Have a reloadData for a UITableView animate when changing

Question

I have a UITableView that has two modes   When we switch between the modes I have a different number of sections and cells per section   Ideally  it would do some cool animation when the table grows or shrinks   Here is the code I tried  but it doesn t do anything   CGContextRef context   UIGraphicsGetCurrentContext      UIView beginAnimations nil context context     UIView setAnimationCurve UIViewAnimationCurveEaseInOut     UIView setAnimationDuration 0 5      self tableView reloadData    UIView commitAnimations     Any thoughts on how I could do this

User · Answer

If you want to add your own custom animations to UITableView cells, use

[theTableView reloadData];
[theTableView layoutSubviews];
NSArray* visibleViews = [theTableView visibleCells];

to get an array of visible cells. Then add any custom animation to each cell.

Check out this gist I posted for a smooth custom cell animation. https://gist.github.com/floprr/1b7a58e4a18449d962bd

User · Answer

Animating without reloadData   in Swift can be done like this  as of version 2 2    tableview beginUpdates   var indexPathsToDeleteForAnimation   NSIndexPath       var numOfCellsToRemove   ArrayOfItemsToRemove    0     Do your work here while numOfCellsToRemove  gt  0             or here  if you need to add remove the same amount of objects to from somewhere     indexPathsToDeleteForAnimation append NSIndexPath forRow  selectedCellIndex numOfCellsToRemove  inSection  0       numOfCellsToRemove -  1   tableview deleteRowsAtIndexPaths indexPathsToDeleteForAnimation  withRowAnimation  UITableViewRowAnimation Right  tableview endUpdates     in case you need to call reloadData   after the animation ends  you can embrace the changes in CATransaction like this   CATransaction begin   CATransaction setCompletionBlock     in self tableview reloadData      tableview beginUpdates   var indexPathsToDeleteForAnimation   NSIndexPath       var numOfCellsToRemove   ArrayOfItemsToRemove count    0     Do your work here while numOfCellsToRemove  gt  0              or here  if you need to add remove the same amount of objects to from somewhere      indexPathsToDeleteForAnimation append NSIndexPath forRow  selectedCellIndex numOfCellsToRemove  inSection  0        numOfCellsToRemove -  1   tableview deleteRowsAtIndexPaths indexPathsToDeleteForAnimation  withRowAnimation  UITableViewRowAnimation Right  tableview endUpdates   CATransaction commit     The logic is shown for the case when you delete rows  but the same idea works also for adding rows  You can also change animation to UITableViewRowAnimation Left to make it neat  or choose from the list of other available animations

User · Answer

Native UITableView animations in Swift   Insert and delete rows all at once with tableView performBatchUpdates so they occur simultaneously  Building on the answer from  iKenndac use methods such as    tableView insertSections tableView insertRows tableView deleteSections tableView deleteRows   Ex    tableView performBatchUpdates      tableView insertSections  0   with   top        This inserts a section at the zero position with an animation that loads from the top  This will re-run the cellForRowAt method and check for a new cell at that position  You could reload the entire table view this way with specific animations    Re  the OP question  a conditional flag would have been needed to show the cells for the alternate table view state

User · Answer

In my case  I wanted to add 10 more rows into the tableview  for a  show more results  type of functionality  and I did the following     NSInteger tempNumber   self numberOfRows    self numberOfRows    10    NSMutableArray  arrayOfIndexPaths     NSMutableArray alloc  init     for  NSInteger i   tempNumber  i  lt  self numberOfRows  i           arrayOfIndexPaths addObject  NSIndexPath indexPathForRow i inSection 0           self tableView beginUpdates      self tableView insertRowsAtIndexPaths arrayOfIndexPaths withRowAnimation UITableViewRowAnimationTop      self tableView endUpdates     In most cases  instead of  self numberOfRows   you would usually use the count of the array of objects for the tableview  So to make sure this solution works well for you   arrayOfIndexPaths  needs to be an accurate array of the index paths of the rows being inserted  If the row exists for any of this index paths  the code might crash  so you should use the method  reloadRowsAtIndexPaths withRowAnimation   for those index pathds to avoid crashing

