tableFooterView    nil              let indicatorFrame   CGRect x  0  y  0  width  self bounds width  height  40              activityIndicatorView   UIActivityIndicatorView frame  indicatorFrame              activityIndicatorView isHidden   false             activityIndicatorView autoresizingMask     flexibleLeftMargin   flexibleRightMargin              activityIndicatorView isHidden   true             self tableFooterView   activityIndicatorView             return activityIndicatorView          else              return activityIndicatorView                      func addLoading   indexPath IndexPath  closure   escaping     - gt  Void            indicatorView   startAnimating           if let lastVisibleIndexPath   self indexPathsForVisibleRows  last               if indexPath    lastVisibleIndexPath  amp  amp  indexPath row    self numberOfRows inSection  0  - 1                   DispatchQueue main asyncAfter deadline   now     1                        closure                                                     indicatorView   isHidden   false            func stopLoading            indicatorView   stopAnimating           indicatorView   isHidden   true           Now  just add following line of code in UITableViewDelegate Method willDisplay Cell in your ViewController and make sure tableView delegate   self  func tableView   tableView  UITableView  willDisplay cell  UITableViewCell  forRowAt indexPath  IndexPath           need to pass your indexpath then it showing your indicator at bottom      tableView addLoading indexPath               add your code here            append Your array and reload your tableview         tableView stopLoading      stop your indicator           Result    That s it   Hope this helpful  Thank You

User · Answer

it is sample code  func tableView   tableView  UITableView  cellForRowAt indexPath  IndexPath  - gt  UITableViewCell       let cell ShowComplainCell   tableView dequeueReusableCell withIdentifier   quot cell quot    as  ShowComplainCell      let item    self dataArray indexPath row  as  ComplainListItem       let indexPathArray   NSArray array  tableView indexPathsForVisibleRows       let vIndexPath   indexPathArray lastObject as  NSIndexPath      let lastItemReached   item isEqual self dataArray lastObject        if  lastItemReached  amp  amp  vIndexPath row     self dataArray count - 1                     self loadData                       return cell         indexPathArray  is visible rows  vIndexPath is visible last indexpath load data  func loadData            if isReloadTable          let HUD   MBProgressHUD showAdded to  self view  animated  true         let manager  AFHTTPSessionManager   AFHTTPSessionManager                            var param   NSDictionary              param                     quot category quot  cat id                  quot smart user id quot   USERDEF value forKey   quot user id quot   as  String                  quot page quot  page                  quot phone quot  phone  as String                              as  String   Any  as NSDictionary            print  quot param1     param  quot               manager get  quot lists php  quot   parameters  param  progress  nil  success     task URLSessionDataTask  responseObject  Any  in                                              let adsArray    dic  quot results quot   as  NSArray                         for item in adsArray                              let item    ComplainListItem dictionary  item as  NSDictionary                              self dataArray add item                                                                      self view addSubview self cityTableView                         self cityTableView reloadData                                          if adsArray count  10                          self cityTableView reloadData                          self isReloadTable   true                        self page  1                     else if adsArray count lt 10                          self cityTableView reloadData                          self isReloadTable   false                                                 HUD hide animated true                                   operation error  - gt  Void in                print  quot error     error  quot                  HUD hide animated true                                       check your dataArray count which is myadsarray check to equal your data limit  then if dataArray count equal next page is called if not equal which is less then 10  all data is showed or finished

