iOS Set UITableView Expanded Initially - ios

Question

I have a UITableView which has expandable custom cells. Multiple cells can be expanded. For that I have an array expandedArray in which I store the indexPath of all cells that are expanded. Initially all cells are collapsed. I want in initial start all cells to be expanded. This is my cellForRowAtIndexPath code :-
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath {
// VISITORS LISTS TV
NSUInteger count = 0;
VisitorsListsCell *vcell = (VisitorsListsCell *) [tableView dequeueReusableCellWithIdentifier:#"VisitorsListsCell"];
if (vcell == nil) {
NSArray *nib = [[NSBundle mainBundle] loadNibNamed:#"VisitorsListsCell" owner:self options:nil];
vcell = [nib objectAtIndex:0];
}
// Button - Round Corners
[vcell button].layer.cornerRadius = 5;
[vcell button].contentHorizontalAlignment = UIControlContentHorizontalAlignmentLeft;
NSString *text = [visistorsList objectAtIndex:indexPath.row];
// SET PROPERTIES OF CELL
// ....
if ([expandedArray containsObject:indexPath]) {
// Do expanded cell stuff
[vcell setButtonText:[visistorsList objectAtIndex:indexPath.row] withCount:(int)count isExpanded:YES];
[vcell.button setImage:[UIImage imageNamed:#"arrowup.png"] forState:UIControlStateNormal ];
} else {
[vcell setButtonText:[visistorsList objectAtIndex:indexPath.row] withCount:(int)count isExpanded:NO];
[vcell.button setImage:[UIImage imageNamed:#"arrowdown.png"] forState:UIControlStateNormal ];
}
[[vcell listsTableView] reloadData];
return vcell;
}
I want is when the page is loaded, all cells are expanded. I believe for that I need to add indexPath of each cell to expandedArray. But on initial run only, how do I add the indexPath ??? I can't find a way to implement it.
Is it possible, any clue. OR any other way to achieve the goal. Any help is highly appreciated. Thanks.

Answer 1

To add indexPath to your expanded array you should use code below. But much simpler way is to use the same methods that are used in -numberOfSections and numberOfRowsInSection:. Using tableView delegates is not a good way.
- (void)viewDidLoad {
self.expandedArray = [NSMutableArray new];
for (int itSection=0; itSection<[self.tableView numberOfSections]; itSection++) {
for (int itRow=0; itRow<[self.tableView numberOfRowsInSection:itSection]; itRow++) {
NSIndexPath *indexPath = [NSIndexPath indexPathForRow:itRow inSection:itSection];
[self.expandedArray addObject:indexPath];
}
}
}
Btw: the correct way to implement cell from xib:
- (void)viewDidLoad {
....
UINib *nib = [UINib nibWithNibName:NSStringFromClass([VisitorsListsCell class]) bundle:nil];
[self.tableView registerNib:nib forCellReuseIdentifier:#"VisitorsListsCell"];
}