ios - 单击单元格中的按钮时如何解析以播放某首歌曲？

Question

当我播放歌曲时，它会记录在我的应用程序中。歌曲标题、艺术家等列在单元格中。每次我转到下一首歌曲时，都会添加一个新单元格。目前，每个单元格中都列出了标题和艺术家以及一个按钮。每当我单击该按钮时，我的程序都会检查该歌曲是否正在解析，如果是，它将播放该文件。 IE。如果选择歌曲a，它将检查歌曲a是否在解析中，如果是，它将播放该文件，与歌曲b相同，但如果我返回并单击第一首歌曲的播放按钮，它将播放第二首歌曲。如何让每个单元格中的每个按钮播放该单元格中相应的歌曲？

func playit(sender: UIButton!){
    if let nowPlaying = musicPlayer.nowPlayingItem{
    let title = nowPlaying[MPMediaItemPropertyTitle] as? String
    let artist = nowPlaying[MPMediaItemPropertyTitle] as? String

    println(title! + artist!)


        let query = PFQuery(className: "Songs")
        query.whereKey("SongName", equalTo: title!)
        query.findObjectsInBackgroundWithBlock {
            (objects: [AnyObject]?, error: NSError?) -> Void in
            if error == nil {
                // The find succeeded.
                println("Successfully retrieved \(objects!.count) song(s).")
                // Do something with the found objects
                if let objects = objects as? [PFObject] {
                    for object in objects {
                        println(object.objectId)
                        let playButtonrow = sender.tag
                        let object = object as PFObject
                        let parseAudio = object.valueForKey("SongFile") as! PFFile
                        let audioPath: String = parseAudio.url!
                        let urlParse: NSURL = NSURL(string: audioPath)!



                        player = AVPlayer(URL: urlParse)
                        println(player)
                        player.volume = 1.0
                        player.play()
                        if (player.rate > 0) && (player.error == nil) {
                            // player is playing
                            println("Playing")
                        } else {
                            println("Not Playing")
                        }
                    }
                }
            } else {
                // Log details of the failure
                println("Error: \(error!) \(error!.userInfo!)")
            }

        }

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

    let cell: UITableViewCell = self.table.dequeueReusableCellWithIdentifier("cell") as! UITableViewCell
    var play: Play


    play = add[indexPath.row]
    let playButton : UIButton = UIButton.buttonWithType(UIButtonType.Custom) as! UIButton
    playButton.tag = indexPath.row
    let imageret = "playbutton"
    playButton.setImage(UIImage(named: imageret), forState: .Normal)
    playButton.frame = CGRectMake(236, 20, 100, 100)
    playButton.addTarget(self,action: "playit:", forControlEvents: UIControlEvents.TouchUpInside)

    for view: UIView in cell.contentView.subviews as! Array<UIView> {
        view.removeFromSuperview()
    }
    cell.contentView.addSubview(playButton)

Answer 1

听起来问题出在您的表格 View 和单元格的重复使用中。您如何确定按钮按下与哪个单元格索引相关联？

看看这个。 Detecting which UIButton was pressed in a UITableView