User · Answer

for loading from an API  It works for me  Xcode10   swift 4 2     1- create New Swift file and do like this          apiTVCController swift     ApiTestingTableView        Created by Hooma7n on 4 7 19      Copyright    2019 Hooma7n  All rights reserved      import Foundation import Alamofire  class apiget        var tableData    Datum           var loadin    Datum           var testfortotal   Int        func getfromapi completionHandler       isSucess   Bool  - gt  Void              let url    https   reqres in api users page 1          Alamofire request url  method   get  parameters  nil  encoding  JSONEncoding default  headers  nil               responseJSON completionHandler     response in                 switch response result                   case  success let data                       guard let jsonData   try  JSONSerialization data withJSONObject  data  options  JSONSerialization WritingOptions prettyPrinted  else  return                      let decoder   JSONDecoder                       guard let result   try  decoder decode Welcome self  from  jsonData  else  return                      self tableData   result data                           self testfortotal   result total    0                     completionHandler  true                                         print result                  case  failure let error                       print error                                              var pagecounter   Int   2       func loadmore completionHandler       isSucess   Bool  - gt  Void              let url    https   reqres in api users page   pagecounter           Alamofire request url  method   get  parameters  nil  encoding  JSONEncoding default  headers  nil               responseJSON completionHandler     response in                 switch response result                   case  success let data                       guard let jsonData   try  JSONSerialization data withJSONObject  data  options  JSONSerialization WritingOptions prettyPrinted  else  return                      let decoder   JSONDecoder                       guard let myresult   try  decoder decode Welcome self  from  jsonData  else  return                      self loadin   myresult data                           self tableData append contentsOf  myresult data                            completionHandler  true                      print self pagecounter                      self pagecounter    1                                        print myresult                  case  failure let error                       print error                                              extension apiget        struct Welcome  Codable           let page  perPage  total  totalPages  Int          var data   Datum            enum CodingKeys  String  CodingKey               case page             case perPage    per page              case total             case totalPages    total pages              case data                      struct Datum  Codable           let id  Int          let firstName  lastName  String          let avatar  String           enum CodingKeys  String  CodingKey               case id             case firstName    first name              case lastName    last name              case avatar                       2- in Your ViewController file  tableView Controller            apiTVC swift     ApiTestingTableView        Created by Hooma7n on 4 7 19      Copyright    2019 Hooma7n  All rights reserved      import UIKit import Alamofire  class apiTVC  UITableViewController        var datamodel   apiget        override func viewDidLoad             super viewDidLoad            datamodel getfromapi completionHandler   finish in             if finish  self tableView reloadData                                          override func numberOfSections in tableView  UITableView  - gt  Int           return 1            override func tableView   tableView  UITableView  numberOfRowsInSection section  Int  - gt  Int           return datamodel tableData count            override func tableView   tableView  UITableView  cellForRowAt indexPath  IndexPath  - gt  UITableViewCell            let cell   tableView dequeueReusableCell withIdentifier   Cell   for  indexPath  as  apiTableViewCell         cell firstNameLabel text   datamodel tableData indexPath row  firstName         cell lastNameLabel text   datamodel tableData indexPath row  lastName         cell dateLabel text      datamodel tableData indexPath row  id    0           cell profileImageView loadImage fromURL  datamodel tableData indexPath row  avatar                 return cell             override func tableView   tableView  UITableView  willDisplay cell  UITableViewCell  forRowAt indexPath  IndexPath            let lastElement   datamodel tableData count - 1         let total   datamodel testfortotal    12         if indexPath row    lastElement  amp  amp  datamodel tableData count  lt  total               datamodel loadmore completionHandler   finish in                 if finish                        self tableView reloadData                                            if using tableView in Your viewController set delegate datasource self in viewDidLoad

User · Answer

Just wanna share this approach   -  void scrollViewDidEndDecelerating  UIScrollView   scrollView       NSLog          YourTableView indexPathsForVisibleRows  lastObject         self estimatedTotalData      -  void estimatedTotalData       long currentRow     NSIndexPath     YourTableView indexPathsForVisibleRows  lastObject   row       long estimateDataCount   25       while  currentRow  gt  estimateDataCount                estimateDataCount  25             dataLimit   estimateDataCount       if  dataLimit    currentRow 1                dataLimit  25             NSLog   dataLimit   ld   dataLimit         self requestForData           this answers the question              if YourDataSource count-1    currentRow                NSLog   LAST ROW      loadMore data           NSLog       output would be something like    lt NSIndexPath  0xc0000000002e0016 gt   length   2  path   0 - 92  dataLimit  100  lt NSIndexPath  0xc000000000298016 gt   length   2  path   0 - 83  dataLimit  100  lt NSIndexPath  0xc000000000278016 gt   length   2  path   0 - 79  dataLimit  100  lt NSIndexPath  0xc000000000238016 gt   length   2  path   0 - 71  dataLimit  75  lt NSIndexPath  0xc0000000001d8016 gt   length   2  path   0 - 59  dataLimit  75  lt NSIndexPath  0xc0000000001c0016 gt   length   2  path   0 - 56  dataLimit  75  lt NSIndexPath  0xc000000000138016 gt   length   2  path   0 - 39  dataLimit  50  lt NSIndexPath  0xc000000000120016 gt   length   2  path   0 - 36  dataLimit  50  lt NSIndexPath  0xc000000000008016 gt   length   2  path   0 - 1  dataLimit  25  lt NSIndexPath  0xc000000000008016 gt   length   2  path   0 - 1  dataLimit  25   This is good for displaying data stored locally  Initially I declare the dataLimit to 25  that means uitableview will have 0-24  initially    If the user scrolled to the bottom and the last cell is visible dataLimit will be added with 25      Note  This is more like a UITableView data paging

