How to display only 5 cells in CollectionView?-CodePudding

i want to show only 5 posts from my Wordpress Website into CollectionView in my Swift app. i am very new to Swift. i have set this as url

https://www.sikhnama.com/wp-json/wp/v2/posts/?categories=4&per_page=5

and this get only 5 posts from Wordpress but in collectionView after 5 posts it repeats the posts, but i want after 5 cells there should not be any more cell and post. this is my code ..

 func numberOfSections(in collectionView: UICollectionView) -> Int {
    return 2
}

func collectionView(_ collectionView: UICollectionView, numberOfItemsInSection section: Int) -> Int{
    return newsData.count   (newsData.count/4)
}

func collectionView(_ collectionView: UICollectionView, cellForItemAt indexPath: IndexPath) -> UICollectionViewCell {
    
     if (indexPath.item % 4 == 3){
        
        let adcell = collectionView.dequeueReusableCell(withReuseIdentifier: "adcell", for: indexPath) as! RelatedViewCell
         
        
       
         adcell.banner.adUnitID = bannerAd
         adcell.banner.rootViewController = self
         adcell.banner.load(GADRequest())
         adcell.banner.delegate = self
        
       return adcell
        
    }
    
    else{
        
       
        
        let cell = collectionView.dequeueReusableCell(withReuseIdentifier: "postcell", for: indexPath) as! RelatedViewCell
        
        
        
        cell.setup(with: newsData[indexPath.row-(indexPath.row/4)])
        return cell
    }
}

i have tried this also

func collectionView(_ collectionView: UICollectionView, numberOfItemsInSection section: Int) -> Int{
    return 5
}

then i get error on this line that "Index out of Range"

 cell.setup(with: newsData[indexPath.row-(indexPath.row/4)])

also tried

cell.setup(with: newsData[indexPath.row])

but not works,, help please

CodePudding user response：

As per comments...

With this code:

func numberOfSections(in collectionView: UICollectionView) -> Int {
    return 2
}

You are saying the collection view has two sections.

But, in neither numberOfItemsInSection nor cellForItemAt are you accounting for multiple sections.

So, you are duplicating the same cells in each section.

Unless you really have 2 sections, you should return 1 for numberOfSections

CodePudding user response：

The numbersOfItemsInSection func is what you will set to show only 5. But if you are grabbing data from an api there might not be 5 leaving you with a "Index out of Range" error.

What I would do:

func collectionView(_ collectionView: UICollectionView, numberOfItemsInSection section: Int) -> Int{
if newsData.count   (newsData.count/4) > 5 {
return 5
} else {
 return newsData.count   (newsData.count/4)
 }     
}

This will check the data coming back and if greater than 5 only show 5 if it's less than 5 it will show that amount.