我有一个UICollectionView,当点击时,单元格被赋予蓝色边框。问题是,当我向下滚动到更多单元格时,一些新单元模仿蓝色边框而没有被轻敲。有谁知道如何解决这个问题?
代码:
func collectionView(collectionView: UICollectionView, numberOfItemsInSection section: Int) -> Int {
return tradeImages.count
}
func collectionView(collectionView: UICollectionView, cellForItemAtIndexPath indexPath: NSIndexPath) -> UICollectionViewCell {
let cell: OffersCollectionViewCell = collectionView.dequeueReusableCellWithReuseIdentifier("cell4", forIndexPath: indexPath) as! OffersCollectionViewCell
tradeImages[indexPath.row].getDataInBackgroundWithBlock{
(imageData: NSData?, error: NSError?) -> Void in
if error == nil {
let image = UIImage(data: imageData!)
cell.offersImg.image = image
}
}
return cell
}
func collectionView(collectionView: UICollectionView, shouldSelectItemAtIndexPath indexPath: NSIndexPath) -> Bool {
var cell = self.collectionView.cellForItemAtIndexPath(indexPath)
if cell!.tag == 0 {
cell!.layer.borderWidth = 2.0
cell!.layer.borderColor = UIColor.blueColor().CGColor
offersArray.append(objectsArray[indexPath.row] as! PFObject)
cell!.tag = 1
} else {
cell!.layer.borderWidth = 0.0
cell!.tag = 0
if let index = find(offersArray, objectsArray[indexPath.row] as! PFObject) {
offersArray.removeAtIndex(index)
}
}
return true
}
答案 0 :(得分:1)
使用prepareForReuse()
中的方法OffersCollectionViewCell
,并为您的单元格设置初始值以供重复使用。
例如:
override func prepareForReuse() {
super.prepareForReuse()
layer.borderWidth = 0.0
layer.borderColor = UIColor.whiteColor().CGColor
// Other initial values
}