UICollectionView Vertical showing half the cell in the end - ios

Question

i have collectionView. it shows cell in vertically.
in the start the collectionView looks like this
start of the collectionview
at the end it looks like this
end of collectionView
so it basically doesnt show up the whole cell in the end
the code for collection class is
#import "ViewController.h"
#interface ViewController ()
#property (weak, nonatomic) IBOutlet UICollectionView *collectionView;
#end
#implementation ViewController
- (void)viewDidLoad {
[super viewDidLoad];
// Do any additional setup after loading the view, typically from a nib.
}
- (void)didReceiveMemoryWarning {
[super didReceiveMemoryWarning];
// Dispose of any resources that can be recreated.
}
#pragma mark - CollectionView Datasource
- (NSInteger)numberOfSectionsInCollectionView:(UICollectionView *)collectionView{
return 1;
}
- (NSInteger)collectionView:(UICollectionView *)collectionView numberOfItemsInSection:(NSInteger)section{
return 9;
}
- (UICollectionViewCell *)collectionView:(UICollectionView *)collectionView cellForItemAtIndexPath:(NSIndexPath *)indexPath{
ViewControllerCollectionViewCell *cell = [collectionView dequeueReusableCellWithReuseIdentifier:#"Cell" forIndexPath:indexPath];
return cell;
}
#end

Answer 1

You have to specify the cell size in your storyboard.

Answer 2

-(CGSize)collectionView:(UICollectionView *)collectionView layout:(UICollectionViewLayout *)collectionViewLayout sizeForItemAtIndexPath:(NSIndexPath *)indexPath{
float width = 100; //change to your needed width
float height = 100; //change to your needed height
return CGSizeMake(width, height);
}

Answer 3

try this code it will help you
- (NSInteger)collectionView:(UICollectionView *)collectionView numberOfItemsInSection:(NSInteger)section
{
return 9;
}
- (UICollectionViewCell *)collectionView:(UICollectionView *)collectionView cellForItemAtIndexPath:(NSIndexPath *)indexPath
{
static NSString *identifier = #"cellIdentifier";
UICollectionViewCell *cell=[collectionView dequeueReusableCellWithReuseIdentifier:identifier forIndexPath:indexPath];
return cell;
}
and change identifier name in attribute inspector as shown in image: