[英]How to stop song when click again on table view and play another song when click another cell
[英]How do I get parse to play a certain song when a button in the cell is clicked?
當我播放歌曲時,它會記錄在我的應用程序中。 歌曲名稱、藝術家等列在一個單元格中。 每次我轉到下一首歌曲時,都會添加一個新單元格。 目前在每個單元格中都列出了標題和藝術家以及一個按鈕。 每當我單擊按鈕時,我的程序都會檢查該歌曲是否在解析中,如果是,它將播放該文件。 即,如果選擇歌曲 a,它將檢查歌曲 a 是否在解析中,如果是,它將播放該文件,與歌曲 b 相同,但如果我返回並單擊第一首歌曲的播放按鈕,它將播放第二首歌曲。 如何讓每個單元格中的每個按鈕播放該單元格中的相應歌曲?
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)
聽起來問題出在您的表格視圖和單元格的重用中。 您如何確定按下的按鈕與哪個單元格索引相關聯?
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