ios - viewControllerToCommit 函数中的 IndexPath

Question

我需要能够在 Peek 和 Pop 的提交函数中为我的 UICollectionView 获取 indexPath.row。

func previewingContext(_ previewingContext: UIViewControllerPreviewing, commit viewControllerToCommit: UIViewController) {

    }

我需要这样做，因为 UICollectionView 中的每一行都会打开一个不同的 View Controller ，并且需要为不同的行传递信息。有什么想法吗？

Answer 1

推荐的方法是呈现 viewControllerToCommit 对象，该对象应该已经填充了您的 UICollectionView 的好项目:

func previewingContext(_ previewingContext: UIViewControllerPreviewing, viewControllerForLocation location: CGPoint) -> UIViewController? {
    guard let indexPath = collectionView.indexPathForItem(at: location), let cell = collectionView.cellForRow(at: indexPath) as? YOUR_CELL_CLASS else {
        return nil
    }

    previewingContext.sourceRect = cell.frame

    let viewController = YOUR_VIEW_CONTROLLER_CLASS()
    viewController.yourObject = cell.yourObject
    return viewController
}

func previewingContext(_ previewingContext: UIViewControllerPreviewing, commit viewControllerToCommit: UIViewController) {
    navigationController?.pushViewController(viewControllerToCommit, animated: true)
}