use of undeclared identifier collectionView

Question

i am trying to create collectionView but it creates error as: use of undeclared identifier in collectionView.

- (UICollectionView *)collectionView:(UICollectionView *)collectionView
               cellForRowAtIndexPath:(NSIndexPath *)indexPath {

  UICollectionViewCell *cell =
      [collectionView dequeueReusableCellWithIdentifier:@"MyIdentifier"];

  if (cell == nil) {
    cell = [[UICollectionViewCell alloc] init];

    [UICollectionView setBackgroundColor:[UIColor redColor]];
  }

  [self.view addSubview:__collectionView];

  // Do any additional setup after loading the view, typically from a nib.
}

Have you registered cell with the identifier `MyIdentifier `? or do you have a prototype cell in the storyboard with that ID? — Anil Varghese, Feb 20 '15 at 06:22
You dont have to create cell, you have to do either of the two things asi mentioned in the above comment — Anil Varghese, Feb 20 '15 at 06:24

score 0 · Answer 1 · answered Feb 20 '15 at 06:28

0

Registe your nib in view Did load method...

UINib *cellNib = [UINib nibWithNibName:@"NibCell" bundle:nil];
[self.collectionView registerNib:cellNib forCellWithReuseIdentifier:@"cvCell"];

now run your app...

answered Feb 20 '15 at 06:28

Chandan

1,046
12
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Error in this line - (UICollectionView *)collectionView:(UICollectionView *)collectionView cellForRowAtIndexPath:(NSIndexPath *)indexPath – Mano Chitra R Feb 20 '15 at 06:31
NO plz add your nib file (Cell ) in method view did load in .m file .. for more info ... http://stackoverflow.com/questions/17856055/creating-a-uicollectionview-programmatically – Chandan Feb 20 '15 at 06:33
yes it come bcs you don't register your cell so first register cell ... visit url may help you......http://adoptioncurve.net/archives/2012/09/a-simple-uicollectionview-tutorial/ – Chandan Feb 20 '15 at 06:35

score 0 · Accepted Answer · answered Feb 20 '15 at 06:32

0

If you are not using prototypeCell in the storyboard. You could either register Cell/Xib with the collectionView. Do this in viewDidLoad

[self.collectionView registerClass:[UICollectionViewCell class]
forCellWithReuseIdentifier: @"MyIdentifier"];

answered Feb 20 '15 at 06:32

Anil Varghese

41,329
9
90
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use of undeclared identifier collectionView

2 Answers2