User · Answer

You might want to use   Objective-C   UIView transitionWithView  self tableView                   duration  0 35f                    options  UIViewAnimationOptionTransitionCrossDissolve                 animations    void            self tableView reloadData                      completion  nil     Swift  UIView transitionWithView tableView                            duration  0 35                            options   TransitionCrossDissolve                            animations       - gt  Void in     self tableView reloadData                                completion  nil     Swift 3  4  amp  5  UIView transition with  tableView                    duration  0 35                    options   transitionCrossDissolve                    animations    self tableView reloadData         left out the unnecessary syntax in the completion block and the optional completion parameter   No hassles   D  You can also use any of the UIViewAnimationOptionTransitions you want for cooler effects    transitionNone transitionFlipFromLeft transitionFlipFromRight transitionCurlUp transitionCurlDown transitionCrossDissolve transitionFlipFromTop transitionFlipFromBottom

User · Answer

All of these answers assume that you are using a UITableView with only 1 section   To accurately handle situations where you have more than 1 section use   NSRange range   NSMakeRange 0  myTableView numberOfSections   NSIndexSet  indexSet    NSIndexSet indexSetWithIndexesInRange range    myTableView reloadSections indexSet withRowAnimation UITableViewRowAnimationAutomatic      Note  you should make sure that you have more than 0 sections    Another thing to note is that you may run into a NSInternalInconsistencyException if you attempt to simultaneously update your data source with this code   If this is the case  you can use logic similar to this   int sectionNumber   0    Note that your section may be different  int nextIndex    currentItems count     starting index of newly added items   myTableView beginUpdates    for  NSObject  item in itemsToAdd          Add the item to the data source      currentItems addObject item          Add the item to the table view     NSIndexPath  path    NSIndexPath indexPathForRow nextIndex   inSection sectionNumber        myTableView insertRowsAtIndexPaths  NSArray arrayWithObject path  withRowAnimation UITableViewRowAnimationAutomatic       myTableView endUpdates

User · Answer

CATransition  animation    CATransition animation   animation duration    3   animation setType kCATransitionPush    animation setSubtype kCATransitionFromLeft    animation setTimingFunction  CAMediaTimingFunction functionWithName kCAMediaTimingFunctionEaseInEaseOut     animation setDuration  3       elementTableView layer  addAnimation animation forKey   UITableViewReloadDataAnimationKey      tableView reloadData

User · Answer

Swift Implementation   let range   NSMakeRange 0  self tableView  numberOfSections    let indexSet   NSIndexSet indexesInRange  range  self tableView  reloadSections indexSet  withRowAnimation  UITableViewRowAnimation Automatic

User · Answer

To reload all sections  not just one with custom duration   User duration parameter of UIView animate to set custom duration   UIView animate withDuration  0 4  animations     weak self  in     guard let  self    self else   return       let indexSet   IndexSet integersIn  0   lt self tableView numberOfSections      self tableView reloadSections indexSet  with  UITableView RowAnimation fade

User · Answer

Swift 4 version for  dmarnel answer   tableView reloadSections IndexSet integer  0   with   automatic

User · Answer

Have more freedom using CATransition class   It isn t limited to fading  but can do movements as well      For example    don t forget to import QuartzCore   CATransition  transition    CATransition animation   transition type   kCATransitionPush  transition timingFunction    CAMediaTimingFunction functionWithName kCAMediaTimingFunctionEaseInEaseOut   transition fillMode   kCAFillModeForwards  transition duration   0 5  transition subtype   kCATransitionFromBottom     self tableView layer  addAnimation transition forKey   UITableViewReloadDataAnimationKey      Change the type to match your needs  like kCATransitionFade etc   Implementation in Swift   let transition   CATransition   transition type   kCATransitionPush transition timingFunction   CAMediaTimingFunction name  kCAMediaTimingFunctionEaseInEaseOut  transition fillMode   kCAFillModeForwards transition duration   0 5 transition subtype   kCATransitionFromTop self tableView layer addAnimation transition  forKey   UITableViewReloadDataAnimationKey      Update your data source here self tableView reloadData     Reference for CATransition  Swift 5   let transition   CATransition   transition type   CATransitionType push transition timingFunction   CAMediaTimingFunction name  CAMediaTimingFunctionName easeInEaseOut  transition fillMode   CAMediaTimingFillMode forwards transition duration   0 5 transition subtype   CATransitionSubtype fromTop self tableView layer add transition  forKey   UITableViewReloadDataAnimationKey      Update your data source here self tableView reloadData

