Question

当前结构为

firstViewController-> pushViewController（SecondViewController）

-UIViewController      ->filename :  secondViewController

    -UITableView        


        -UITableViewCell (custom cell)     ->filename :  secondTableViewCell

            -UICollectionView                


                -UICollectionViewCell (custom cell)      ->filename : secondCollectionViewCell

在“ UICollectionView”中完成“ didSelectItemAt”时

我想从UIViewController调用“ popviewcontroller”。

我想将所选项目上的数据传递给firstViewController。

但是我不知道如何

** ViewController **

struct cellStat{
var opened = Bool()
var title = String()
var sectionData = [ItemModel]()
}

//선물 카테고리 리스트 보여주는 모달
class GiftCategoryModalVC: UIViewController {

@IBOutlet weak var tableView: UITableView!

private var categoryTitleModels: [ItemModel] = []
private var giftItemModels: [ItemModel] = []
private var titleCellData: [cellStat] = []

//LIFE CYCLE
override func viewDidLoad() {
    super.viewDidLoad()

    tableView.delegate = self
    tableView.dataSource = self
    tableView.register(UINib(nibName: GiftCategoryTBCell.reusableIdentifier, bundle: nil), forCellReuseIdentifier: GiftCategoryTBCell.reusableIdentifier)
    tableView.register(UINib(nibName: GiftCategoryListTBCell.reusableIdentifier, bundle: nil), forCellReuseIdentifier: GiftCategoryListTBCell.reusableIdentifier)

    //get gift categofy title
    GiftPageAPIService.shared.selectCode(code: "CD005") { (itemModels) in
        self.categoryTitleModels = itemModels
        itemModels.forEach { (itemModel) in
            self.titleCellData.append(cellStat(opened: false, title: itemModel.codeNm!, sectionData: []))
        }
        self.tableView.reloadData()
    }
    setupLayout()
}

//LAYOUT
fileprivate func setupLayout(){
    setNavbar()
}

fileprivate func setNavbar(){
    self.navigationItem.leftBarButtonItem = UIBarButtonItem(image: #imageLiteral(resourceName: "icon_arrow_left"), style: UIBarButtonItemStyle.plain, target: self, action: #selector(handleEndButton))
    self.navigationController?.navigationBar.barTintColor = UIColor.init(hex: 0xececec)
    self.navigationController?.navigationBar.tintColor = UIColor.init(hex: 0x979797)
}


//MAKR:- ACTION
@objc func handleEndButton(){
    self.navigationController?.popViewController(animated: true)
}

}




extension GiftCategoryModalVC: UITableViewDelegate, UITableViewDataSource{
func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
    if titleCellData[section].opened == true{
        return 2
    }else{
        return 1
    }
}

func numberOfSections(in tableView: UITableView) -> Int {
    return titleCellData.count
}

func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
    if indexPath.row == 0{
        let cell = tableView.dequeueReusableCell(withIdentifier: GiftCategoryTBCell.reusableIdentifier, for: indexPath) as! GiftCategoryTBCell
        cell.setCategotyNm = categoryTitleModels[indexPath.section].codeNm

        if titleCellData[indexPath.section].opened == true{
            cell.setImgView = UIImage(named: "arrow_up")
        }else{
            cell.setImgView = UIImage(named: "arrow_down")
        }
        return cell
    }else{
//this cell is call tableCell
        let cell = tableView.dequeueReusableCell(withIdentifier: GiftCategoryListTBCell.reusableIdentifier, for: indexPath) as! GiftCategoryListTBCell
        cell.setItems = titleCellData[indexPath.section].sectionData

        return cell
    }
}

func tableView(_ tableView: UITableView, didSelectRowAt indexPath: IndexPath) {
    if indexPath.row == 0{
        if titleCellData[indexPath.section].opened == true{
            titleCellData[indexPath.section].opened = false
            let sections = IndexSet.init(integer: indexPath.section)
            tableView.reloadSections(sections, with: .automatic)
        }else{
            titleCellData[indexPath.section].opened = true
            GiftPageAPIService.shared.selectCode(code: categoryTitleModels[indexPath.section].codeCd!) { (items) in

                self.titleCellData[indexPath.section].sectionData = items
                let sections = IndexSet.init(integer: indexPath.section)
                tableView.reloadSections(sections, with: .automatic)
            }
        }
    }
}

func tableView(_ tableView: UITableView, heightForRowAt indexPath: IndexPath) -> CGFloat {
    if indexPath.row == 0{
        return 50
    }else{
        let cellHeight: Int = (titleCellData[indexPath.section].sectionData.count + 2) / 3
        return self.view.frame.height * 0.24 * CGFloat(cellHeight)
    }
}
}

** TableViewCell **

class GiftCategoryListTBCell: UITableViewCell {

@IBOutlet weak var collectionView: UICollectionView!
var items: [ItemModel]?
var category: ItemModel?

