无法阻止AVPlayer

Question

我目前正在使用Swift测试AVPlayer与音频流网址的使用.有play()和pause()方法,但问题是,仅暂停,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()
    }
}

以下是尝试某些事情时的问题:

player = nil :"无法将类型'NilLiteralCOnvertible'的值分配给'AVPlayer'类型的值"

player.currentItem = nil :"无法分配给属性:'currentItem'是一个只获取属性"

---

我尝试了一切,甚至通过AVQueuePlayer没有任何有效的结果.(显然,因为我的情况只有一个项目).

如何阻止AVPlayer或销毁他的实例？

Answer 1

从这篇文章中我发现了在离开或开始新玩家之前完全停止AVPlayer的最佳解决方案:

videoPlayer.replaceCurrentItemWithPlayerItem(nil)

Answer 2

如果声明player为可选变量,则可以将播放器设置nil为取消分配.

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 3

SWIFT 3 版本：

player.replaceCurrentItem(with: nil)