Ios 如何从单元格中的按钮调用外部函数

我使用一个主类调用

newsfeedconcontroller

作为

UICollectionViewController

。 1.在cell inside中，我有一个带有like按钮的新闻提要（为了填充单元格，我使用了一个名为“FeedCell”的类） 2.从单元格中（在mainview中）我有一个标签（labelX），用于“splash message”，带有一个名为“messageAnimated”的函数

如何从单元格内的按钮调用“messageAnimated”函数

我想将标签文本更改为例如：“你只是喜欢它”

---

感谢您在FeedCell中帮助我

，您应该声明一个委托（阅读委托模式）

在单元实现中（假设手动添加目标）

在视图控制器中

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()
    }
}

---

在FeedCell中，您应该声明一个委托（阅读委托模式）

在单元实现中（假设手动添加目标）

在视图控制器中

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()
    }
}

---

你能为你的“按钮”和功能“messageAnimated”在哪里写一些代码吗？你能为你的“按钮”和功能“messageAnimated”在哪里写一些代码吗？对不起，我是新来的，你能再帮我一点吗（再次，对不起，非常感谢你的帮助）对不起，我是新来的，你能再帮我一点吗（再一次，对不起，非常感谢你帮我）

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()
    }
}