User · Answer

I believe you can just update your data structure  then    tableView beginUpdates    tableView deleteSections  NSIndexSet indexSetWithIndex 0  withRowAnimation YES    tableView insertSections  NSIndexSet indexSetWithIndex 0  withRowAnimation YES    tableView endUpdates     Also  the  withRowAnimation  is not exactly a boolean  but an animation style   UITableViewRowAnimationFade  UITableViewRowAnimationRight  UITableViewRowAnimationLeft  UITableViewRowAnimationTop  UITableViewRowAnimationBottom  UITableViewRowAnimationNone  UITableViewRowAnimationMiddle

User · Answer

You might want to use   Objective-C   UIView transitionWithView  self tableView                   duration  0 35f                    options  UIViewAnimationOptionTransitionCrossDissolve                 animations    void            self tableView reloadData                      completion  nil     Swift  UIView transitionWithView tableView                            duration  0 35                            options   TransitionCrossDissolve                            animations       - gt  Void in     self tableView reloadData                                completion  nil     Swift 3  4  amp  5  UIView transition with  tableView                    duration  0 35                    options   transitionCrossDissolve                    animations    self tableView reloadData         left out the unnecessary syntax in the completion block and the optional completion parameter   No hassles   D  You can also use any of the UIViewAnimationOptionTransitions you want for cooler effects    transitionNone transitionFlipFromLeft transitionFlipFromRight transitionCurlUp transitionCurlDown transitionCrossDissolve transitionFlipFromTop transitionFlipFromBottom

User · Answer

Native UITableView animations in Swift   Insert and delete rows all at once with tableView performBatchUpdates so they occur simultaneously  Building on the answer from  iKenndac use methods such as    tableView insertSections tableView insertRows tableView deleteSections tableView deleteRows   Ex    tableView performBatchUpdates      tableView insertSections  0   with   top        This inserts a section at the zero position with an animation that loads from the top  This will re-run the cellForRowAt method and check for a new cell at that position  You could reload the entire table view this way with specific animations    Re  the OP question  a conditional flag would have been needed to show the cells for the alternate table view state

User · Answer

UITableView has a field called   indexPathsForVisibleRows  that you can use to animate the visible rows using the  reloadItemsAtIndexPaths  method      guard let indexPaths   tableView indexPathsForVisibleRows     else   return            self tableView layoutIfNeeded       self tableView reloadItemsAtIndexPaths indexPaths  animationStyle   automatic

User · Answer

I believe you can just update your data structure  then    tableView beginUpdates    tableView deleteSections  NSIndexSet indexSetWithIndex 0  withRowAnimation YES    tableView insertSections  NSIndexSet indexSetWithIndex 0  withRowAnimation YES    tableView endUpdates     Also  the  withRowAnimation  is not exactly a boolean  but an animation style   UITableViewRowAnimationFade  UITableViewRowAnimationRight  UITableViewRowAnimationLeft  UITableViewRowAnimationTop  UITableViewRowAnimationBottom  UITableViewRowAnimationNone  UITableViewRowAnimationMiddle

