每当我的isLive函数返回true时,我都会尝试向imageview添加底部边框。我检查了部件,它只执行一次。但是,有多个单元格具有蓝色底部边框。此代码如下所示:
DispatchQueue.main.async {
if CommunityViewController().isLive(startTime: startTime, endTime: endTime, name: self.cellChannel[indexPath.row].communityName){
cell.imageView.addBottomBorderWithColor(color: constants.waterblue, width: 3)
}
}
我的addBottomBorderWithColor是一个扩展名,如下所示:
func addBottomBorderWithColor(color: UIColor, width: CGFloat) {
let border = CALayer()
border.backgroundColor = color.cgColor
border.frame = CGRect(x: 0, y: self.frame.size.height - width, width: self.frame.size.width, height: width)
self.layer.addSublayer(border)
}
据我所知,我需要删除prepareForReuse函数中的下边框。我试图用另一个扩展名删除它:
func removeBottomBorderWithColor(color: UIColor, width: CGFloat) {
let border = CALayer()
border.backgroundColor = color.cgColor
border.frame = CGRect(x: 0, y: self.frame.size.height - width, width: self.frame.size.width, height: width)
self.layer.addSublayer(border)
border.removeFromSuperlayer()
}
prepareForReuse是正确的方法还是我需要以其他方式设置它?
我用以下方式调用prepareForReuse:
override func prepareForReuse() {
self.imageView?.removeBottomBorderWithColor(color: constants.waterblue, width:3)
}
答案 0 :(得分:1)
self.imageView?.layer.sublayers?.forEach { $0.removeFromSuperlayer() }
尝试直接使用此代码以准备重用方法。在cellForItemAtIndexPath方法中添加图层。