UITableViewCell animate improperly at the very first time - ios

Question

I'm actually going to DELETE a cell on aTableView when a cell on bTableView is deselected. And also, I'm using UIViewController instead of UITableViewController just because there'r lots of things on my app, and for sure, I've adopted UITableViewDelegate, UITableViewDataSource.
- (void)tableView:(UITableView *)tableView didDeselectRowAtIndexPath:(NSIndexPath *)indexPath
if (tableView == bTableView) { ......
MyCustomCell *cell = (MyCustomCell *)[aTableView cellForRowAtIndexPath:indexPath];
[convertResultTableView beginUpdates];
// some data updates stuff..
[UIView beginAnimations:#"quitRotation" context:NULL];
CATransform3D rotation;
rotation = CATransform3DMakeRotation((70.0 * M_PI) / 180, 0.0, 0.0, 1.0);
cell.layer.transform = rotation;
cell.layer.anchorPoint = CGPointMake(-1, 0.5);
cell.alpha = 0;
cell.layer.shadowOffset = CGSizeMake(0, 0);
[UIView commitAnimations];
[convertResultTableView endUpdates];
The problem is the cells animate proper only when it animate at the second, third, forth.. time but NOT the first time. (which means it appear, disappear, appear and disappear <- this time)
It still do some animation but it is just not as what I expected, and there'r a lot different between that WRONG animation and the proper animation.
Any ideas?

Answer 1

You should try to do this animation in method cellForRowAtIndexPath
Something like this:
- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath {
self.selectedIndexPath = indexPath;
[tableView reloadData];
}
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath {
MyCustomCell *cell = (MyCustomCell *)[tableView cellForRowAtIndexPath:indexPath];
if([self.selectedIndexPath isEqual: indexPath]) {
// do the animation
}
}

Answer 2

Really a silly mistake!
Here's my mistake:
My aTableView will do some animation when first show, but my code have some silly mistake so that only my first row of cell of the aTableView do the animate, therefore, cell.layer.position will be different. However, after it disappear and appear again, the cell.layer.position all go to the right place because the code is right, so it works when it's 2th, 3rd... time.
How I found the mistake: I just do NSLog(...); to log basically all the property of cell.layer because I'm really new to CoreAnimation, fortunately, my first try is cell.layer.position, and I found the mistake immediately.