ios - 将值从 UITableViewCell 传递到详细信息 View

Question

就像我筛选过的其他一些帖子一样，这是我说我是 Swift 新手的部分。我有一个应用程序，可以让你为你最喜欢的电影存储图像和数据(通过 Core Data)。这部分工作正常。我可以创建一个新帖子并通过我的 tableViewCell 查看它。我遇到问题的部分是，它在点击单元格后在详细信息页面上显示图像和数据。

我已经阅读了有关该主题的其他帖子和文章，我很确定我需要使用 didSelectRowAtIndexPath 和 prepareForSegue，但我只是不明白什么我应该添加以及如何添加。部分问题在于 Swift 是新的。有关详细信息和我的代码，请参见下文。如果您需要更多详细信息，请告诉我。任何帮助将不胜感激。如果您知道的话，还希望链接到有关该主题的一些有用的阅读 Material 。除了下面的文件，我还有一个用于创建帖子的文件 (PostMovieVC.swift) 和一个用于我的自定义单元格的文件 (MovieCell.swift)。

ViewController.swift

import UIKit
import CoreData

class ViewController: UIViewController, UITableViewDataSource, UITableViewDelegate {

@IBOutlet weak var tableView: UITableView!
var movies = [Movie]()

var storeMovieTitle: String!

override func viewDidLoad() {
    super.viewDidLoad()

    tableView.delegate = self
    tableView.dataSource = self
}

override func viewDidAppear(animated: Bool) {
    fetchAndSetResults()
    tableView.reloadData()
}

func fetchAndSetResults() {
    let app = UIApplication.sharedApplication().delegate as! AppDelegate
    let context = app.managedObjectContext
    let fetchRequest = NSFetchRequest(entityName: "Movie")

    do {
        let results = try context.executeFetchRequest(fetchRequest)
        self.movies = results as! [Movie]
    } catch let err as NSError {
        print(err.debugDescription)
    }
}

func numberOfSectionsInTableView(tableView: UITableView) -> Int {
    return 1
}

func tableView(tableView: UITableView, cellForRowAtIndexPath indexPath: NSIndexPath) -> UITableViewCell {

    if let cell = tableView.dequeueReusableCellWithIdentifier("MovieCell") as? MovieCell {

        let movie = movies[indexPath.row]
        cell.configureCell(movie)
        return cell
    } else {
        return MovieCell()
    }
}

func tableView(tableView: UITableView, didSelectRowAtIndexPath indexPath: NSIndexPath) {
    let movie = movies[indexPath.row]

}

override func prepareForSegue(segue: UIStoryboardSegue, sender: AnyObject?) {
    if segue.identifier == "ShowMovieDetail" {
        let detailsVC = segue.destinationViewController as! MovieDetailsVC
        let indexPath = tableView.indexPathForSelectedRow!
        let movie = movies[indexPath.row]
        detailsVC.passedTitle = storeMovieTitle

    }
}

func tableView(tableView: UITableView, heightForRowAtIndexPath indexPath: NSIndexPath) -> CGFloat {
    return 169.0
}

func tableView(tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
    return movies.count
}

}

MovieDetailsVC.swift

import UIKit
import CoreData

class MovieDetailsVC: UIViewController {

@IBOutlet weak var showMovieImg: UIImageView!
@IBOutlet weak var showTitleLbl: UILabel!
@IBOutlet weak var showSeenWithLbl: UILabel!
@IBOutlet weak var showQuoteLbl: UILabel!
@IBOutlet weak var showLinkLbl: UILabel!

var passedMovieImg: UIImageView!
var passedTitle: String?
var passedSeenWith: String?
var passedQuote: String?
var passedLink: String?

override func viewDidLoad() {
    super.viewDidLoad()

}

override func viewWillAppear(animated: Bool) {

    showMovieImg.image = passedMovieImg
    showTitleLbl.text = passedTitle
    showSeenWithLbl.text = passedSeenWith
    showQuoteLbl.text = passedQuote
    showLinkLbl.text = passedLink

}

@IBAction func closeBtnTapped(sender: AnyObject) {

    dismissViewControllerAnimated(true, completion: nil)

}

}

Answer 1

我的问题已通过如下更新代码得到解决:

更新 prepareForSegue 函数如下:

    override func prepareForSegue(segue: UIStoryboardSegue, sender: AnyObject?) {
    // get the segue identifier
    if segue.identifier == "ShowMovieDetail" {
        // get a reference for the destination view controller and the selected cell indexPath
        if let MovieDetailsVC = segue.destinationViewController as? MovieDetailsVC, let indexPath = tableView.indexPathForSelectedRow {


            let movie = movies[indexPath.row]
            MovieDetailsVC.movie = movie
        }

    }
}

从 MovieDetailsVC 中删除了以下代码:

    var passedMovieImg: UIImageView!
    var passedTitle: String?
    var passedSeenWith: String?
    var passedQuote: String?
    var passedLink: String?

将上面的替换为:

    var movie: Movie?

更新后的 viewWillAppear 如下:

    override func viewWillAppear(animated: Bool) {

       showMovieImg.image = movie?.getMovieImg()
       showTitleLbl.text = movie!.title
       showSeenWithLbl.text = movie!.seenwith
       showQuoteLbl.text = movie!.quote
       showLinkLbl.text = movie!.trailer

    }