AVplayer 不播放 iPhone 库中的视频

Posted 2023-02-23

【中文标题】AVplayer 不播放 iPhone 库中的视频

【英文标题】：AVplayer not playing video from iPhone gallery

【发布时间】：2019-04-09 14:47:22

【问题描述】：

所以，这段代码在我之前在 iPhone 5s 上测试过的项目中运行良好，但是当我将它嵌入到我的主项目中时它不起作用，它从图库中选择视频，显示播放器，但一直在搜索视频——（赢了't play it），只有黑色的播放器屏幕，下方有搜索指示器和暂停按钮控件等。

我在输出窗口中得到的唯一错误是：

[1524:458877] 发现扩展时遇到 [discovery] 错误：Error Domain=PlugInKit Code=13 "query cancelled" UserInfo=NSLocalizedDescription=query cancelled

搜索了很多，并从 Apple 论坛上的一个答案中得出结论，它不会影响任何事情，最好被忽略。

import UIKit
import AVKit
import AVFoundation

class GalleryVideoSelectorViewController: UIViewController,UIImagePickerControllerDelegate,UINavigationControllerDelegate 

let ipc = UIImagePickerController()

override func viewDidLoad() 
    super.viewDidLoad()
    ipc.delegate=self


@IBAction func SelectVideo(_ sender: Any) 
    ipc.sourceType = .photoLibrary

    ipc.mediaTypes = ["public.movie"]
    present(ipc,animated:true,completion: nil)


@IBAction func PlayBackVideo(_ sender: Any) 
    if let videoURL = UserDefaults.standard.url(forKey: "LullabyURL") 
        let player = AVPlayer(url: videoURL)
        let playerViewController = AVPlayerViewController()
        playerViewController.player = player
        self.present(playerViewController,animated:true)
        
            playerViewController.player!.play()
        
    

@objc func imagePickerController(_ picker:UIImagePickerController, didFinishPickingMediaWithInfo info:[String:Any])

    ipc.dismiss(animated:true)

        var videourl = info["UIImagePickerControllerReferenceURL"] as? URL
        if let videoURL = videourl

            defaults.set(videoURL,forKey: "LullabyURL")
            let player = AVPlayer(url:videourl!)
            print (videourl!)
            let playerViewController = AVPlayerViewController()
            playerViewController.player = player
            self.present(playerViewController,animated:true)
            
                playerViewController.player!.play()
            

        

    

【参考方案1】：

这是我的委托的更新版本，实际上是导致问题的原因。

@objc func imagePickerController(_ picker:UIImagePickerController, didFinishPickingMediaWithInfo info:[UIImagePickerController.InfoKey:Any])

    ipc.dismiss(animated:true)
       let videourl = info[UIImagePickerController.InfoKey.mediaURL] as! URL
            UserDefaults.standard.set(videourl,forKey: "LullabyURL")
            let player = AVPlayer(url: videourl)
            let playerViewController = AVPlayerViewController()
            playerViewController.player = player
            self.present(playerViewController,animated:true)
            
                playerViewController.player!.play()
            
    

将“didFinishPickingMediaWithInfo 信息：[UIImagePickerController.InfoKey:Any]”更改为“didFinishPickingMediaWithInfo 信息：[UIImagePickerController.InfoKey:Any]”

和 视频 URL 从 "let videourl = info["UIImagePickerControllerReferenceURL"] as?URL" 到 "let videourl = info[UIImagePickerController.InfoKey.mediaURL] as!URL"