User · Answer

Swift  Method 1  Did scroll to bottom  Here is the Swift version of Pedro Rom  o s answer  When the user stops scrolling it checks if it has reached the bottom   func scrollViewDidEndDragging scrollView  UIScrollView  willDecelerate decelerate  Bool            UITableView only moves in one direction  y axis     let currentOffset   scrollView contentOffset y     let maximumOffset   scrollView contentSize height - scrollView frame size height         Change 10 0 to adjust the distance from bottom     if maximumOffset - currentOffset  lt   10 0           self loadMore             Method 2  Reached last row  And here is the Swift version of shinyuX s answer  It checks if the user has reached the last row   func tableView tableView  UITableView  cellForRowAtIndexPath indexPath  NSIndexPath  - gt  UITableViewCell           set up cell                    Check if the last row number is the same as the last current data element     if indexPath row    self dataArray count - 1           self loadMore              Example of a loadMore   method  I set up these three class variables for fetching batches of data      number of items to be fetched each time  i e   database LIMIT  let itemsPerBatch   50     Where to start fetching items  database OFFSET  var offset   0     a flag for when all database items have already been loaded var reachedEndOfItems   false   This is the function to load more items from the database into the table view   func loadMore             don t bother doing another db query if already have everything     guard  self reachedEndOfItems else           return               query the db on a background thread     DispatchQueue global qos   background  async               determine the range of data items to fetch         var thisBatchOfItems   MyObjects           let start   self offset         let end   self offset   self itemsPerBatch             query the database         do                  SQLite swift wrapper             thisBatchOfItems   try MyDataHelper findRange start   lt end            catch                 print  query failed                         update UITableView with new batch of items on main thread after query finishes         DispatchQueue main async                if let newItems   thisBatchOfItems                       append the new items to the data source for the table view                 self myObjectArray appendContentsOf newItems                      reload the table view                 self tableView reloadData                       check if this was the last of the data                 if newItems count  lt  self itemsPerBatch                       self reachedEndOfItems   true                     print  reached end of data  Batch count    newItems count                                          reset the offset for the next data query                 self offset    self itemsPerBatch

User · Answer

- void tableView  UITableView   tableView willDisplayCell  UITableViewCell   cell forRowAtIndexPath  NSIndexPath   indexPath    NSInteger sectionsAmount    tableView numberOfSections   NSInteger rowsAmount    tableView numberOfRowsInSection  indexPath section    if   indexPath section     sectionsAmount - 1  amp  amp   indexPath row     rowsAmount - 1          get last row     if   isSearchActive  amp  amp   isFilterSearchActive            if  totalRecords   8    0                int64 t delayInSeconds   2 0              dispatch time t popTime   dispatch time DISPATCH TIME NOW  delayInSeconds   NSEC PER SEC               dispatch after popTime  dispatch get main queue      void                   yourTableView beginUpdates                yourTableView insertRowsAtIndexPaths indexPaths withRowAnimation UITableViewRowAnimationAutomatic                yourTableView endUpdates

