我有一个collectionView,我想一次选择一个单元格。并更改所选单元格的背景。我遇到一个问题,当我在didSelectItem()方法中选择一个单元格时,以前选择的单元格背景没有变化。
func collectionView(_ collectionView: UICollectionView,didSelectItemAt indexPath: IndexPath) {
if let cell2 = self.segmentScrollView.cellForItem(at: selectedcellNo!) as? segmentCollectionViewCell {
//self.segmentScrollView.reloadItems(at: [selectedcellNo!])
cell2.segmentName.backgroundColor = .white
cell2.segmentName.textColor = UIColor.init(red: 141/255, green: 0/255, blue: 22/255, alpha: 1.0)
self.segmentScrollView.deselectItem(at: selectedcellNo!, animated: true)
}
let cell = self.segmentScrollView.cellForItem(at: indexPath) as? segmentCollectionViewCell
cell?.segmentName.backgroundColor = UIColor.init(red: 141/255, green: 0/255, blue: 22/255, alpha: 1.0)
cell?.segmentName.textColor = .white
let dateValue = self.segmentJSON[indexPath.row]["date"].stringValue
self.getShows(date: dateValue)
print("selectedcellNo-now: ",selectedcellNo!)
self.selectedcellNo! = indexPath
}
答案 0 :(得分:1)
在您的自定义UICollectionViewCell
中,覆盖 isSelected
属性,然后根据backgroundColor
观察者(即
class CollectionViewCell: UICollectionViewCell {
override var isSelected: Bool {
didSet {
self.backgroundColor = isSelected ? .red : .white
}
}
//rest of the code...
}
在这种情况下,无需实现didSelectItemAt
。