从 Swift 3 中的 API 获取 AVPlayer 中的视频

Posted 2023-03-15

【中文标题】从 Swift 3 中的 API 获取 AVPlayer 中的视频

【英文标题】：Fetch video in AVPlayer from API in Swift 3

【发布时间】：2017-08-09 18:01:01

【问题描述】：

我可以在 AVPlayer 中运行本地视频。但我无法在 swift 3 中从 JSON 获取视频。我搜索了它，但在 Swift 3 中找不到合适的解决方案。如何在 Swift 3 中从 JSON 获取视频？我是 Swift 的初学者。

我有 JSON：

 
 "status": "Success",
 "course_summary": "<p>Laravel is one of the most popular php frameworks </p>",
 "course_video": "course.mkv"

代码：

import UIKit
import AVFoundation
import AVKit
import Alamofire

class CourseSchedule: UIViewController 

var playerController = AVPlayerViewController()
var player:AVPlayer?
var dictDataContent:NSDictionary = NSDictionary()
var strd : NSString?
var dictData:NSArray = NSArray()
var appDictionary: String?

@IBOutlet weak var courseSummary: UITextView!
@IBOutlet var button: UIButton!
@IBOutlet var videoPreviewLayer: UIView!

  override func viewDidLoad() 
    super.viewDidLoad()

    let def = self.dictDataContent.value(forKey: "course_summary") as! String!
    let htmlData = NSString(string: def!).data(using: String.Encoding.unicode.rawValue)
    let attributedString = try! NSAttributedString(data: htmlData!, options: [NSDocumentTypeDocumentAttribute: NSHTMLTextDocumentType], documentAttributes: nil)

    courseSummary.attributedText = attributedString
    courseSummary.textColor = UIColor.white
    courseSummary.font = UIFont(name: "Palatino", size: 14)


    //For local video to play in AVPlayer.

    let videoString = Bundle.main.path(forResource: "Working-Space", ofType: ".mp4")
    if let path = videoString 
        let url = NSURL(fileURLWithPath: path)
        let item = AVPlayerItem(url: url as URL)
        self.player = AVPlayer(playerItem: item)
        self.playerController = AVPlayerViewController()
        self.playerController.player = self.player
        playerController.view.frame = videoPreviewLayer.frame
        self.addChildViewController(playerController)
        self.videoPreviewLayer.addSubview(playerController.view)
        playerController.showsPlaybackControls = false
        self.playerController.player?.play()
    
    NotificationCenter.default.addObserver(forName: .AVPlayerItemDidPlayToEndTime, object: self.player?.currentItem, queue: nil, using:  (_) in
        DispatchQueue.main.async 
            self.player?.seek(to: kCMTimeZero)
            self.player?.play()
        
    )
    button.layer.cornerRadius = 5
  





//HOMEVC

import UIKit
import Alamofire


class HomeVC: UIViewController 


@IBOutlet var test: UIView!
var strid : NSString?
var strd : NSString?
var dictData:NSDictionary = NSDictionary()
var strd2 : NSString?

override func viewDidLoad() 
    super.viewDidLoad()        
    self.setupPages()
  


func setupPages() 
    let storyboard = UIStoryboard(name: "Main", bundle: nil)
    var controllerArray: [UIViewController] = []
    let strinDuration:NSString = NSString(format:"http://rillmark.academy/api/rillmark-academy/course/course-content-detail?id=%@",strid!) as String as String as NSString
    print("strid",strid!)
    let collectionviewone: String = strinDuration as String
    Alamofire.request(collectionviewone, method: .get, parameters: nil, encoding: JSONEncoding.default)
        .responseJSON  response in
            debugPrint(response.result)
            if let JSON = response.result.value
               self.dictData = (JSON as AnyObject) as! NSDictionary
                print("self.dictData",self.dictData)
                let firstVC = storyboard.instantiateViewController(withIdentifier: "CourseContentTable") as! CourseContentTable
                firstVC.title = "Course Content"
                firstVC.dictDataContent = self.dictData
      

【参考方案1】：

如果您使用的是 JSON，您实际上不会发送视频。 JSON 本质上是 Key:Value 数据。您可以让 JSON 发送视频数据或下载视频的链接。但是目前看起来你有：

"course_video":"course.mkv"

换句话说，你有类型：

String:String

我建议通过 json 传递一个链接，然后下载相应的视频。看看Alamofire，它非常适合 HTTP 请求和处理您的下载。获得视频数据后，您可以使用 AVPlayer 进行播放。

【讨论】：

现在，我也包含了下一个视图控制器的内容。在这里，我使用 Alamofire 获取 API。我在上面写的关于视频的 JSON 是虚拟的。那是出于隐私考虑。现在，我的问题是如何在 Swift 3 中使用 AVPlayer 播放该视频？