无法停止 AVPlayer

Question

我目前正在使用 Swift 测试 AVPlayer 与音频流的使用 url。有 play() and pause() 方法，但问题是，仅暂停时，流仍然缓存在设备中。

这是我的测试代码：

import UIKit
import AVFoundation

class ViewController: UIViewController {

    let player = AVPlayer(URL: NSURL(string: "http://streaming.radio.rtl.fr/rtl-1-48-192")!)

    @IBOutlet weak var btnPlay: UIButton!

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

    @IBAction func btnPress(sender: AnyObject) {
        if (btnPlay.titleLabel?.text == "Play") {
            initPlayer()
            btnPlay.setTitle("Stop", forState: UIControlState.Normal)
        } else {
            stopPlayer()
            btnPlay.setTitle("Play", forState: UIControlState.Normal)
        }
    }

    func initPlayer()  {
        player.play()
    }

    func stopPlayer() {
        // player.currentItem = nil // Last thing I tried, but generate an error
        player.pause()
    }
}

以下是尝试时遇到的问题：

player = nil : "Cannot assign a value of type 'NilLiteralCOnvertible' to a value of type 'AVPlayer'"

player.currentItem = nil : "Cannot assign to property: 'currentItem' is a get-only property"

我尝试了所有方法，甚至 AVQueuePlayer 都没有任何有效结果。（显然，因为我的箱子里只有一件物品）。

如何停止AVPlayer或销毁他的实例？

Answer 1

如果将 player 声明为可选变量，则可以将播放器设置为 nil 以释放它。

愚蠢的例子，但它显示了会发生什么：

import UIKit
import AVFoundation

class ViewController: UIViewController {

    @IBOutlet weak var btnPlay: UIButton!

    var player:AVPlayer?

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

    @IBAction func btnPress(sender: AnyObject) {
        if (btnPlay.titleLabel?.text == "Play") {
            initPlayer()
            btnPlay.setTitle("Stop", forState: UIControlState.Normal)
        } else {
            stopPlayer()
            btnPlay.setTitle("Play", forState: UIControlState.Normal)
        }
    }

    func initPlayer()  {
        if let play = player {
            print("playing")
            play.play()
        } else {
            print("player allocated")
            player = AVPlayer(URL: NSURL(string: "http://streaming.radio.rtl.fr/rtl-1-48-192")!)
            print("playing")
            player!.play()
        }
    }

    func stopPlayer() {
        if let play = player {
            print("stopped")
            play.pause()
            player = nil
            print("player deallocated")
        } else {
            print("player was already deallocated")
        }
    }
}

Answer 2

从这个post我找到了在您离开或开始新播放器之前完全停止 AVPlayer 的最佳解决方案：

videoPlayer.replaceCurrentItemWithPlayerItem(nil)

[更新] 对于 SWIFT 3:

player.replaceCurrentItem(with: nil)

Answer 3

SWIFT 3 版本:

player.replaceCurrentItem(with: nil)

无法停止 AVPlayer

Impossible to stop AVPlayer

ios

avplayer

swift