Error : "could not dequeue a view of kind" in Objective-C - ios

Question

I Created a UICollectionViewController in StoryBoard and set it's class to CollectionViewController1 and i have a ReuseIdentifier.
Here is my error :
Assertion failure in -[UICollectionView _dequeueReusableViewOfKind:withIdentifier:
forIndexPath:viewCategory:], /BuildRoot/Library/Caches/com.apple.xbs/Sources/UIKit
/UIKit-3600.8.1/UICollectionView.m:5115
Terminating app due to uncaught exception
'NSInternalInconsistencyException', reason: 'could not dequeue a view of kind:
UICollectionElementKindCell with identifier Cell - must register a nib or a class
for the identifier or connect a prototype cell in a storyboard'
And it's my code :
#import "CollectionViewController1.h"
#interface CollectionViewController1 ()
{
UICollectionView *collectionview;
}
#end
#implementation CollectionViewController1
static NSString * const reuseIdentifier = #"Cell";
- (void)viewDidLoad {
[super viewDidLoad];
UICollectionViewFlowLayout *layout = [UICollectionViewFlowLayout new];
layout.itemSize = self.view.frame.size;
collectionview = [[UICollectionView alloc]initWithFrame:CGRectZero collectionViewLayout:layout];
collectionview.pagingEnabled = TRUE;
collectionview.translatesAutoresizingMaskIntoConstraints = NO;
collectionview.delegate = self;
collectionview.dataSource = self;
collectionview.bounces = false;
[collectionview registerClass:[UICollectionViewCell class] forCellWithReuseIdentifier:reuseIdentifier];
[self.view addSubview:collectionview];
}
#pragma mark <UICollectionViewDataSource>
- (NSInteger)numberOfSectionsInCollectionView:(UICollectionView *)collectionView {
#warning Incomplete implementation, return the number of sections
return 1;
}
- (NSInteger)collectionView:(UICollectionView *)collectionView numberOfItemsInSection:(NSInteger)section {
#warning Incomplete implementation, return the number of items
return 1;
}
- (UICollectionViewCell *)collectionView:(UICollectionView *)collectionView cellForItemAtIndexPath:(NSIndexPath *)indexPath {
UICollectionViewCell *cell = [collectionView dequeueReusableCellWithReuseIdentifier:reuseIdentifier forIndexPath:indexPath];
// Configure the cell
return cell;
}
- (UIEdgeInsets)collectionView:(UICollectionView *)collectionView
layout:(UICollectionViewLayout *)collectionViewLayout
insetForSectionAtIndex:(NSInteger)section;
{
return UIEdgeInsetsMake(0, 0, 0, 0);
}
-(CGSize)collectionView:(UICollectionView *)collectionView layout:(UICollectionViewLayout *)collectionViewLayout sizeForItemAtIndexPath:(NSIndexPath *)indexPath
{
return self.view.frame.size;
}

Answer 1

I think you have another UICollectionView in storyboard with empty cell identifier

Answer 2

Add self.collectionView = collectionview; after create collection view.

Answer 3

Your crash gives a different class to the one you register:
UICollectionElementKindCell
vs
UICollectionViewCell
Change one of these to the class you want - I'm guessing the latter.