如何在 iOS 中播放循环视频？

Question

如何将视频剪辑放入故事板？我只看到：

另外，.mp4 文件应该放在哪里？

最后，当视图控制器启动时，为循环视频剪辑包含的正确代码是什么。

 //insert looping video clip here

我熟悉 Android Studio/java 并且可以毫无问题地做到这一点。但是，我对 swift 和 Xcode 很陌生，所以我遇到了麻烦。

Answer 1

制作循环视频:-

将 UIView 添加到您的 ViewController，相应地设置约束。

在符合要求的 class

中将 UIView 声明为 @IBOutlet

    @IBOutlet weak var videoView : VideoPlay!
    //Where VideoPlay is a CustomClass for the Video player

为视频播放器创建自定义 Class UIVew : VideoPlay

import UIKit
import AVFoundation



class VideoPlay: UIView {

     private var player : AVPlayer!

      private var playerLayer : AVPlayerLayer!

    init() {

             super.init(frame: CGRectZero)
              self.initializePlayerLayer()

          }

          override init(frame: CGRect) {
              super.init(frame: frame)
              self.initializePlayerLayer()
              self.autoresizesSubviews = false
          }

          required init?(coder aDecoder: NSCoder) {
              super.init(coder: aDecoder)
              self.initializePlayerLayer()

          }


          private func initializePlayerLayer() {

              playerLayer = AVPlayerLayer()
              playerLayer.backgroundColor = UIColor.whiteColor().CGColor
              playerLayer.videoGravity = AVLayerVideoGravityResizeAspectFill

              self.layer.addSublayer(playerLayer)
              playerLayer.frame = self.bounds
          }

          func playVideoWithURL(url: NSURL) {

              player = AVPlayer(URL: url)
              player.muted = false

              playerLayer.player = player

              player.play()

              loopVideo(player)
          }

          func toggleMute() {
              player.muted = !player.muted
          }

          func isMuted() -> Bool
          {
                        return player.muted
          }

          func loopVideo(videoPlayer: AVPlayer) {

              NSNotificationCenter.defaultCenter().addObserverForName(AVPlayerItemDidPlayToEndTimeNotification, object: nil, queue: nil) { notification in

                  videoPlayer.seekToTime(kCMTimeZero)
                  videoPlayer.play()
              }
          }

      }

根据 ViewController 修改您的故事板：-

   class ViewController: UIViewController {        

       @IBOutlet weak var videoView : VideoPlay!  

       override func viewDidLoad() {
               super.viewDidLoad()
                       let bundle: NSBundle = NSBundle.mainBundle()
                       let moviePath: String = bundle.pathForResource("yourVideoFile_Name", ofType: "yourVideoFile_Type")!
                       let movieUrl : NSURL = NSURL.fileURLWithPath(moviePath)

                       videoView.playVideoWithURL(movieUrl)


           }....
     }

由于videoView符合classVideoPlay，可以访问 VideoPlay的全局函数。

至于保存视频文件的位置，请将其保存在主包中，即：- 在您的情况下 Fighting Trainer Pro 文件夹

例如：-

toggleMute()

isMuted()

Answer 2

Dravidian 回答的 Objective-C 版本。还包含关键的 layoutSubviews 方法，使视频层实际上与视图保持相同的大小！


#import "LBVideoView.h"
#import <AVFoundation/AVFoundation.h>

@interface LBVideoView ()
{
    AVPlayer *_player;
    AVPlayerLayer *_playerLayer;
}
@end

@implementation LBVideoView
- (instancetype)initWithFrame:(CGRect)frame
{
    return [[super initWithFrame:frame] commonInit];
}
- (instancetype)initWithCoder:(NSCoder *)aDecoder
{
    return [[super initWithCoder:aDecoder] commonInit];
}

- (instancetype)commonInit
{
    _playerLayer = [AVPlayerLayer new];
    _playerLayer.backgroundColor = UIColor.clearColor.CGColor;
    _playerLayer.videoGravity = AVLayerVideoGravityResizeAspect;
    [self.layer addSublayer:_playerLayer];
    _playerLayer.frame = self.bounds;
    return self;
}

- (void)dealloc
{
    [[NSNotificationCenter defaultCenter] removeObserver:self];
}

- (void)playVideoWithURL:(NSURL*)url
{
    _player = [AVPlayer playerWithURL:url];
    _playerLayer.player = _player;
    [_player play];
    [self loopVideo];
}

- (void)loopVideo
{
    [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(movieEnded) name:AVPlayerItemDidPlayToEndTimeNotification object:nil];
}
- (void)movieEnded
{
    [_player seekToTime:kCMTimeZero];
    [_player play];
}

- (void)layoutSubviews
{
    [super layoutSubviews];
    _playerLayer.frame = self.bounds;
}

@end

如何在 iOS 中播放循环视频？

How to play a looping video in iOS?

ios

swift

video

avplayer