我希望突出显示更改集合视图内对象的大小和外观。CollectionView对象(Swift)
如何在“didHighlight”方法内的集合视图单元格中设置对象属性?
在 “cellForItemAtIndexPath” 声明的可重复使用的细胞作为类
,只需使用 “cell.MyOutlet.backgroundColor = UIColor.blueColor()”
func collectionView(collectionView: UICollectionView, cellForItemAtIndexPath indexPath: NSIndexPath) -> UICollectionViewCell {
if collectionView == self.CollectionViewController {
let (FriendFirstName,FriendLastName) = friends[indexPath.row]
let cell: CustomCellA = collectionView.dequeueReusableCellWithReuseIdentifier("demoCell", forIndexPath: indexPath) as! CustomCellA
if indexPath.section == 0 {
cell.cellTitle.text = Name
cell.imgCell.image = UIImage(named: Pics[indexPath.row])
cell.imgCell.layer.masksToBounds = true
cell.self.imgCell.layer.cornerRadius = 20
return cell
} else {
let cell2: AddCell = collectionView.dequeueReusableCellWithReuseIdentifier("demoCell2", forIndexPath: indexPath) as! AddCell
return cell2
}
} else if collectionView == self.EmojiCollectionViewController {
let cellB: CustomCellB = collectionView.dequeueReusableCellWithReuseIdentifier("demoCellB", forIndexPath: indexPath) as! CustomCellB
cellB.MyLabel.text = arrayOne[indexPath.row]
return cellB
} else {
let cellC: CustomCellC = collectionView.dequeueReusableCellWithReuseIdentifier("demoCellC", forIndexPath: indexPath) as! CustomCellC
// ...Set up cell
let height = self.CollectionViewController2.frame.height
cellC.frame = CGRectMake(cellB.frame.origin.x, 0, cellB.frame.size.width, height)
cellC.updateConstraintsIfNeeded()
cellC.layoutIfNeeded()
cellC.imgVw.image = UIImage(named: pictures[indexPath.row] as! String)
return cellC
}
}
func collectionView(collectionView: UICollectionView, didHighlightItemAtIndexPath indexPath: NSIndexPath) {
if collectionView == self.CollectionViewController {
if indexPath.section == 0 {
let cell: CustomCellA = CustomCellB()
cell.MyLabel.backgroundColor = UIColor.blueColor() //crashes due to nil value)
}
} else {
}
}
我尝试在didHighlight中使用类似的定义,并且它一直崩溃。
这不会打开自定义类的对象。当单元格突出显示时,我需要更改单元格内的对象框架。 –