如何从导航堆栈中弹出前一个视图控制器?

How to pop the previous view controller from a navigation stack?

我使用导航控制器从一个视图推送到另一个视图,但我不弹出任何我推送的视图。因此,当我加载一个视图时,我想从堆栈中弹出前一个视图。

浏览量推送代码:

var identities = [String]()

identities = ["A", "B", "C", "D", "E"]

func collectionView(_ collectionView: UICollectionView, didSelectItemAt indexPath: IndexPath) {

    let vcName = identities[indexPath.row]
    let viewController = storyboard?.instantiateViewController(withIdentifier: vcName)
    self.navigationController?.pushViewController(viewController!, animated: true)

}

弹出视图的测试代码(不是我想要的):

self.navigationController?.viewControllers.remove(at: 0)

如有任何帮助,我们将不胜感激。

已解决:

@DonMag 帮助我了解了该行代码的正确使用和放置。

这对我有用:

var navigationArray = self.navigationController?.viewControllers

navigationArray.remove(at: 0)

self.navigationController?.viewControllers = navigationArray

真的简单多了:

self.navigationController?.popViewController(animated: true)