Swift - 将self.navigationController调用到自定义单元类中 [英] Swift - Call self.navigationController into custom cell class

问题描述

Swift：

我有UICollectionViewController和另一个文件/类UICollectionViewCell

I have UICollectionViewController with another file/class UICollectionViewCell

目标是推送 UIViewController 来自我的自定义单元格类。

The goal is to push UIViewController from my custom cell class.

类似这样的内容：

self.navigationController?.pushViewController(vc, animated: true)

我在 UICollectionViewController 中从 didSelectItemAtIndexPath 实现推送没有问题，但我想从自定义单元格执行此操作class注册到我的 UICollectionViewController 。

I have no problems to implement push from didSelectItemAtIndexPath in UICollectionViewController but i want to do this from custom cell class registered into my UICollectionViewController.

当我尝试从自定义单元类推送视图时遗憾的是我没有访问 self.navigationController

When i try to push view from custom cell class unfortunately i don't have access self.navigationController

此外，我想100％以编程方式执行此操作。我不使用Storyboard或Nib文件

Also i want to do this 100% programmatically. I don't use Storyboard or Nib files

提前致谢。

推荐答案

这是一个坏主意。观点不应该/做那种逻辑。你应该把它留给控制器（这就是 MVC-Pattern 的内容）。

This is a bad idea. Views should not have/do that kind of logic. You should leave it with the Controller (that's what the MVC-Pattern is about).

无论如何：

class MyCollectionViewCell: UITableViewCell {
    var myViewController: MyViewController!
}

当单元格出列时你可以这样设置：

and when the cell is dequeued you could set it like this:

func collectionView(collectionView: UICollectionView, cellForItemAtIndexPath indexPath: NSIndexPath) -> UICollectionViewCell
{
    let cell: MyCollectionViewCell = collectionView.dequeueReusableCellWithReuseIdentifier(myCellIdentifier, forIndexPath: indexPath) as! MyCollectionViewCell
    let nvc: UINavigationController = UIStoryboard(name: "myStoryboard", bundle: nil).instantiateViewControllerWithIdentifier("myNavigationController") as! UINavigationController
    cell.myViewController = nvc.childViewControllers.first as! MyViewController

    return cell
}

以及选择：

func collectionView(collectionView: UICollectionView, didSelectItemAtIndexPath indexPath: NSIndexPath)
{
    let cell: MyCollectionViewCell = collectionView.cellForItemAtIndexPath(indexPath) as! MyCollectionViewCell

    // I don't know where vc comes from
    cell.myViewController.navigationController?.pushViewController(vc, animated: true)
}

尽管如此，我认为没有任何理由可以解决这个问题。因此，重新考虑您的架构。

Still, there is no case I can think of, where this would make any sense. So rethink your architecture again.

通过在纸上绘制实体，可视化实体的沟通。您必须绘制模型，视图和控制器，并且只允许控制器与其他人交谈的控制器即可。

Visualize the communication of your entities, by drawing it on a paper. You'll have to draw Models, Views and Controllers and only Controllers are allowed to "talk" to other Controllers.

查看这个和这个

这篇关于Swift - 将self.navigationController调用到自定义单元类中的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！