ios - 如何从 UICollectionView Cell 转到另一个 ViewController Swift

Question

假设我有一个用户单元。我需要为此用户启动一个 ChatViewController。所以，我有 UICollectionView 显示为原始(1 个单元格 = 1 行)。如何从单元格转到 ChatViewController？

我根本不使用 InterfaceBuilder。只能通过代码方式。

我计划使用 didSelectItemAt，但我没有足够的快速编程技能来弄清楚如何使用此函数来达到我的目的。当我尝试在 didSelectItemAt 函数中编写 prepare for segue 或 performSegue with Identifier 时，Xcode 没有提供正确的自动完成功能。我的代码如下:

import UIKit

class MyList: UICollectionViewCell, UICollectionViewDataSource, UICollectionViewDelegate, UICollectionViewDelegateFlowLayout {

    override init(frame: CGRect) {
        super .init(frame: frame)
        setUpLocalizedUserList()

    }


    //Click on User Cell
    func collectionView(_ collectionView: UICollectionView, didSelectItemAt indexPath: IndexPath) {
        print("Click")

    }


    //Localized User List (Collection View)
    private func setUpLocalizedUserList(){
        let layout: UICollectionViewFlowLayout = UICollectionViewFlowLayout()
        layout.sectionInset = UIEdgeInsets(top: 0, left: 0, bottom: 20, right: 0)
        layout.minimumLineSpacing = 0
        layout.itemSize = CGSize(width: UIScreen.main.bounds.width, height: 80)

        let userListFrame = CGRect(x: 0, y: 0, width: Int(UIScreen.main.bounds.width), height: Int(UIScreen.main.bounds.height) - 160)
        let myCollectionView:UICollectionView = UICollectionView(frame: userListFrame, collectionViewLayout: layout)

        myCollectionView.dataSource = self
        myCollectionView.delegate = self
        myCollectionView.register(LocalizedUserCell.self, forCellWithReuseIdentifier: "userCell")
        myCollectionView.register(GroupChatCell.self, forCellWithReuseIdentifier: "groupCell")
        myCollectionView.backgroundColor = UIColor.white

        addSubview(myCollectionView)
    }

    //Number of Section in User List
    func numberOfSections(in collectionView: UICollectionView) -> Int {
        return 2
    }

    //Lists' Sizes
    func collectionView(_ collectionView: UICollectionView, numberOfItemsInSection section: Int) -> Int {
        return (section == 0) ? 5 : 4
    }

    //Cells content here
    func collectionView(_ collectionView: UICollectionView, cellForItemAt indexPath: IndexPath) -> UICollectionViewCell {

        if indexPath.section == 0 {
            let cell = collectionView.dequeueReusableCell(withReuseIdentifier: "userCell", for: indexPath) as! LocalizedUserCell
            return cell
        }else{
            let cell = collectionView.dequeueReusableCell(withReuseIdentifier: "groupCell", for: indexPath) as! GroupChatCell
            return cell
        }
    }

    required init?(coder aDecoder: NSCoder) {
        fatalError("init(coder:) has not been implemented")
    }
}

也许这很重要 - 我的用户单元格在另一个单元格中。

Answer 1

您不能从 inSide collectionViewCell 进行转场，因为当前 func 需要一个 UIViewController ，请在此处查看我对表格单元格的回答，相同的逻辑 TableCellNavigate