User · Answer

-  NSInteger tableView  UITableView   tableView numberOfRowsInSection  NSInteger section        if  news count    0            return 0        else           return news count    1            -  UITableViewCell   tableView  UITableView   tableView cellForRowAtIndexPath  NSIndexPath   indexPath        try            uint position    uint   indexPath row           NSUInteger row    indexPath row           NSUInteger count    news count              show Load More         if  row    count                UITableViewCell  cell   nil               static NSString  LoadMoreId     LoadMore               cell    tableView dequeueReusableCellWithIdentifier LoadMoreId               if  cell    nil                    cell     UITableViewCell alloc                          initWithStyle UITableViewCellStyleDefault                       reuseIdentifier LoadMoreId                             if   hasMoreLoad                    cell hidden   true                else                    cell textLabel text     Load more items                      cell textLabel textColor    UIColor blueColor                   cell textLabel font    UIFont boldSystemFontOfSize 14                   NSLog   Load more                    if   isMoreLoaded                        isMoreLoaded   true                       self performSelector  selector loadMoreNews  withObject nil afterDelay 0 1                                                return cell             else               NewsRow  cell   nil               NewsObject  newsObject   news position               static NSString  CellIdentifier     NewsRow               cell    tableView dequeueReusableCellWithIdentifier CellIdentifier                if  cell    nil                       Load the top-level objects from the custom cell XIB                  NSArray  topLevelObjects     NSBundle mainBundle  loadNibNamed CellIdentifier owner self options nil                      Grab a pointer to the first object  presumably the custom cell  as that s all the XIB should contain                   cell   topLevelObjects 0                      Configure the cell                                cell title text   newsObject title                           return cell                        catch  NSException  exception            NSLog   Exception occurred           exception   exception userInfo              return nil      very good explanation on this post   http   useyourloaf com blog 2010 10 02 dynamically-loading-new-rows-into-a-table html  simple you have to add last row and hide it and when table row hit last row than show the row and load more items

User · Answer

Better to use willDisplayCell method to check if which cell will be loaded   Once we get the current indexPath row is last we can load more cells   This will load more cells on scrolling down    -  void tableView  UITableView   tableView         willDisplayCell  UITableViewCell   cell            forRowAtIndexPath  NSIndexPath   indexPath          check if indexPath row is last row        Perform operation to load new Cell s

User · Answer

Below link will provide sample code   Swift3  User need to pull up last table view cell  at least hight of 2 cell to fetch more data from server    You will found Process cell also to show loading process as in last cell   Its in Swift3  https   github com yogendrabagoriya YBTableViewPullData

User · Answer

I have implemented one solution that i found in stackoverflow  and it works fine  but i think the shinyuX s solution it s very easy to implement and works fine for my propose  If someone wants a different solution can use this one below   -  void scrollViewDidEndDragging  UIScrollView   scrollView willDecelerate  BOOL decelerate         UITableView only moves in one direction  y axis     CGFloat currentOffset   scrollView contentOffset y      CGFloat maximumOffset   scrollView contentSize height - scrollView frame size height         NSInteger result   maximumOffset - currentOffset          Change 10 0 to adjust the distance from bottom     if  maximumOffset - currentOffset  lt   10 0             self loadOneMorePage              self methodThatAddsDataAndReloadsTableView

User · Answer

One more option to use  Swift 3 and iOS 10     class DocumentEventsTableViewController  UITableViewController  UITableViewDataSourcePrefetching         var currentPage  Int   1      let pageSize  Int   10    num of items in one page       override func viewDidLoad              super viewDidLoad             self tableView prefetchDataSource   self              func tableView   tableView  UITableView  prefetchRowsAt indexPaths   IndexPath              let upcomingRows   indexPaths map    0 row             if let maxIndex   upcomingRows max                  let nextPage  Int   Int ceil Double maxIndex    Double pageSize      1              if nextPage  gt  currentPage                       Your function  which attempts to load respective page from the local database                  loadLocalData page  nextPage                       Your function  which makes a network request to fetch the respective page of data from the network                  startLoadingDataFromNetwork page  nextPage                     currentPage   nextPage                                       For rather small pages    10 items  you might want to manually add data for pages 1 and 2 because nextPage might be somewhere about 1-2 until the table has a few items to be scrolled well  But it will work great for all next pages

