AVAssetResourceLoaderDelegate和HLS不工作吗？

Question

对我来说，它没有在模拟器和真实设备(iPhone 5S)上使用“iPhone”url。同时，苹果的演示运行良好，但我看不出有什么不同。对于其他url扩展，也可以(例如，url末尾的"m3u9“)。

import UIKit
import AVKit
import AVFoundation

class ViewController: UIViewController, AVAssetResourceLoaderDelegate {

    override func viewDidLoad() {
        super.viewDidLoad()

        // if I change m3u8 to different file extension, it's working good
        let url = NSURL(string: "cplp://devimages.apple.com/iphone/samples/bipbop/bipbopall.m3u8") 

        let asset = AVURLAsset(URL: url!, options: nil)
        asset.resourceLoader.setDelegate(self, queue: dispatch_queue_create("AVARLDelegateDemo loader", nil))

        let item = AVPlayerItem(asset: asset)
        let player = AVPlayer(playerItem: item)
        player.play()
    }

    func resourceLoader(resourceLoader: AVAssetResourceLoader, shouldWaitForLoadingOfRequestedResource loadingRequest: AVAssetResourceLoadingRequest) -> Bool {

        NSLog("This method is never called in case of m3u8 url")

        return true
    }
}

Answer 1

好的，我已经找到了如何修复它，但仍然不明白为什么它只发生在"m3u8“链接。

需要保存强player或至少保存item引用。谢谢你，苹果，给我这些文件。*讽刺：

import UIKit
import AVKit
import AVFoundation

class ViewController: UIViewController, AVAssetResourceLoaderDelegate {
    var player: AVPlayer! // <-- the fix

    override func viewDidLoad() {
        super.viewDidLoad()

        // if I change m3u8 to different file extension, it's working good
        let url = NSURL(string: "cplp://devimages.apple.com/iphone/samples/bipbop/bipbopall.m3u8") 

        let asset = AVURLAsset(URL: url!, options: nil)
        asset.resourceLoader.setDelegate(self, queue: dispatch_queue_create("AVARLDelegateDemo loader", nil))

        let item = AVPlayerItem(asset: asset)
        player = AVPlayer(playerItem: item) // <-- the fix
        player.play()
    }

    func resourceLoader(resourceLoader: AVAssetResourceLoader, shouldWaitForLoadingOfRequestedResource loadingRequest: AVAssetResourceLoadingRequest) -> Bool {

        NSLog("This method is never called in case of m3u8 url")

        return true
    }
}