User · Answer

Have more freedom using CATransition class   It isn t limited to fading  but can do movements as well      For example    don t forget to import QuartzCore   CATransition  transition    CATransition animation   transition type   kCATransitionPush  transition timingFunction    CAMediaTimingFunction functionWithName kCAMediaTimingFunctionEaseInEaseOut   transition fillMode   kCAFillModeForwards  transition duration   0 5  transition subtype   kCATransitionFromBottom     self tableView layer  addAnimation transition forKey   UITableViewReloadDataAnimationKey      Change the type to match your needs  like kCATransitionFade etc   Implementation in Swift   let transition   CATransition   transition type   kCATransitionPush transition timingFunction   CAMediaTimingFunction name  kCAMediaTimingFunctionEaseInEaseOut  transition fillMode   kCAFillModeForwards transition duration   0 5 transition subtype   kCATransitionFromTop self tableView layer addAnimation transition  forKey   UITableViewReloadDataAnimationKey      Update your data source here self tableView reloadData     Reference for CATransition  Swift 5   let transition   CATransition   transition type   CATransitionType push transition timingFunction   CAMediaTimingFunction name  CAMediaTimingFunctionName easeInEaseOut  transition fillMode   CAMediaTimingFillMode forwards transition duration   0 5 transition subtype   CATransitionSubtype fromTop self tableView layer add transition  forKey   UITableViewReloadDataAnimationKey      Update your data source here self tableView reloadData

User · Answer

The way to approach this is to tell the tableView to remove and add rows and sections with the  insertRowsAtIndexPaths withRowAnimation    deleteRowsAtIndexPaths withRowAnimation    insertSections withRowAnimation  and  deleteSections withRowAnimation   methods of UITableView     When you call these methods  the table will animate in out the items you requested  then call reloadData on itself so you can update the state after this animation  This part is important - if you animate away everything but don t change the data returned by the table s dataSource  the rows will appear again after the animation completes    So  your application flow would be    self setTableIsInSecondState YES     myTable deleteSections  NSIndexSet indexSetWithIndex 0  withRowAnimation YES     As long as your table s dataSource methods return the correct new set of sections and rows by checking  self tableIsInSecondState   or whatever   this will achieve the effect you re looking for

User · Answer

I can t comment on the top answer  but a swift implementation would be    self tableView reloadSections  0   with  UITableViewRowAnimation fade    you could include as many sections as you want to update in the first argument for reloadSections   Other animations available from the docs  https   developer apple com reference uikit uitableviewrowanimation  fade The inserted or deleted row or rows fade into or out of the table view   right The inserted row or rows slide in from the right  the deleted row or rows slide out to the right   left The inserted row or rows slide in from the left  the deleted row or rows slide out to the left   top The inserted row or rows slide in from the top  the deleted row or rows slide out toward the top   bottom The inserted row or rows slide in from the bottom  the deleted row or rows slide out toward the bottom   case none The inserted or deleted rows use the default animations   middle The table view attempts to keep the old and new cells centered in the space they did or will occupy  Available in iPhone 3 2   automatic The table view chooses an appropriate animation style for you   Introduced in iOS 5 0

User · Answer

For Swift 4  tableView reloadSections  0   with  UITableView RowAnimation fade

User · Answer

If you want to add your own custom animations to UITableView cells, use

[theTableView reloadData];
[theTableView layoutSubviews];
NSArray* visibleViews = [theTableView visibleCells];

to get an array of visible cells. Then add any custom animation to each cell.

Check out this gist I posted for a smooth custom cell animation. https://gist.github.com/floprr/1b7a58e4a18449d962bd

User · Answer

The way to approach this is to tell the tableView to remove and add rows and sections with the  insertRowsAtIndexPaths withRowAnimation    deleteRowsAtIndexPaths withRowAnimation    insertSections withRowAnimation  and  deleteSections withRowAnimation   methods of UITableView     When you call these methods  the table will animate in out the items you requested  then call reloadData on itself so you can update the state after this animation  This part is important - if you animate away everything but don t change the data returned by the table s dataSource  the rows will appear again after the animation completes    So  your application flow would be    self setTableIsInSecondState YES     myTable deleteSections  NSIndexSet indexSetWithIndex 0  withRowAnimation YES     As long as your table s dataSource methods return the correct new set of sections and rows by checking  self tableIsInSecondState   or whatever   this will achieve the effect you re looking for

