uitableview cell delete, custom animation - ios

Question

i am trying to create a custom animation for the deletion of table rows by overriding the deleteRowsAtIndexPaths method. i created the custom insert animation successfully and tried to reverse the animation for the deletion part but i get some errors: Assertion failure in -[UITableView _endCellAnimationsWithContext:]
and
NSInternalInconsistencyException', reason: 'Invalid update: invalid number of rows in section 0.(rows after update must be equal to rows before the update).
If i don't override the deleteRows method and use tableView's default delete method, everything works fine, but not with my own method.
Here is the overriden method written in my tableViewController class:
- (void)insertRowsAtIndexPaths:(NSArray *)indexPaths
withRowAnimation:(UITableViewRowAnimation)animation
{
[[super tableView] insertRowsAtIndexPaths:indexPaths withRowAnimation:UITableViewRowAnimationNone];
[self.tableView endUpdates]; // Populates UITableView with data
[self.tableView beginUpdates];
for (NSIndexPath *indexPath in indexPaths) {
__block UITableViewCell *cell = [[super tableView] cellForRowAtIndexPath:indexPath];
if (cell) { // If indexPath isn't visible we'll get nil here
// Custom animation
CGRect frame = cell.frame;
frame.origin.x = cell.frame.size.width;
cell.frame = frame;
frame.origin.x = 0;
void (^animationsBlock)() = ^{
cell.frame = frame;
};
if ([[UIView class] respondsToSelector:
#selector(animateWithDuration:delay:usingSpringWithDamping:
initialSpringVelocity:options:animations:completion:)]) {
[UIView animateWithDuration:0.9
delay:0
usingSpringWithDamping:0.5
initialSpringVelocity:0
options:0
animations:animationsBlock
completion:NULL];
} else {
[UIView animateWithDuration:0.3
delay:0
options:UIViewAnimationOptionCurveEaseIn
animations:animationsBlock
completion:NULL];
}
}
}
}
deleteRowsAtIndexPathsMethod:
- (void)deleteRowsAtIndexPaths:(NSArray *)indexPaths
withRowAnimation:(UITableViewRowAnimation)animation
{
[[super tableView] deleteRowsAtIndexPaths:indexPaths withRowAnimation:UITableViewRowAnimationNone];
[self.tableView endUpdates]; // Populates UITableView with data
[self.tableView beginUpdates];
for (NSIndexPath *indexPath in indexPaths) {
__block UITableViewCell *cell = [[super tableView] cellForRowAtIndexPath:indexPath];
if (cell) { // If indexPath isn't visible we'll get nil here
// Custom animation
CGRect frame = cell.frame;
frame.origin.x = 0;
cell.frame = frame;
frame.origin.x = cell.frame.size.width;
void (^animationsBlock)() = ^{
cell.frame = frame;
};
if ([[UIView class] respondsToSelector:
#selector(animateWithDuration:delay:options:animations:completion:)]) {
[UIView animateWithDuration:0.9
delay:0
options:UIViewAnimationOptionCurveEaseIn
animations:animationsBlock
completion:NULL];
} else {
[UIView animateWithDuration:0.9
delay:0
options:UIViewAnimationCurveLinear
animations:animationsBlock
completion:NULL];
}
}
}
}
Edit: this code is inside a method, that runs whenever i modify a cell's object. I modify an object and save it to core data, then i retrieve all the updated objects using [self populateData], then i want to run the animations: delete the old cell and insert the new updated cell somewhere at the bottom of the tableView
[coreDataStack saveContext];
[self populateData];
[self.tableView beginUpdates];
int oldIndex = indexPath.row;
int newIndex = newIndexPath.row;
if(oldIndex<newIndex){
[self deleteRowsAtIndexPaths:#[indexPath] withRowAnimation:UITableViewRowAnimationRight];
[self insertRowsAtIndexPaths:#[newIndexPath] withRowAnimation:UITableViewRowAnimationTop];
} else if (oldIndex>newIndex) {
[self deleteRowsAtIndexPaths:#[indexPath] withRowAnimation:UITableViewRowAnimationRight];
[self insertRowsAtIndexPaths:#[newIndexPath] withRowAnimation:UITableViewRowAnimationBottom];
} else {
[self.tableView reloadRowsAtIndexPaths:#[newIndexPath] withRowAnimation:UITableViewRowAnimationMiddle];
}
[self.tableView endUpdates];