我有设置UICollectionViewCell
其具有相对宽度来collectionView
边界阴影路径问题。
即时通讯使用的故事板的约束,在AwakeFromNib
方法建立影子,并用sizeForItemAt
方法调整细胞
//cell awakeFromNib
override func awakeFromNib() {
self.backgroundColor = UIColor.white
self.contentView.layer.cornerRadius = 2.0
self.contentView.layer.borderWidth = 1.0
self.contentView.layer.borderColor = UIColor.clear.cgColor
self.contentView.layer.masksToBounds = true
self.layer.shadowColor = UIColor.black.cgColor
self.layer.shadowOffset = CGSize(width: 0, height: 2.0)
self.layer.shadowRadius = 2.0
self.layer.shadowOpacity = 0.5
self.layer.masksToBounds = false
self.layer.shadowPath = UIBezierPath(roundedRect: self.bounds, cornerRadius: self.contentView.layer.cornerRadius).cgPath
}
// collection view method
func collectionView(_ collectionView: UICollectionView, layout collectionViewLayout: UICollectionViewLayout, sizeForItemAt indexPath: IndexPath) -> CGSize {
let height: CGFloat = 288
return CGSize(width: collectionView.bounds.size.width-20, height: height)
}
细胞界限:
AwakeFromNib
方法 - (307.0,288.0)
预计 - (300.0,288.0)
问题是什么?
问题是,如果你的电池layouted边界/框架正在发生变化。
添加到您的collectionViewCell - 子类:
override func layoutSubviews() {
super.layoutSubviews()
self.layer.shadowPath = UIBezierPath(roundedRect: self.bounds, cornerRadius: self.contentView.layer.cornerRadius).cgPath
}