dynamic height of the collectionView

DynamicHeight.swift

public func collectionView(_ collectionView: UICollectionView, layout collectionViewLayout: UICollectionViewLayout, sizeForItemAt indexPath: IndexPath) -> CGSize {
        let height = calculateDynamicHeightOftheCell(index: indexPath.row)
        return CGSize(width: self.collectionView.bounds.width, height: height)
    }
    
    /**
     Calculates the height of the card based on the content inside the view.
     - parameters:
     - index = identifies which cell it is.
     */
    func calculateDynamicHeightOftheCell(index: Int) -> CGFloat {
        let creditCard = data[index]
        
        let arbitraryHeight: CGFloat = 1000
        
        //basically subtract leading and trailing spaces set for the view when laying out. for eg: we have two 16 collectionview leading and trailing spaces, two 24 view leading and trailing spaces.
        let approximateWidthOfComponent = view.frame.size.width - 16 - 16 - 24 - 24
        
        //calculate the approximate height of the credit card name label , with arbitrary height of 1000
        let sizeOfLabel1 = CGSize(width: approximateWidthOfComponent, height: arbitraryHeight)
        
        //Get the attributes of the label
        let attributesForLabel1 = [NSAttributedString.Key.font: UIFont.systemFont(ofSize: 20, weight: UIFont.Weight.bold)]
        
        //calculate the new frame the above calculated attributes and approximate height
        let estimatedFrameForLabel1 = NSString(string: creditCard.name).boundingRect(with: sizeOfLabel1, options: .usesLineFragmentOrigin, attributes: attributesForLabel1, context: nil)
        
        //Calculate the actual height by adding the above newly generated frames plus the static heights of the other components and stand spacings between them for eg: credit card image is static height (137) , read more button height (20) , standard spacings ( 4 * 16 ) , APR view height (248) etc..
        let height = estimatedFrameForLabel1.height + estimatedFrame.height + 287 + 248
        
        return height
    }