我使用主要类别newsFeedCointroller
作为UICollectionViewController
。
1.在单元格内部我有一个带有类似按钮的新闻源(填充单元格我使用一个名为&#34的类; FeedCell")
2.从单元格(在主视图中)我有一个标签(labelX)用于"泼水消息"使用名为" messageAnimated"
如何拨打" messageAnimated"从单元格内的按钮开始工作。
我想将标签文字更改为例如:"您只是喜欢它" ...
感谢您的帮助
答案 0 :(得分:3)
在您的FeedCell中,您应该声明一个委托(阅读委托模式here)
protocol FeedCellDelegate {
func didClickButtonLikeInFeedCell(cell: FeedCell)
}
在您的单元格实现中(假设您手动添加目标)
var delegate: FeedCellDelegate?
override func awakeFromNib() {
self.likeButton.addTarget(self, action: #selector(FeedCell.onClickButtonLike(_:)), forControlEvents: .TouchUpInside)
}
func onClickButtonLike(sender: UIButton) {
self.delegate?.didClickButtonLikeInFeedCell(self)
}
在View控制器中
extension FeedViewController: UICollectionViewDataSource, UICollectionViewDelegate {
func collectionView(collectionView: UICollectionView, cellForItemAtIndexPath indexPath: NSIndexPath) -> UICollectionViewCell {
let cell = collectionView.dequeueReusableCellWithReuseIdentifier("feedCell", forIndexPath: indexPath) as! FeedCell
// Do your setup.
// ...
// Then here, set the delegate
cell.delegate = self
return cell
}
// I don't care about other delegate functions, it's up to you.
}
extension FeedViewController: FeedCellDelegate {
func didClickButtonLikeInFeedCell(cell: FeedCell) {
// Do whatever you want to do when click the like button.
let indexPath = collectionView.indexPathForCell(cell)
print("Button like clicked from cell with indexPath \(indexPath)")
messageAnimated()
}
}