How to access IBOutlets of a UICollectionViewCell from a UIViewController? - ios

Question

I implemented a UICollectionView inside a UIViewController. The header cell is created in a separate.xib file and it is implemented in a separate .h and .m files with the IBOutlets and IBActions. The rest of the cells are implemented in the same UIVIewController (The reason is because I added this Parallax effect).
I would like to modify the info of the IBoutlets (labels and buttons) that are in the header cell (CSCellUser.h) from the viewcontroller (RankingViewController) which containts the collectionview, how can I do this?
Cell: CSCellUser.h
#interface CSCellUser : UICollectionViewCell
#property IBOutlet UILabel *myScoreValueLabel;
#property IBOutlet UILabel *myRankingValueLabel;
-(IBAction) sendButtonTouchHandler:(id) sender;
#end
UIViewController: RankingViewController.h
#interface RankingViewController : CommonViewController <UICollectionViewDelegate, UICollectionViewDataSource> {
}
#property IBOutlet UICollectionView *collectionView1;
#end
UIViewController:RankingViewController.m
- (void)viewDidLoad
{
[super viewDidLoad];
//Parallax Effect, UICollectionView
// Locate the layout
CSStickyHeaderFlowLayout *layout = (id)self.collectionView1.collectionViewLayout;
if ([layout isKindOfClass:[CSStickyHeaderFlowLayout class]]) {
layout.parallaxHeaderReferenceSize = CGSizeMake(320, 220);
layout.parallaxHeaderAlwaysOnTop = YES;
}
// Locate the nib and register it to your collection view
UINib *headerNib = [UINib nibWithNibName:#"CSHeaderRanking" bundle:nil];
[self.collectionView1 registerNib:headerNib
forSupplementaryViewOfKind:CSStickyHeaderParallaxHeader
withReuseIdentifier:#"TopViewCell"];
//get the position of the user and the ranking (this should update the IBOutlets in the CSCellUser.h)
[self getUserRanking];
//get the ranking of users (this updates each cell of the ranking in cellForItemAtIndexPath)
[self getRanking];
}
- (NSInteger) numberOfSectionsInCollectionView:
(UICollectionView *)collectionView
{
return 1;
}
- (NSInteger) collectionView:(UICollectionView *)collectionView
numberOfItemsInSection:(NSInteger)section
{
return [ranking count];
}
- (UICollectionViewCell *) collectionView:(UICollectionView *)collectionView
cellForItemAtIndexPath:(NSIndexPath *)indexPath
{
UICollectionViewCell *cell = [collectionView dequeueReusableCellWithReuseIdentifier: #"UsersCell" forIndexPath:indexPath];
if ([ranking count] > 0)
{
UserRanking *user = [ranking objectAtIndex:indexPath.row]; //Fill the cell
UILabel *usernameLabel = (UILabel *)[cell viewWithTag:101];
usernameLabel.text = user.username;
UILabel *scoreLabel = (UILabel *)[cell viewWithTag:102];
scoreLabel.text = [NSString stringWithFormat:#"%d", user.score];
UILabel *gamesLabel = (UILabel *)[cell viewWithTag:103];
gamesLabel.text =[NSString stringWithFormat:#"%d", user.tries];
}
return cell;
}
//Header
- (UICollectionReusableView *)collectionView:(UICollectionView *)collectionView viewForSupplementaryElementOfKind:(NSString *)kind atIndexPath:(NSIndexPath *)indexPath
{
UICollectionReusableView *reusableview = nil;
if ([kind isEqualToString:CSStickyHeaderParallaxHeader]) {
reusableview = [collectionView dequeueReusableSupplementaryViewOfKind:kind withReuseIdentifier:#"TopViewCell" forIndexPath:indexPath];
}
return reusableview;
}
EDIT:
This is how I am trying to change one of the labels from cellForRowAtIndexPath but it does not change.
CSHeaderRanking *topcell = [collectionView dequeueReusableCellWithReuseIdentifier: #"TopCell" forIndexPath:indexPath];
topcell.myScoreValueLabel.text = #"32";

Answer 1

If TopCell is mapped in its xib, all you have to do is refer to its properties. If you want to customize, you'll need to over-ride the CCSticky... and refer to it in your xib and this class.