方向改变时扭曲的角半径

Distorted corner radius on orientation change

我有以下代码,方向在加载时效果很好,但是当方向改变时它会变形,也就是说,如果它以纵向加载并更改为横向,角半径会变形,就像它发生变化一样从圆到方。

func collectionView(_ collectionView: UICollectionView, cellForItemAt indexPath: IndexPath) -> UICollectionViewCell {
    let cell = categoryCV.dequeueReusableCell(withReuseIdentifier: "CategoryCVC", for: indexPath) as! CategoryCollectionViewCell

    cell.catLabel.text = cities[indexPath.row].name
    cell.catImg.image = UIImage(named:cities[indexPath.row].image)
    cell.layer.cornerRadius = cell.layer.frame.size.height/2
    cell.layer.borderColor = UIColor.white.cgColor
    cell.layer.borderWidth = 2

    return cell
}

如何避免这种情况发生?有没有办法在 viewDidLayoutSubviews() 中调用 cellForItemAt indexpath,然后在那里配置 corner radius

你能试试吗

func viewWillTransition(to size: CGSize, with coordinator: UIViewControllerTransitionCoordinator)
{

    self.collectionView.reloadData()

    self.collectionView.layoutIfNeeded()

}