在Swift中使用Audio Player更改UITableView中按钮单元格的播放暂停状态

You can just save in a property the index of the current playing cell (let's call it X). Than, on tap of that button from another cell (let's call it Y) you can:

• Change the icon on cell X
• Play the Y content

That will cause the state change again, this time for cell Y, so you will change the icon of cell Y.

As a side note I want to warn you that probably you should save the state of all cells in some sort of data structure (like an array) and then use that to dequeue cells in cellForRowAtIndexPath, otherwise you could get into some issue when cells start to be more than what you can see in the screen. I don't know if you did that already, but wanted to avoid you from ending up in some other trouble later.

EDIT:

假设controller.player.currentIndex是正在播放的单元格的（可选）索引，则看起来像这样：

    func configurePlaylistCell (tableView: UITableView, cell: PlaylistCell, controller: AudioController, indexPath: IndexPath){

    cell.playPauseButton.tag = indexPath.row + 100

    cell.playButtonPressed = { [weak self] (sender: UIButton) in
        self?.indexPathForCell = IndexPath(row: sender.tag - 100 , section: 0)
        if !controller.audioSessionController.audioSessionIsActive {
            try? controller.audioSessionController.activateSession()
        }

        print (controller.player.currentIndex)

        if let item = controller.player.currentItem {
            if let index = controller.player.currentIndex, let cell = tableView.cellForRow(at: IndexPath(row: index, section: YOUR_SECTION_FOR_LANGUAGE_CELL)) as! AppSettingViewCell {
               cell.playButton.image = UIImage(named: "IMAGE NAME") 
            }
            if (indexPath.row == 0) {
            try? controller.player.load(item: item, playWhenReady: true)
            }else {
                try? controller.player.jumpToItem(atIndex: sender.tag - 100, playWhenReady: true)
            }
        }
        else {
            controller.player.togglePlaying()
        }
    }
}