Working with collectionView and collectionViewCells - objective-c

Question

 It's the first time i'm working with UICollectionView and UICollectionViewCells. I am trying to make a simple view. The problems i' facing are: reloading collection view data, displaying text (from array) into cell labels..
code is here..
please help as much as you can.. <3 (app crashes when i don't add subview)
#import "MainCollectionViewController.h"
#import "MainCollectionViewCell.h"
#interface MainCollectionViewController () <UICollectionViewDataSource, UICollectionViewDelegate, UICollectionViewDelegateFlowLayout>
{
UICollectionView *colView;
}
#end
#implementation MainCollectionViewController
static NSString * const reuseIdentifier = #"Cell";
- (void)viewDidLoad {
[super viewDidLoad];
// [self.collectionView registerClass:[UICollectionViewCell class] forCellWithReuseIdentifier:reuseIdentifier];
self.actressArray = [NSMutableArray arrayWithObjects:#"John", #"Patrick", #"Jack", #"Clara", #"Nicol", #"Amanda", #"Nick", #"Bob", #"Jeff", #"Jerremy", #"Gloria", #"Bred", #"Seth", #"Peter", #"Lous", nil];
self.view = [[UIView alloc] initWithFrame:[[UIScreen mainScreen] bounds]];
UICollectionViewFlowLayout *layout=[[UICollectionViewFlowLayout alloc] init];
colView=[[UICollectionView alloc] initWithFrame:self.view.frame collectionViewLayout:layout];
[colView setDataSource:self]; //დელეგატების კოდით ჩართვა
[colView setDelegate:self];
[colView registerClass:[UICollectionViewCell class] forCellWithReuseIdentifier:reuseIdentifier];
[colView setBackgroundColor:[UIColor grayColor]]; //ვიუს ბექგრაუნდის ფერი
UICollectionViewFlowLayout *flowLayout = [[UICollectionViewFlowLayout alloc] init];
[flowLayout setScrollDirection:UICollectionViewScrollDirectionVertical];
[self.collectionView setCollectionViewLayout:flowLayout];
[self.view addSubview:colView]; //ვიუზე ჩვენ მიერ გამზადებული ვიუს დაგდება
[self.collectionView registerClass:[MainCollectionViewCell class] forCellWithReuseIdentifier: reuseIdentifier];
////[self.collectionView reloadData];
}
- (void)didReceiveMemoryWarning {
[super didReceiveMemoryWarning];
// Dispose of any resources that can be recreated.
}
//// In a storyboard-based application, you will often want to do a little preparation before navigation
//- (void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender //{
//}
- (NSInteger)numberOfSectionsInCollectionView:(UICollectionView *)collectionView {
return _actressArray.count;
}
- (NSInteger)collectionView:(UICollectionView *)collectionView numberOfItemsInSection:(NSInteger)section {
return 3;
}
- (UICollectionViewCell *)collectionView:(UICollectionView *)collectionView cellForItemAtIndexPath:(NSIndexPath *)indexPath {
MainCollectionViewCell *cell = (MainCollectionViewCell *)[collectionView dequeueReusableCellWithReuseIdentifier:reuseIdentifier forIndexPath:indexPath];
NSString *actressStr = [_actressArray objectAtIndex:indexPath.row];
cell.actressLabel.text = actressStr;
//[self.collectionView reloadData];
//[cell.contentView addSubview: ];
return cell;
}

Answer 1

1 Please Check You Outlets Connection Once again :-
2 And What's Error ???

Answer 2

here is updated one. reload data doesn't works
#import "MainCollectionViewController.h"
#import "MainCollectionViewCell.h"
#interface MainCollectionViewController () <UICollectionViewDataSource, UICollectionViewDelegate, UICollectionViewDelegateFlowLayout>
{
UICollectionView *colView;
}
#end
#implementation MainCollectionViewController
static NSString * const reuseIdentifier = #"Cell";
- (void)viewDidLoad {
[super viewDidLoad];
// [self.collectionView registerClass:[UICollectionViewCell class] forCellWithReuseIdentifier:reuseIdentifier];
self.actressArray = [NSMutableArray arrayWithObjects:#"John", #"Patrick", #"Jack", #"Clara", #"Nicol", #"Amanda", #"Nick", #"Bob", #"Jeff", #"Jerremy", #"Gloria", #"Bred", #"Seth", #"Peter", #"Lous", nil];
self.view = [[UIView alloc] initWithFrame:[[UIScreen mainScreen] bounds]];
UICollectionViewFlowLayout *layout=[[UICollectionViewFlowLayout alloc] init];
colView=[[UICollectionView alloc] initWithFrame:self.view.frame collectionViewLayout:layout];
[colView setDataSource:self]; //დელეგატების კოდით ჩართვა
[colView setDelegate:self];
[colView registerClass:[UICollectionViewCell class] forCellWithReuseIdentifier:reuseIdentifier];
[colView setBackgroundColor:[UIColor grayColor]]; //ვიუს ბექგრაუნდის ფერი
UICollectionViewFlowLayout *flowLayout = [[UICollectionViewFlowLayout alloc] init];
[flowLayout setScrollDirection:UICollectionViewScrollDirectionVertical];
[self.collectionView setCollectionViewLayout:flowLayout];
[self.view addSubview:colView]; //ვიუზე ჩვენ მიერ გამზადებული ვიუს დაგდება
[self.collectionView registerClass:[MainCollectionViewCell class] forCellWithReuseIdentifier: reuseIdentifier];
[colView reloadData];
}
//// In a storyboard-based application, you will often want to do a little preparation before navigation
//- (void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender {
//}
- (NSInteger)numberOfSectionsInCollectionView:(UICollectionView *)collectionView {
return 2;
}
- (NSInteger)collectionView:(UICollectionView *)collectionView numberOfItemsInSection:(NSInteger)section {
return _actressArray.count;
}
- (UICollectionViewCell *)collectionView:(UICollectionView *)collectionView cellForItemAtIndexPath:(NSIndexPath *)indexPath {
MainCollectionViewCell *cell = (MainCollectionViewCell *)[collectionView dequeueReusableCellWithReuseIdentifier:reuseIdentifier forIndexPath:indexPath];
cell.backgroundColor = [UIColor whiteColor];
cell.layer.cornerRadius = 10;
cell.layer.borderWidth = 2.0;
cell.layer.borderColor = [[UIColor lightGrayColor] CGColor];
UILabel *testLabel = [[UILabel alloc] initWithFrame:CGRectMake(10, 0, cell.bounds.size.width -20 , cell.bounds.size.height)];
testLabel.text = _actressArray[indexPath.row];
testLabel.font = [UIFont fontWithName:#"Helvetica" size:12];
testLabel.textAlignment = NSTextAlignmentCenter;
testLabel.lineBreakMode = NSLineBreakByWordWrapping;
testLabel.numberOfLines = 0;
[cell.contentView addSubview:testLabel];
return cell;
}
- (CGSize)collectionView:(UICollectionView *)collectionView layout:(UICollectionViewLayout *)collectionViewLayout sizeForItemAtIndexPath:(NSIndexPath *)indexPath
{
return CGSizeMake(collectionView.frame.size.width/3.2 , 100);
} //ხაზზე სამისთვის