User · Answer

In my case  I wanted to add 10 more rows into the tableview  for a  show more results  type of functionality  and I did the following     NSInteger tempNumber   self numberOfRows    self numberOfRows    10    NSMutableArray  arrayOfIndexPaths     NSMutableArray alloc  init     for  NSInteger i   tempNumber  i  lt  self numberOfRows  i           arrayOfIndexPaths addObject  NSIndexPath indexPathForRow i inSection 0           self tableView beginUpdates      self tableView insertRowsAtIndexPaths arrayOfIndexPaths withRowAnimation UITableViewRowAnimationTop      self tableView endUpdates     In most cases  instead of  self numberOfRows   you would usually use the count of the array of objects for the tableview  So to make sure this solution works well for you   arrayOfIndexPaths  needs to be an accurate array of the index paths of the rows being inserted  If the row exists for any of this index paths  the code might crash  so you should use the method  reloadRowsAtIndexPaths withRowAnimation   for those index pathds to avoid crashing

User · Answer

Actually  it s very simple     tableView reloadSections  NSIndexSet indexSetWithIndex 0  withRowAnimation UITableViewRowAnimationFade     From the documentation      Calling this method causes the table view to ask its data source for   new cells for the specified sections  The table view animates the   insertion of new cells in as it animates the old cells out

User · Answer

For Swift 4  tableView reloadSections  0   with  UITableView RowAnimation fade

User · Answer

Swift 4 version for  dmarnel answer   tableView reloadSections IndexSet integer  0   with   automatic

User · Answer

Animating without reloadData   in Swift can be done like this  as of version 2 2    tableview beginUpdates   var indexPathsToDeleteForAnimation   NSIndexPath       var numOfCellsToRemove   ArrayOfItemsToRemove    0     Do your work here while numOfCellsToRemove  gt  0             or here  if you need to add remove the same amount of objects to from somewhere     indexPathsToDeleteForAnimation append NSIndexPath forRow  selectedCellIndex numOfCellsToRemove  inSection  0       numOfCellsToRemove -  1   tableview deleteRowsAtIndexPaths indexPathsToDeleteForAnimation  withRowAnimation  UITableViewRowAnimation Right  tableview endUpdates     in case you need to call reloadData   after the animation ends  you can embrace the changes in CATransaction like this   CATransaction begin   CATransaction setCompletionBlock     in self tableview reloadData      tableview beginUpdates   var indexPathsToDeleteForAnimation   NSIndexPath       var numOfCellsToRemove   ArrayOfItemsToRemove count    0     Do your work here while numOfCellsToRemove  gt  0              or here  if you need to add remove the same amount of objects to from somewhere      indexPathsToDeleteForAnimation append NSIndexPath forRow  selectedCellIndex numOfCellsToRemove  inSection  0        numOfCellsToRemove -  1   tableview deleteRowsAtIndexPaths indexPathsToDeleteForAnimation  withRowAnimation  UITableViewRowAnimation Right  tableview endUpdates   CATransaction commit     The logic is shown for the case when you delete rows  but the same idea works also for adding rows  You can also change animation to UITableViewRowAnimation Left to make it neat  or choose from the list of other available animations

User · Answer

UITableView has a field called   indexPathsForVisibleRows  that you can use to animate the visible rows using the  reloadItemsAtIndexPaths  method      guard let indexPaths   tableView indexPathsForVisibleRows     else   return            self tableView layoutIfNeeded       self tableView reloadItemsAtIndexPaths indexPaths  animationStyle   automatic

User · Answer

The way to approach this is to tell the tableView to remove and add rows and sections with the  insertRowsAtIndexPaths withRowAnimation    deleteRowsAtIndexPaths withRowAnimation    insertSections withRowAnimation  and  deleteSections withRowAnimation   methods of UITableView     When you call these methods  the table will animate in out the items you requested  then call reloadData on itself so you can update the state after this animation  This part is important - if you animate away everything but don t change the data returned by the table s dataSource  the rows will appear again after the animation completes    So  your application flow would be    self setTableIsInSecondState YES     myTable deleteSections  NSIndexSet indexSetWithIndex 0  withRowAnimation YES     As long as your table s dataSource methods return the correct new set of sections and rows by checking  self tableIsInSecondState   or whatever   this will achieve the effect you re looking for

