在XCode中排除文件-Swift 4

Question

嗨，我必须排除项目中的一些mp3文件，我尝试了 mySong = mySong.replacingOccurrences(of: "Mr. Blue Sky", with: "")但是在我的表视图中，总是有一个空白的可单击空间播放.mp3。在下面，您可以找到完整的代码。该代码基于通过小组和URL获取信息。仅在此Swift中排除此文件。请帮助我。

import UIKit
import AVFoundation
class viewHappy: UIViewController, UITableViewDelegate,UITableViewDataSource {
    @IBOutlet weak var myTableView2: UITableView!

    func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int
    {
        return songs.count
    }
    func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell
    {
        let cell = UITableViewCell(style: UITableViewCellStyle.default, reuseIdentifier: "cell")
        cell.textLabel?.text = songs[indexPath.row]
        return cell
    }
    func tableView(_ tableView: UITableView, didSelectRowAt indexPath: IndexPath)
    {
        do
        {
            let audioPath = Bundle.main.path(forResource: songs[indexPath.row], ofType: ".mp3")
            try audioPlayer = AVAudioPlayer(contentsOf: NSURL(fileURLWithPath: audioPath!) as URL)
            audioPlayer.play()
            thisSong = indexPath.row
            audioStuffed = true
        }
        catch
        {
            print ("ERROR")
        }
    }
    override func viewDidLoad()
    {
        super.viewDidLoad()
        gettingSongNames()
    }

    override func didReceiveMemoryWarning()
    {
        super.didReceiveMemoryWarning()
    }

    //FUNCTION THAT GETS THE NAME OF THE SONGS
    func gettingSongNames()
    {
        let folderURL = URL(fileURLWithPath:Bundle.main.resourcePath!)
        do
        {
            let happyPath = try FileManager.default.contentsOfDirectory(at: folderURL, includingPropertiesForKeys: nil, options: .skipsHiddenFiles)
            //loop through the found urls
            for happySong in happyPath
            {
                var mySong = happySong.absoluteString
                if mySong.contains(".mp3")
                {
                    let findString = mySong.components(separatedBy: "/")
                    mySong = findString[findString.count-1]
                    mySong = mySong.replacingOccurrences(of: "%20", with: " ")
                    mySong = mySong.replacingOccurrences(of: ".mp3", with: "")
                    songs.append(mySong)
                    print (findString)
                }
            }
            myTableView2.reloadData()
        }
        catch
        {
            print ("ERROR")
        }
        var session = AVAudioSession.sharedInstance()
        do
        {
            try session.setCategory(AVAudioSessionCategoryPlayback)
        }
        catch
        {
        }
    }
}

Answer 1

如果您有歌曲列表，请说…

struct Song {
    let title: String
    let mp3: MP3
}
let songs = [Song(title: "Mr. Blue Sky", mp3: mp3_1),
             Song(title: "Evil Woman", mp3: mp3_2),
             Song(title: "10538 Overture", mp3: mp3_3)]

然后，您可以使用filter…

从列表中删除歌曲

let filteredSongs = songs.filter { $0.title != "Mr. Blue Sky" }

然后在您的表视图委托中，返回filteredSongs.count作为您的numberOfRows