iOS - how do I specify the index path of every UICollectionViewCell?

Question

I'm trying to use a CollectionView as a nice layout for my navigation buttons. I have a big If....else statement but I'm getting the error:

Semantic Issue Property 'indexPath' not found on object of type 'UICollectionViewCell *'

Here is the code that is giving the error. There must be a better way to get the index paths for the cell.

- (void)collectionView:(UICollectionView *)collectionView didSelectItemAtIndexPath:(NSIndexPath *)indexPath
{

if (_navCell.indexPath = @"0 - 0")
{
    [self performSegueWithIdentifier:@"toPersonnel" sender:self];
}
else if (_navCell.indexPath = @"0 - 1")
{
    [self performSegueWithIdentifier:@"toEquipment" sender:self];
}
else if (_navCell.indexPath = @"0 - 2")
{
    [self performSegueWithIdentifier:@"toTasks" sender:self];
}
else if (_navCell.indexPath = @"0 - 3")
{
    [self performSegueWithIdentifier:@"toTriage" sender:self];
}
else if (_navCell.indexPath = @"0 - 4")
{
    [self performSegueWithIdentifier:@"toLogs" sender:self];
}
else if (_navCell.indexPath = @"0 - 5")
{
    [self performSegueWithIdentifier:@"toMapping" sender:self];
}
else if (_navCell.indexPath = @"0 - 6")
{
    [self performSegueWithIdentifier:@"toHeadsUp" sender:self];
}
else if (_navCell.indexPath = @"0 - 7")
{
    [self performSegueWithIdentifier:@"toMessenger" sender:self];
}
}

And the other code for my collection view:

@interface mainViewController ()
  @property (strong, nonatomic) IBOutlet UICollectionViewCell *navCell;
@end

the viewdidload:

- (void)viewDidLoad
{
[super viewDidLoad];
navItems = [[NSMutableArray alloc]init];
[navItems addObject:@"personnel"];
[navItems addObject:@"equipment"];
[navItems addObject:@"tasks"];
[navItems addObject:@"triage"];
[navItems addObject:@"logs"];
[navItems addObject:@"mapping"];
[navItems addObject:@"headsup"];
[navItems addObject:@"messenger"];
}

Collection view methods

-(NSInteger) numberOfSectionsInCollectionView:(UICollectionView *)collectionView {
return 1;
}

-(NSInteger) collectionView:(UICollectionView *)collectionView numberOfItemsInSection:(NSInteger)section {
return [navItems count];
}

-(UICollectionViewCell *)collectionView:(UICollectionView *)collectionView cellForItemAtIndexPath:(NSIndexPath *)indexPath {
UICollectionViewCell *cell = [collectionView dequeueReusableCellWithReuseIdentifier:@"Cell" forIndexPath:indexPath];
UIImageView *image = (UIImageView *)[cell viewWithTag:100];
image.image = [UIImage imageNamed:[navItems objectAtIndex:indexPath.row]];

return cell;
}

Could someone show the proper way to find the indexPath of the different cells so I can connect them to my segues?

Thanks

Answer 1

There are many things wrong with your didSelectRow... method.

1. The method has an indexPath parameter
2. Your check to compare the index path is all wrong
3. Use an array

Try this:

- (void)collectionView:(UICollectionView *)collectionView didSelectItemAtIndexPath:(NSIndexPath *)indexPath {
    NSString *segue = segues[indexPath.row];
    [self performSegueWithIdentifier:segue sender:self];
}

Add an instance variable for segues as NSArray *segues;.

Then in viewDidLoad you can initialize it:

segues = @[ @"toPersonnel", @"toEquipment", @"toTasks" /* and the rest */ ];