Single selection UITableView overlay cell - ios

Question

I'm trying to make custom selection of UITableView cells. To do this I created UIView above my cell and it appear/disappear on touching now. But the problem is that when I press on cell selection appears. If then I select any other row it will be selected too! But it must not. Every previous cell must be deselected but I do only single selection for my UITableView. I'll glad for any help.
Here is my code :
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath: (NSIndexPath *)indexPath
{
static NSString *CellIdentifier = #"userDataCell";
AVMThemeCell *cell = [self.userContentTable dequeueReusableCellWithIdentifier:CellIdentifier];
// Configure the cell...
if (cell == nil) {
cell = [[AVMThemeCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:CellIdentifier];
}
AVMDataStore *oneItem = [userContentArray objectAtIndex:indexPath.row];
oneItem = [userContentArray objectAtIndex:indexPath.row];
[cell setGenre:oneItem];
cell.imgView.image = [UIImage imageNamed:imgThemesArray[indexPath.row]];
//save cell state!
NSNumber *rowNsNum = [NSNumber numberWithUnsignedInt:(unsigned int)indexPath.row];
if ([selectedCellsArray containsObject:[NSString stringWithFormat:#"%#",rowNsNum]] )
{
NSLog(#"selectedCellsArray %#",selectedCellsArray);
cell.selectedBG.hidden=NO;
[cell setSelected:NO animated:YES];
}
else
{
cell.selectedBG.hidden=YES;
}
return cell;
}
- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath{
#try{
// TODO: Select Item
if (shareEnabled) {
[selectedCellsArray removeAllObjects];
AVMThemeCell *collectionCell = (AVMThemeCell*)[tableView cellForRowAtIndexPath:indexPath];
NSNumber *rowNsNum = [NSNumber numberWithUnsignedInt:(unsigned int)indexPath.row];
if ( ![selectedCellsArray containsObject:[NSString stringWithFormat:#"%#",rowNsNum]] )
{
[selectedCellsArray addObject:[NSString stringWithFormat:#"%ld",(long)indexPath.row]];
collectionCell.selectedBG.hidden = NO;
[collectionCell setSelected:NO animated:YES];
// NSLog(#"view is %#",collectionCell.selectedBG);
NSLog(#"selected view is hidden = %hhd",collectionCell.hidden);
NSLog(#"selected in didselect %d",(int)indexPath.row);
}
else {
[selectedCellsArray removeObject:[NSString stringWithFormat:#"%ld",(long)indexPath.row]];
collectionCell.selectedBG.hidden = YES;
NSLog(#"DEselected in didDEselect");
}
}
} #catch (NSException *e){
NSLog(#"Exception! %#",e);
}
}

Answer 1

A more simple approach to do this is to use NSIndexPath.
Create NSIndexPath variable to track last selected cell.
#property (nonatomic, strong) NSIndexPath *selectedIndexPath;
Initialisation variable in viewDidLoad() method:
self.selectedIndexPath = [NSIndexPath indexPathForRow:-1 inSection:-1];
Observe value -1 for row and -1 for section in above line which will intialize indexPath with no row selection in tableView.
Now, UITableView datasource methods will be like below:
In cellForRowAtIndexPath method put a condition to check current indexPath is selected or not?
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath {
// . . .
// Change background color of selected cell
if (self.selectedIndexPath == indexPath) {
[cell setBackgroundColor:[UIColor orangeColor]];
} else {
[cell setBackgroundColor:[UIColor clearColor]];
}
// . . .
}
Update selected index path in didSelectRowAtIndexPath method:
- (void) tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath {
// . . .
AVMThemeCell *previousCell = (AVMThemeCell *)[tableView cellForRowAtIndexPath:self.selectedIndexPath];
previousCell.backgroundColor = [UIColor clearColor];
self.selectedIndexPath = indexPath;
AVMThemeCell *selectedCell = AVMThemeCell *[tableView cellForRowAtIndexPath:self.selectedIndexPath];
selectedCell.backgroundColor = [UIColor orangeColor];
// . . .
}