Select All,Deselect All and select particular cell in custom table view - ios

Question

I have created a drop-down using table cell,where i am showing my data. My data is get display in drop down.Now I want all the cell should be selected initially. Also I want to deselect all cell, and individual cell.
(void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath
{
if ([tableView isEqual:expansionTableView]) {
forState:UIControlStateNormal];
if (indexPath.row == 0) {
if ([indexPath isEqual:self.selectIndex]) {
self.isOpen = NO;
[self didSelectCellRowFirstDo:NO nextDo:NO];
self.selectIndex = nil;
}else
{
if (!self.selectIndex) {
self.selectIndex = indexPath;
[self didSelectCellRowFirstDo:YES nextDo:NO];
}else
{
[self didSelectCellRowFirstDo:NO nextDo:YES];
}
}
}else
{
objectForKey:#"surveyName"];
NSMutableArray *list=[[NSMutableArray alloc]init];
NSMutableArray *idlist =[[NSMutableArray alloc]init];
for (int i=0; i<_arraySurveyName.count; i++) {
NSMutableDictionary *dict=[_arraySurveyName objectAtIndex:i];
NSString *surveyName=[dict valueForKey:#"SurveyName"];
NSString *surveyID =[dict valueForKey:#"SurveyId"];
[list addObject:surveyName];
[idlist addObject:surveyID];
}
NSString *item = [list objectAtIndex:indexPath.row-1];
NSNumber *item1= [idlist objectAtIndex:indexPath.row-1];
str = item1;
NSLog(#"%#",str);
[_btn_surveyName setTitle:item forState:UIControlStateNormal];
[expansionTableView setHidden:YES];
}
}
else if ([tableView isEqual:expansionTableViewQtn]){
NSString *selectedQuestion=[arrayOfQuestionDetail objectAtIndex:indexPath.section];
[expansionTableViewQtn setHidden:YES];
[_btn_showQuestn setTitle:selectedQuestion forState:UIControlStateNormal];
}
}
it's my code for "didSelect".How to do this.

Answer 1

You can use below methods to select and deselect the cells
- (void)selectRowAtIndexPath:(NSIndexPath *)indexPath animated:(BOOL)animated scrollPosition:(UITableViewScrollPosition)scrollPosition;
- (void)deselectRowAtIndexPath:(NSIndexPath *)indexPath animated:(BOOL)animated;
[tableView deselectRowAtIndexPath:indexPath animated:NO];//For deselecting
[tableView selectRowAtIndexPath:indexPath animated:NO scrollPosition:UITableViewScrollPositionNone];//For selecting