我有一个UICollectionView，它被限制在屏幕的边缘。然而，当屏幕加载时，我希望第一个单元格有一些填充，这样它的位置就会稍微偏离屏幕的左边缘。我怎样才能做到这一点？
collectionView.contentInset = UIEdgeInsets(top: 10, left: 10, bottom: 10, right: 10)
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您可以使用以下UICollectionViewDelegateFlowLayout委托函数控制填充：
extension YourCollectionViewController : UICollectionViewDelegateFlowLayout {
func collectionView(_ collectionView: UICollectionView, layout collectionViewLayout: UICollectionViewLayout, sizeForItemAt indexPath: IndexPath) -> CGSize {
let width = collectionView.frame.width
return CGSize(width: width/2 - (inset+padding), height: width/2 - (inset+padding))
}
func collectionView(_ collectionView: UICollectionView, layout collectionViewLayout: UICollectionViewLayout, insetForSectionAt section: Int) -> UIEdgeInsets {
return UIEdgeInsets(top: 10, left: 10, bottom: 10, right: 10)
}
func collectionView(_ collectionView: UICollectionView, layout collectionViewLayout: UICollectionViewLayout, minimumInteritemSpacingForSectionAt section: Int) -> CGFloat {
return 1.0
}
func collectionView(_ collectionView: UICollectionView, layout collectionViewLayout: UICollectionViewLayout, minimumLineSpacingForSectionAt section: Int) -> CGFloat {
return 1.0
}
}