User · Answer

you should check ios UITableViewDataSourcePrefetching   class ViewController  UIViewController        IBOutlet weak var mytableview  UITableView       override func viewDidLoad             super viewDidLoad           mytableview prefetchDataSource   self         func tableView   tableView  UITableView  prefetchRowsAt indexPaths   IndexPath             print  prefetchdRowsAtIndexpath   indexPaths               func tableView   tableView  UITableView  cancelPrefetchingForRowsAt indexPaths   IndexPath             print  cancelPrefetchingForRowsAtIndexpath   indexPaths                 https   developer apple com documentation uikit uitableviewdatasourceprefetching https   andreygordeev com 2017 02 20 uitableview-prefetching

User · Answer

let threshold   100 0    threshold from bottom of tableView var isLoadingMore   false    flag   func scrollViewDidScroll scrollView  UIScrollView        let contentOffset   scrollView contentOffset y     let maximumOffset   scrollView contentSize height - scrollView frame size height       if  isLoadingMore  amp  amp   maximumOffset - contentOffset  lt   threshold               Get more data - API call         self isLoadingMore   true             Update UI         dispatch async dispatch get main queue                  tableView reloadData               self isLoadingMore   false

User · Answer

Use limit and offset in your queries and fill your tableview with that content  When the user scrolls down  load the next offset   Implement the tableView willDisplayCell forRowAtIndexPath  method in your UITableViewDelegate and check to see if it s the last row

User · Answer

-  void tableView  UITableView   tableView willDisplayCell  UITableViewCell   cell forRowAtIndexPath  NSIndexPath   indexPath       NSInteger lastSectionIndex    tableView numberOfSections  - 1      NSInteger lastRowIndex    tableView numberOfRowsInSection lastSectionIndex  - 1      if   indexPath section    lastSectionIndex   amp  amp   indexPath row    lastRowIndex                This is the last cell          self loadMore             If you are using Core Data and NSFetchedResultsController  then loadMore could look like the following      Load more -  void loadMore        self fetchedResultsController fetchRequest setFetchLimit newFetchLimit        NSFetchedResultsController deleteCacheWithName   cache name        NSError  error      if    self fetchedResultsController performFetch  amp error                Update to handle the error appropriately          NSLog   Unresolved error          error   error userInfo                self tableView reloadData

User · Answer

You can do that by adding a check on where you re at in the cellForRowAtIndexPath  method  This method is easy to understand and to implement    -  UITableViewCell   tableView  UITableView   tableView cellForRowAtIndexPath  NSIndexPath   indexPath          Classic start method     static NSString  cellIdentifier     MyCell       MyCell  cell    tableView dequeueReusableCellWithIdentifier cellIdentifier       if   cell                cell     MyCell alloc  initWithStyle UITableViewCellStyleDefault reuseIdentifier MainMenuCellIdentifier              MyData  data    self dataArray objectAtIndex indexPath row          Do your cell customisation        cell titleLabel text   data title       BOOL lastItemReached    data isEqual   self dataArray  lastObject         if   lastItemReached  amp  amp  indexPath row     self dataArray count  - 1                 self launchReload             EDIT   added a check on last item to prevent recursion calls  You ll have to implement the method defining whether the last item has been reached or not   EDIT2   explained lastItemReached

User · Answer

The best way to solve this problem is to add cell at the bottom of your table  and this cell will hold indicator    In swift you need to add this     Create new cell of type cellLoading this will hold the indicator  Look at the code below Look at the num of rows and add 1 to it  This is for loading cell   you need to check in the rawAtIndex if idexPath row    yourArray count then return Loading cell     look at code below   import UIKit  class LoadingCell  UITableViewCell     IBOutlet weak var indicator  UIActivityIndicatorView        For table view       numOfRows   func tableView   tableView  UITableView  numberOfRowsInSection section  Int  - gt  Int       return  yourArray count   1     cellForRawAt indexPath   func tableView   tableView  UITableView  cellForRowAt indexPath  IndexPath  - gt  UITableViewCell        if indexPath row    users count               need to change         let loading   Bundle main loadNibNamed  LoadingCell   owner  LoadingCell self   options  nil   first as  LoadingCell         return loading             let yourCell   tableView dequeueReusableCell withIdentifier   cellCustomizing   for  indexPath  as  UITableViewCell      return yourCell      If you notice that my loading cell is created from a nib file  This videos will explain what I did

[ios] UITableView load more when scrolling to bottom like Facebook application

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