didDeselectRowAtIndexPath is not called when the checkbox is checked aleady - ios

Question

Im using UITableView with checkboxes. In my cellForRowAtIndexPath method, I have set selected few cells as follows,
UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:cellIdentifier];
if(tableView == self.sideBarTbl){
cell.textLabel.text = [titleArray objectAtIndex:indexPath.row];
cell.tag = indexPath.row;
if(indexPath.row == 0){
[cell setSelected:true];
}else if(indexPath.row == 1){
[cell setSelected:true];
}else {
[cell setSelected:false];
}
}
In short, if the row is 0,1 then Im checking the checkboxes of the UITableView.
when the user clicks the row 0 or row 1, it should call didDeselectRowAtIndexPath since row 0 and row 1 checkmarks are already checked. But, it is always calling the didSelectRowAtIndexPath. no matter if the checkbox is checked or not, it always calls the didSelectRowAtIndexPath. How can I let it call didDeselectRowAtIndexPath when the checkbox is checked and call didSelectRowAtIndexPath when the checkbox is not checked?

Answer 1

didDeselectRowAtIndexPath method will only be called for cells which has been touched to select before. It's not related to the cell's selected property. If you want to do something for deselected cells, just record the selection manually in NSMutableArray with didSelectRowAtIndexPath method. Forget the didDeselectRowAtIndexPath. For reference: UITableView cell on double click should go to previous state
And an Objective-C example:
#interface SomeViewController : UIViewController<UITableViewDelegate> {
NSMutableArray *selectedIndexPaths;
}
#implementation SomeViewController
//......
- (void)viewDidLoad {
[super viewDidLoad];
selectedIndexPaths = [NSMutableArray array];
}
- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath {
if ([selectedIndexPaths containsObject:indexPath]) {
[selectedIndexPaths removeObject:indexPath];
//Do something when deselecting.
}
else{
[selectedIndexPaths addObject:indexPath];
//Do something when selecting.
}
}
//......
#end
If the selection is single and exclusive, like a radiobox, just use single variable NSIndexPath *selectedIndexPath; to record selection in didSelectRowAtIndexPath, after handling the deselecting process for previous selected cell.

Answer 2

Use the following code in your cellForRowAtIndexPath instead of [cell setSelected:true];
[tableView selectRowAtIndexPath:indexPath animated:YES scrollPosition:UITableViewScrollPositionBottom];`
Use the following code when the user wants to deselect. Use it in your didDeselectRowAtIndexPath
[tableView deselectRowAtIndexPath:indexPath animated:YES];
Finally, you can get the selected indexes as follows,
-(void) getSelectedIndices
{
NSArray *indexPathArray = [tableView indexPathsForSelectedRows];
for(NSIndexPath *index in indexPathArray)
{
NSLog(#"Index: %ld",(long)index.row);
}
}
Revert back in case if you have any queries