Flashing background on UITableview - ios

Question

I am trying to make quiz program. I used to UITableview for answers. How can i make to flashing on background when user click the correct answer? Is it possible?
Here is the some part of my project;
-(UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath{
cell = [tableView cellForRowAtIndexPath:[NSIndexPath indexPathForRow:indexPath.row inSection:0]];
//cell=[[UITableViewCell alloc] initWithStyle:UITableViewStylePlain reuseIdentifier:#"Cell"];
if (!cell) {
cell = [[UITableViewCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:#"Cell"];
[cell setSelectionStyle:UITableViewCellSelectionStyleNone];
}
NSNumber *rowNsNum = [NSNumber numberWithUnsignedInt:indexPath.row];
if ( [selectedCells containsObject:rowNsNum] )
{
//cell.accessoryType = UITableViewCellAccessoryCheckmark;
}
else
{
cell.accessoryType = UITableViewCellAccessoryNone;
}
NSString *text = [answers objectAtIndex:indexPath.row];
NSData *data = [text dataUsingEncoding: [NSString defaultCStringEncoding] ];
cell.textLabel.text = [[NSString alloc] initWithData:data encoding:NSUTF8StringEncoding ];
//cell.textLabel.text=[answers objectAtIndex:indexPath.row];
cell.textLabel.backgroundColor = [UIColor clearColor];
tableView.backgroundColor=[UIColor whiteColor];
cell.backgroundColor=[UIColor whiteColor];
[cell.textLabel setFont:[UIFont fontWithName:#"Helvatica" size:15]];
return cell;
}
-(void)tableView:(UITableView *)tableView willDisplayCell:(UITableViewCell *)cell forRowAtIndexPath:(NSIndexPath *)indexPath{
CGRect rect = cell.frame;
UIView * view = [[UIView alloc] init];
UIImageView *back = [[UIImageView alloc] initWithImage:[UIImage imageNamed:#"ListGray"] ];
BOOL selx;
if (answerType==2)
selx = [self isSelected:indexPath];
else
selx = [lastIndexPath isEqual:indexPath];
if (selx) {
back = [[UIImageView alloc] initWithImage:[UIImage imageNamed:#"aaaa.png"] ];
cell.textLabel.textColor = [UIColor whiteColor];
[view addSubview:back];
cell.backgroundView = view;
back.frame = CGRectMake(0, 12,rect.size.width,rect.size.height-12);
} else {
cell.accessoryView = nil;
if (lastIndexPath != nil){
cell.textLabel.textColor = [UIColor blackColor];
[view addSubview:back];
cell.backgroundView = view;
back.frame = CGRectMake(0, 12,rect.size.width,rect.size.height-12);
back = nil;
}
}
[view addSubview:back];
cell.backgroundView = view;
back.frame = CGRectMake(0, 12,rect.size.width,rect.size.height-12);
}
-(void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath{
tableView.allowsSelection = NO;
[tableView deselectRowAtIndexPath:indexPath animated:YES];
NSNumber *rowNsNum = [NSNumber numberWithUnsignedInt:indexPath.row];
if (answerType==3) {
NSString *secilenAnswerID;
secilenAnswerID= [genelAnswersID valueForKey:[answers objectAtIndex:indexPath.row]];
for (int a=0; a<[answers count]; a++) {
cell = [tableView cellForRowAtIndexPath:[NSIndexPath indexPathForRow:a inSection:0]];
cell. accessoryType= UITableViewCellAccessoryNone;
[selectedCells removeObject:rowNsNum];
selectedCells=[[NSMutableArray alloc]init];
}
cell = [tableView cellForRowAtIndexPath:[NSIndexPath indexPathForRow:indexPath.row inSection:0]];
isRadioSelected=TRUE;
radioAnswer = [genelAnswersID valueForKey:[answers objectAtIndex:indexPath.row]];
[selectedCells addObject:rowNsNum];
lastIndexPath = indexPath;
[tableView reloadData];
}
}
Sorry for my bad english. Thank you for your interest.

Answer 1

You can add a background view into your UITableViewCell with a backgroundColor. Then in your tableView: didSelectRowAtIndexPath: you can animate the hidden or alpha with the animation APIs in UIView. When the animation finishes you can animate hidden to TRUE or alpha back to 0 to get the flash effect.

Answer 2

Here is my question's solution. I took advice from Stephen Johnson:)
[UIView animateWithDuration:0.1f delay:0 options:(UIViewAnimationOptionAutoreverse | UIViewAnimationOptionRepeat) animations:^{
[UIView setAnimationRepeatCount:3];
cell.alpha = 0;
} completion: ^(BOOL finished) {
cell.hidden = YES;
[UIView animateWithDuration:0.1 animations:^{
cell.alpha = 1;
} completion: ^(BOOL finished) {
cell.hidden = NO;
}];
}];