Swift 4 - 从 UICollectionView Cell 推送一个 ViewController [英] Swift 4 - Push a ViewController from a UICollectionView Cell

问题描述

我被困在我的项目中，需要一些帮助.我想从 UICollectionViewCell 包括我的 UINavigationBar 推送/呈现一个 UICollectionViewController.我知道您实际上无法从 Cell 中呈现 ViewController?这种情况我该怎么办?我的问题是我的 NavigationBar 不会出现.

I'm stuck in my project and is in need for some help. I want to push/present a UICollectionViewController from a UICollectionViewCell including my UINavigationBar. I have understand that you can not actually present a ViewController from a Cell? How do I supposed to do in this case? My problem is that my NavigationBar won´t show up.

这是我的手机:

import UIKit
import Firebase

class UserProfileHeader: UICollectionViewCell, UIImagePickerControllerDelegate, UINavigationControllerDelegate {

lazy var followersLabelButton: UIButton = {
    let button = UIButton(type: .system)
    button.setTitle("followers", for: .normal)
    button.setTitleColor(UIColor.lightGray, for: .normal)
    button.titleLabel?.font = UIFont.boldSystemFont(ofSize: 14)
    button.addTarget(self, action: #selector(followers), for: .touchUpInside)
    return button
}()

@objc fileprivate func followers() {

    let newController = NewController(collectionViewLayout: UICollectionViewFlowLayout())

    self.window?.rootViewController?.present(newController, animated: true, completion: nil)


    }

   }

和 CollectionViewController:

And the CollectionViewController:

import UIKit
import MapKit
import Firebase

class UserProfileController: UICollectionViewController, UICollectionViewDelegateFlowLayout, UIGestureRecognizerDelegate {

    var userId: String?

    override func viewDidLoad() {
        super.viewDidLoad()

        collectionView?.backgroundColor = UIColor.white


        collectionView?.register(UserProfileHeader.self, forSupplementaryViewOfKind: UICollectionView.elementKindSectionHeader, withReuseIdentifier: "headerId")

    }


    override func collectionView(_ collectionView: UICollectionView, viewForSupplementaryElementOfKind kind: String, at indexPath: IndexPath) -> UICollectionReusableView {
        let header = collectionView.dequeueReusableSupplementaryView(ofKind: kind, withReuseIdentifier: "headerId", for: indexPath) as! UserProfileHeader

        header.user = self.user

        return header
    }


    func collectionView(_ collectionView: UICollectionView, layout collectionViewLayout: UICollectionViewLayout, referenceSizeForHeaderInSection section: Int) -> CGSize {


        return CGSize(width: view.frame.width, height: 200)


    }


}

推荐答案

1- 单元格内部

weak var delegate:UserProfileController?

2- 内部 cellForItemAt

cell.delegate = self

3- 在单元格内使用它

3- Use this inside the cell

delegate?.present(newController, animated: true, completion: nil)

顺便说一句，我想你的意思

BTW i think you mean

delegate?.navigationController?.pushViewController(newController, animated: true)  

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