3DTouch上的SFSafariViewController问题(弹出状态)

Question

我正在尝试在TableViewController中实现窥视和弹出功能，以便当我3DTouch任何单元格时，它会向我显示它们点击时将带我转到的SFSafariViewController的预览。peek功能工作得很好，但是一旦它转到pop状态，它就不会在desired state中提供SFSafariViewController，而是显示前一个视图中的导航控制器，以及一个显示SFViewController (Image Here)的小尺寸视图。

这是我如何在我的TableViewController中编写窥视和弹出功能的：

extension MyBlogsTableViewController: UIViewControllerPreviewingDelegate {

func previewingContext(previewingContext: UIViewControllerPreviewing, viewControllerForLocation location: CGPoint) -> UIViewController? {
    if let indexPath = tableView.indexPathForRowAtPoint(location) {

            let cell = tableView.cellForRowAtIndexPath(indexPath) as! MyBlogsTableViewCell

            let destinationViewController = SFViewControllerToExplore(indexPath.row)
            destinationViewController.preferredContentSize = CGSize(width: 0.0, height: 0.0)

            previewingContext.sourceRect = cell.frame

            return destinationViewController
    }
    return nil
}

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

private func touchedView(view: UIView, location: CGPoint) -> Bool {
    let locationInView = view.convertPoint(location, fromView: tableView)
    return CGRectContainsPoint(view.bounds, locationInView)
}

private func SFViewControllerToExplore(index: Int) -> UIViewController {
    var destinationController: SFSafariViewController

    destinationController = SFSafariViewController(URL: NSURL(string: identifierOfLinks[index])!, entersReaderIfAvailable: true)

    return destinationController
}

}

Answer 1

我想通了。所以在下面的代码中：

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

我实际上不应该使用pushViewController，而应该使用presentViewController

已更正的代码：

func previewingContext(previewingContext: UIViewControllerPreviewing, commitViewController viewControllerToCommit: UIViewController) {
     navigationController?.presentViewController(viewControllerToCommit, animated: true, completion: nil)
}