How to reload the same indexPath item for UICollectionView?

That would defeat the purpose of having reusable cells.

What are you trying to accomplish?

You should not care which item you return "internlly". What is important is to return the item at the given position.

If you have trouble here, taht's probably because you have some design flaw elsewhere. For instance, if you try to use collectionView as a dataStore, which you should never do.

Please post the complete class code for more specific help.

I have a problem that the imageView in the cell will load another url image,so the imageView will flash.

For Example:

- (__kindof UICollectionViewCell *)collectionView:(UICollectionView *)collectionView cellForItemAtIndexPath:(NSIndexPath *)indexPath {

TestCollectionCell *cell = [collectionView dequeueReusableCellWithReuseIdentifier:@"TestCollectionViewCell" forIndexPath:indexPath];

TestImageView *imageView = [cell getImageView];

imageView.url = self.data[indexPath.row];

return cell;

}

TestImageView have the property url to download the url image.(like SDWebImage)

If `dequeueReusableCellWithReuseIdentifier` return another cell, the url will be diffrent and imageView will replace the current image with the url image.So the user will find the cell will splash one time if uicollectionview reloadData.

If `dequeueReusableCellWithReuseIdentifier` can return the same cell, the url property will be equal and imageView will not replace current image.

That's my problem.Thanks

Thanks for your reply.

I have a problem that the imageView in the cell will load another url image,so the imageView will flash.

For Example:

- (__kindof UICollectionViewCell *)collectionView:(UICollectionView *)collectionView cellForItemAtIndexPath:(NSIndexPath *)indexPath {

TestCollectionCell *cell = [collectionView dequeueReusableCellWithReuseIdentifier:@"TestCollectionViewCell" forIndexPath:indexPath];

TestImageView *imageView = [cell getImageView];

imageView.url = self.data[indexPath.row];

return cell;

}

TestImageView have the property url to download the url image.(like SDWebImage)

If `dequeueReusableCellWithReuseIdentifier` return another cell, the url will be diffrent and imageView will replace the current image with the url image.So the user will find the cell will splash one time if uicollectionview reloadData.

If `dequeueReusableCellWithReuseIdentifier` can return the same cell, the url property will be equal and imageView will not replace current image.

That's my problem.Thanks

What is

    TestImageView *imageView = [cell getImageView];

doing ?

Why do you need it ?

OK, then I think the proper thing to do would be to not reload the cells whose images aren’t changing. Don’t call reloadData(). Insert/delete/reload only the cells that are changing.