UITableViewCell - unrecognized selector sent to instance - ios

Question

I'm trying to implement a right swipe to the left but is giving this error :
Terminating app due to uncaught exception
'NSInvalidArgumentException', reason: '- [UITableViewCell
setDelegate]: unrecognized selector sent to instance 0x7fbadb85d710'
this error of the lines:
cell.delegate = self;
cell.allowsMultipleSwipe = allowMultipleSwipe;
cell.rightSwipeSettings.transition = data.transition;
cell.rightExpansion.buttonIndex = data.rightExpandableIndex;
cell.rightExpansion.fillOnTrigger = YES;
cell.rightButtons = [self createRightButtons:data.rightButtonsCount];
my code:
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
MGSwipeTableCell *cell ;
static NSString * reuseIdentifier = #"listAlbuns";
cell = [self.tblAlbum dequeueReusableCellWithIdentifier:reuseIdentifier];
if (!cell) {
cell = [[MGSwipeTableCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:reuseIdentifier];
}
NSString *sectionTitle = [albumSectionTitles objectAtIndex:indexPath.section];
NSMutableDictionary *sectionAlbuns = [albuns objectForKey:sectionTitle];
NSString *title = [sectionAlbuns objectForKey: [NSString stringWithFormat:#"%i", indexPath.row]];
NSMutableDictionary *album = [baseController getCurrentItemByTitle: albunsBD :title];
TestData *data = [tests objectAtIndex:indexPath.row];
NSInteger ID = [album objectForKey: #"1"];
cell.textLabel.text = [album objectForKey: #"2"];
cell.detailTextLabel.text = [[albumDAO selectArtistByAlbumID: ID] uppercaseString];
cell.imageView.image = [UIImage imageNamed: #"icones-categorias-album"];
cell.imageView.image = [albumDAO getThumb: ID];
cell.tag = [album objectForKey: #"1"];
cell.delegate = self;
cell.allowsMultipleSwipe = allowMultipleSwipe;
cell.rightSwipeSettings.transition = data.transition;
cell.rightExpansion.buttonIndex = data.rightExpandableIndex;
cell.rightExpansion.fillOnTrigger = YES;
cell.rightButtons = [self createRightButtons:data.rightButtonsCount];
return cell;
}
anyone have any idea what can be?

Answer 1

Since you are trying to use a UITableViewCell subclass, MGSwipeTableViewCell, you must ensure the cell you are getting back from dequeueReusableCellWithIdentifier returns an MGSwipeTableViewCell.
Firstly, you can remove the if (!cell) { ... } block, as dequeueReusableCellWithIdentifier should return a UITableViewCell if you have the identifier set in a .xib or on the storyboard. Having the extra block can make this code harder to debug if the cell doesn't have a reuse identifier on the storyboard or .xib.
Next, in your .xib or storyboard where the cell you are trying to dequeue exists, select the prototype UITableViewCell and look at the box named "Class" under the section "Custom Class". Change this to MGSwipeTableViewCell, as I suspect it is set to UITableViewCell. This should fix the problem. Here is the area in Xcode I am talking about:
You should be able to set cell.delegate and other MGSwipeTableViewCell properties after you dequeue a real MGSwipeTableViewCell.