ios - 如何在 MPMusicplayerController 上播放歌曲 URL？

Question

所以我想使用它的 url 使用 MPMusicPlayer 播放歌曲。我已经能够将音乐信息从 MPMediaCollection 填充到 UITableView。我想要做的是，当我点击 tableview 行时，它会播放 tableview 行中具有相同标题的歌曲。

这是我如何填充音乐信息的代码

func mediaPicker(mediaPicker: MPMediaPickerController!,

    didPickMediaItems mediaItemCollection: MPMediaItemCollection!){



        for thisItem in mediaItemCollection!.items as! [MPMediaItem]{



            var mediaitem = mediaItemCollection!.items



            playlistItem = ["music" : mediaitem]

            playlistItemArray.addObject(playlistItem!)



            let itemUrl = thisItem.valueForProperty(MPMediaItemPropertyAssetURL)

                as? NSURL



            let itemTitle =

            thisItem.valueForProperty(MPMediaItemPropertyTitle)

                as? String



            let itemArtist =

            thisItem.valueForProperty(MPMediaItemPropertyArtist)

                as? String



            var itemArtwork: AnyObject! = thisItem.valueForProperty(MPMediaItemPropertyArtwork)

            if (itemArtwork != nil) {

                var listArtwork = itemArtwork.imageWithSize(CGSizeMake (198, 198))

                var listArtworkData = UIImagePNGRepresentation(listArtwork)



                playlistArtwork = ["picture" : listArtworkData]

                playlistArtworkImage.addObject(playlistArtwork!)

            }else{

                var listNulArtwork = UIImage(named: "noArtworkImage.png")

                var listNulArtworkData = UIImagePNGRepresentation(listNulArtwork)

                playlistArtwork = ["picture" : listNulArtworkData]

                playlistArtworkImage.addObject(playlistArtwork!)

            }



            playlist = ["title" : itemTitle! , "artist" : itemArtist! , "songUrl" : itemUrl!]

            playlistArray.addObject(playlist!)



        }



}

这是代码，我如何将数据填充到 tableview

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


    let cell = tableView.dequeueReusableCellWithIdentifier("playlistCell", forIndexPath: indexPath) as! UITableViewCell

    let object = User.playList[indexPath.row] as! NSDictionary
    let artworkObject =  User.playlistArt[indexPath.row] as! NSDictionary

    let base64String = artworkObject["picture"]!.base64EncodedStringWithOptions(.allZeros)

    let decodedData = NSData(base64EncodedString: base64String, options: NSDataBase64DecodingOptions(rawValue: 0))
    var decodedimage = UIImage(data: decodedData!)

    (cell.contentView.viewWithTag(1) as! UIImageView).image = decodedimage
    //(cell.contentView.viewWithTag(1) as! UIImageView).image = image.timelinecircleMask
    (cell.contentView.viewWithTag(2) as! UILabel).text = object["title"] as? String
    (cell.contentView.viewWithTag(3) as! UILabel).text = object["artist"] as? String

    return cell
}

这是我的播放列表表格 View 的屏幕截图

我从 MPMediaCollection 得到的是 mpmediaitem 和歌曲信息(标题、艺术家、url)的字典

点击 uitableview 行时如何播放歌曲？

Answer 1

所以，是的，我已经自己解决了这个问题。其实很简单

我做的第一件事是:

declare MPMediaItemcollection as a global variable(put in a struct)

然后:

func tableView(tableView: UITableView, didSelectRowAtIndexPath indexPath: NSIndexPath) {
    tableView.deselectRowAtIndexPath(indexPath, animated: false)

    var mediaItemCollection = User.mdci
    MPMusicPlayerController().nowPlayingItem = mediaItemCollection!.items[indexPath.row] as! MPMediaItem
    MPMusicPlayerController().play()

    getPlayingSongInfo()

}

就这样