3

我在我的集​​合视图单元格中添加了 3D Touch Peek/Pop 功能,效果很好,但是我注意到预览框架不尊重单元格的角半径。

这是我的预览功能:

func previewingContext(previewingContext: UIViewControllerPreviewing, viewControllerForLocation location: CGPoint) -> UIViewController? {
    let viewController = storyboard?.instantiateViewControllerWithIdentifier("scholarDetailViewController") as? ScholarDetailViewController
    let cellPosition = self.scholarsCollectionView.convertPoint(location, fromView: self.view)
    let cellIndex = self.scholarsCollectionView.indexPathForItemAtPoint(cellPosition)

    guard let previewViewController = viewController, indexPath = cellIndex, cell = self.scholarsCollectionView.cellForItemAtIndexPath(indexPath) else {
        return nil
    }

    let scholar = self.searchBarActive ? self.searchResults[indexPath.item] as! Scholar : self.currentScholars[indexPath.item]
    previewViewController.setScholar(scholar.id)
    previewViewController.delegate = self
    previewViewController.preferredContentSize = CGSize.zero
    previewingContext.sourceRect = self.view.convertRect(cell.frame, fromView: self.scholarsCollectionView)

    return previewViewController
}

我已经尝试设置 previewingContext sourceView 的角半径并在单元格上使用 maskToBounds ,但到目前为止我尝试过的没有任何帮助。

这是单元格设置:

override func awakeFromNib() {
    self.layer.cornerRadius = 7
}

有人有什么建议吗?

4

1 回答 1

9

据我了解,您希望拥有类似第一个而不是第二个的东西:

正确的那一个 错了一个

问题是您在整个视图上注册通知。像这样的东西: registerForPreviewingWithDelegate(self, sourceView: self.view),这就是为什么你的触摸区域对细胞层一无所知。

你应该做什么 - 亲自注册每个单元格:

func collectionView(collectionView: UICollectionView, willDisplayCell cell: UICollectionViewCell, forItemAtIndexPath indexPath: NSIndexPath) {

    let previwingController = registerForPreviewingWithDelegate(self, sourceView: cell)
    previwingControllers[cell] = previwingController
}

func collectionView(collectionView: UICollectionView, didEndDisplayingCell cell: UICollectionViewCell, forItemAtIndexPath indexPath: NSIndexPath) {

    if let previwingController = previwingControllers[cell] {
      unregisterForPreviewingWithContext(previwingController)
    }
}

只需更改previewingContext.sourceRect = self.view.convertRect(cell.frame, fromView: self.scholarsCollectionView)previewingContext.sourceRect = cell.bounds

PS当然不要忘记删除registerForPreviewingWithDelegate你的观点:)

于 2016-06-02T17:22:45.637 回答