라인 당 4 개에 맞게 셀의 크기를 자동으로 조정하는 방법

Question

콜렉션 뷰가 있습니다. 셀을 라인 당 4 개의 셀 (특정 스크린 크기)에 맞출 수있는 방법을 찾고있었습니다. 모든 세포의 크기. 나머지 셀에는 재사용 가능한 셀이 있습니다.

Answer 1

extension LevelSelectController: UICollectionViewDelegateFlowLayout { 

// Collection view flow layout setup 
func collectionView(_ collectionView: UICollectionView, layout collectionViewLayout: UICollectionViewLayout, sizeForItemAt indexPath: IndexPath) -> CGSize { 
    // Compute the dimension of a cell for an NxN layout with space S between 
    // cells. Take the collection view's width, subtract (N-1)*S points for 
    // the spaces between the cells, and then divide by N to find the final 
    // dimension for the cell's width and height. 

    let cellsAcross: CGFloat = 4 
    let spaceBetweenCells: CGFloat = 0 
    let dim = (collectionView.bounds.width - (cellsAcross - 1) * spaceBetweenCells)/cellsAcross 

    return CGSize(width: dim, height: dim) 
} 

func collectionView(_ collectionView: UICollectionView, layout collectionViewLayout: UICollectionViewLayout, insetForSectionAt section: Int) -> UIEdgeInsets { 
    return UIEdgeInsetsMake(0, 0, 0.0, 0.0) 
} 

func collectionView(_ collectionView: UICollectionView, layout collectionViewLayout: UICollectionViewLayout, minimumLineSpacingForSectionAt section: Int) -> CGFloat { 
    return 0.0 
} 

func collectionView(_ collectionView: UICollectionView, layout collectionViewLayout: UICollectionViewLayout, minimumInteritemSpacingForSectionAt section: Int) -> CGFloat { 
    return 0.0 
}