User · Answer

Swift Implementation   let range   NSMakeRange 0  self tableView  numberOfSections    let indexSet   NSIndexSet indexesInRange  range  self tableView  reloadSections indexSet  withRowAnimation  UITableViewRowAnimation Automatic

User · Answer

The way to approach this is to tell the tableView to remove and add rows and sections with the  insertRowsAtIndexPaths withRowAnimation    deleteRowsAtIndexPaths withRowAnimation    insertSections withRowAnimation  and  deleteSections withRowAnimation   methods of UITableView     When you call these methods  the table will animate in out the items you requested  then call reloadData on itself so you can update the state after this animation  This part is important - if you animate away everything but don t change the data returned by the table s dataSource  the rows will appear again after the animation completes    So  your application flow would be    self setTableIsInSecondState YES     myTable deleteSections  NSIndexSet indexSetWithIndex 0  withRowAnimation YES     As long as your table s dataSource methods return the correct new set of sections and rows by checking  self tableIsInSecondState   or whatever   this will achieve the effect you re looking for

User · Answer

All of these answers assume that you are using a UITableView with only 1 section   To accurately handle situations where you have more than 1 section use   NSRange range   NSMakeRange 0  myTableView numberOfSections   NSIndexSet  indexSet    NSIndexSet indexSetWithIndexesInRange range    myTableView reloadSections indexSet withRowAnimation UITableViewRowAnimationAutomatic      Note  you should make sure that you have more than 0 sections    Another thing to note is that you may run into a NSInternalInconsistencyException if you attempt to simultaneously update your data source with this code   If this is the case  you can use logic similar to this   int sectionNumber   0    Note that your section may be different  int nextIndex    currentItems count     starting index of newly added items   myTableView beginUpdates    for  NSObject  item in itemsToAdd          Add the item to the data source      currentItems addObject item          Add the item to the table view     NSIndexPath  path    NSIndexPath indexPathForRow nextIndex   inSection sectionNumber        myTableView insertRowsAtIndexPaths  NSArray arrayWithObject path  withRowAnimation UITableViewRowAnimationAutomatic       myTableView endUpdates

User · Answer

Actually  it s very simple     tableView reloadSections  NSIndexSet indexSetWithIndex 0  withRowAnimation UITableViewRowAnimationFade     From the documentation      Calling this method causes the table view to ask its data source for   new cells for the specified sections  The table view animates the   insertion of new cells in as it animates the old cells out

User · Answer

CATransition  animation    CATransition animation   animation duration    3   animation setType kCATransitionPush    animation setSubtype kCATransitionFromLeft    animation setTimingFunction  CAMediaTimingFunction functionWithName kCAMediaTimingFunctionEaseInEaseOut     animation setDuration  3       elementTableView layer  addAnimation animation forKey   UITableViewReloadDataAnimationKey      tableView reloadData

User · Answer

I can t comment on the top answer  but a swift implementation would be    self tableView reloadSections  0   with  UITableViewRowAnimation fade    you could include as many sections as you want to update in the first argument for reloadSections   Other animations available from the docs  https   developer apple com reference uikit uitableviewrowanimation  fade The inserted or deleted row or rows fade into or out of the table view   right The inserted row or rows slide in from the right  the deleted row or rows slide out to the right   left The inserted row or rows slide in from the left  the deleted row or rows slide out to the left   top The inserted row or rows slide in from the top  the deleted row or rows slide out toward the top   bottom The inserted row or rows slide in from the bottom  the deleted row or rows slide out toward the bottom   case none The inserted or deleted rows use the default animations   middle The table view attempts to keep the old and new cells centered in the space they did or will occupy  Available in iPhone 3 2   automatic The table view chooses an appropriate animation style for you   Introduced in iOS 5 0

User · Answer

To reload all sections  not just one with custom duration   User duration parameter of UIView animate to set custom duration   UIView animate withDuration  0 4  animations     weak self  in     guard let  self    self else   return       let indexSet   IndexSet integersIn  0   lt self tableView numberOfSections      self tableView reloadSections indexSet  with  UITableView RowAnimation fade

[cocoa-touch] Have a reloadData for a UITableView animate when changing

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