var setCategory: ItemModel?{
    didSet{
        self.category = setCategory!
        getCategoryData()
    }
}

var setItems: [ItemModel]?{
    didSet{
        self.items = setItems!
        collectionView.reloadData()
    }
}


let flowlayout = UICollectionViewFlowLayout()
override func awakeFromNib() {
    super.awakeFromNib()

    collectionView.delegate = self
    collectionView.dataSource = self
    collectionView.register(UINib(nibName: GiftItemCVCell.reusableIdentifier, bundle: nil), forCellWithReuseIdentifier: GiftItemCVCell.reusableIdentifier)

    setupLayout()

}

override func setSelected(_ selected: Bool, animated: Bool) {
    super.setSelected(selected, animated: animated)
}

//MARK:- LAYOUT
fileprivate func setupLayout(){
    collectionView.backgroundColor = UIColor.init(hex: 0xf7f7f7)
    collectionView.isScrollEnabled = false
}

fileprivate func getCategoryData(){
    GiftPageAPIService.shared.selectCode(code: (category?.codeCd)!) { (items) in
        self.items = items
        self.collectionView.reloadData()
    }
}

}


extension GiftCategoryListTBCell: UICollectionViewDataSource,UICollectionViewDelegate{
func collectionView(_ collectionView: UICollectionView, numberOfItemsInSection section: Int) -> Int {
    if items == nil{
        return 0
    }else{
        return (items?.count)!
    }
}

func collectionView(_ collectionView: UICollectionView, cellForItemAt indexPath: IndexPath) -> UICollectionViewCell {
    let cell = collectionView.dequeueReusableCell(withReuseIdentifier: GiftItemCVCell.reusableIdentifier, for: indexPath) as! GiftItemCVCell
    cell.setItem = items?[indexPath.item]
    return cell
}

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

        I tried to do the work here.

    */
}
}


extension GiftCategoryListTBCell: UICollectionViewDelegateFlowLayout{
func collectionView(_ collectionView: UICollectionView, layout collectionViewLayout: UICollectionViewLayout, insetForSectionAt section: Int) -> UIEdgeInsets {
    return UIEdgeInsets(top: contentView.frame.width * 0.07, left: contentView.frame.width * 0.07, bottom: contentView.frame.width * 0.07, right: contentView.frame.width * 0.07)
}

func collectionView(_ collectionView: UICollectionView, layout collectionViewLayout: UICollectionViewLayout, minimumLineSpacingForSectionAt section: Int) -> CGFloat {
    return contentView.frame.width * 0.03
}

func collectionView(_ collectionView: UICollectionView, layout collectionViewLayout: UICollectionViewLayout, sizeForItemAt indexPath: IndexPath) -> CGSize {
    let width = (contentView.frame.width) * 0.25
    return CGSize(width: width, height: width * 1.5)
}

}

Answer 1

尝试：

let window = UIApplication.shared.keyWindow

window?.topMostWindowController?.navigationController?.popViewController(animated: true)

Answer 2

您的意思是这样的吗？

在tableviewcell文件中创建协议

class myTableCell: UITableViewCell{
    var myString = "mystring"
    var delegate = myNewDelegate?

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

        delegate?.didSelect(text: self.myString)
    } 

}


protocol myNewDelegate {
   func didSelect(text: String)
}

这进入表单元格所在的视图控制器类。

class MyTableViewController: UITableViewController, myNewDelegate{

    var stringToPass = String()

    func didSelectText(text: String){
        stringToPass = text
        self.performSegue(withIdentifier: "editProfileSegue", sender: self)
    }

    override func prepare(for segue: UIStoryboardSegue, sender: Any?) {
      if segue.identifier == "editProfileSegue"{
         let viewcontroller = segue.destination as! FirstViewController

         viewcontroller.myPassedString = self.stringToPass

        }
    }
}

然后标识接收类

class FirstViewController: UIViewController{
    var myPassedString = String()
}

Answer 3

我明白你的意思。

如果要将控制器弹出到表单元格中的前一个控制器只是为了获取控制单元格并尝试弹出的viewcontroller，并且尝试使用此方法，为什么不在视图控制器中覆盖委托func？可能有点难阅读代码，但很有用，您可以使用

self.navigationcontroller?.popViewController

如果您已经使用viewcontroller委托另一个表视图，只需在委托函数中判断表视图名称

func tableView(_ tableView: UITableView, didSelectRowAt indexPath: IndexPath) {
     if tableView == blah blah 
     {
           do what you want
     }
}

如果您需要在不同的viewController之间传递数据，尤其是将数据传递给pre-viewController，则需要编写委托，或者需要__block回调。

如何在UITableViewCell中调用popviewcontroller

3 个答案: