如何在应用加载时在启动屏幕上播放MP4视频

Question

我有一个MP4视频，我想放在启动画面上。就像在启动画面上加载图像但现在只是一个视频的人一样。而且我确实知道如何在启动画面上放置图像而不是视频任何帮助？

Answer 1

您可以为“主界面”创建自定义ViewController，并在LaunchScreen之后使用它，并在其中使用AVPlayer。在swift中会是这样的：

var player: AVPlayer?

override func viewDidLoad() {
    super.viewDidLoad()

    loadVideo()
}

private func loadVideo() {

    //this line is important to prevent background music stop
    do {
        try AVAudioSession.sharedInstance().setCategory(AVAudioSessionCategoryAmbient)
    } catch { }

    let path = NSBundle.mainBundle().pathForResource("your path", ofType:"mp4")

    player = AVPlayer(URL: NSURL(fileURLWithPath: path!))
    let playerLayer = AVPlayerLayer(player: player)

    playerLayer.frame = self.view.frame
    playerLayer.videoGravity = AVLayerVideoGravityResizeAspectFill
    playerLayer.zPosition = -1

    self.view.layer.addSublayer(playerLayer)

    player?.seekToTime(kCMTimeZero)
    player?.play()
}

Answer 2

使用swift3中的最新语法

import MediaPlayer

class ViewController: UIViewController {

    var player: AVPlayer?

    override func viewDidLoad() {
        super.viewDidLoad()

        self.loadVideo()

        // Do any additional setup after loading the view, typically from a nib.
    }

    private func loadVideo() {

        //this line is important to prevent background music stop
        do {
            try AVAudioSession.sharedInstance().setCategory(AVAudioSessionCategoryAmbient)
        } catch { }

        let path = Bundle.main.path(forResource: "Juvi Landing Page Animation", ofType:"mp4")

        let filePathURL = NSURL.fileURL(withPath: path!)
        let player = AVPlayer(url: filePathURL)
        let playerLayer = AVPlayerLayer(player: player)

        playerLayer.frame = self.view.frame
        playerLayer.videoGravity = AVLayerVideoGravity.resizeAspectFill
        playerLayer.zPosition = -1

        self.view.layer.addSublayer(playerLayer)

        player.seek(to: kCMTimeZero)
        player.play()
    }

Answer 3

您无法在启动屏幕上放置视频，但可以在苹果启动后立即启动视频。在视觉上，效果可以无法区分。

只需在第一个视图控制器的viewDidLoad方法上添加视频播放调用，并放置一些控件，不要强制用户在应用程序运行时一直查看它。否则您的用户很快就会生气。

Yom可能希望将视频的第一个摄影图调整到您的启动屏幕，并为多个设备分辨率提供不同的视频。请记住，各种移动苹果设备支持的各种视频大小并不总是与每个设备的显示大小相匹配。

您的里程可能会有所不同，您需要“旋转”您的视频，使其在水平播放时显示为“垂直”。

Ef。：

- (void) play{
NSString *videoName=@"video320";
if (UI_USER_INTERFACE_IDIOM() == UIUserInterfaceIdiomPhone) {
        videoName=@"vid_trailer";
        CGFloat height =self.view.frame.size.height;

        //test retina display
        if ([[UIScreen mainScreen] respondsToSelector:@selector(scale)] == YES && [[UIScreen mainScreen] scale] == 2.00) {
            // RETINA DISPLAY - you may need to add check for @3x resolutions
            videoName=@"video920";
        }

        if (height > 460.0){
            videoName=@"video1096";
        }
    } else {
        videoName=@"video768";
        self.view.backgroundColor=[UIColor blackColor];
    }
        NSString *urlString = [[NSBundle mainBundle]     pathForResource:videoName ofType:@"mp4"];
    NSLog(@"urlString=%@",urlString);

    NSURL *url = [NSURL fileURLWithPath:urlString];
    if (self.videoPlayer != nil)
    {
        [self.videoPlayer stop];
        self.videoPlayer=nil;
    }
    self.videoPlayer = [[MPMoviePlayerController alloc] initWithContentURL:url];
    self.videoPlayer.view.frame=self.view.frame;


self.videoPlayer.fullscreen=NO;
[self.videoPlayer setScalingMode:MPMovieScalingModeAspectFill];
[self.videoPlayer setShouldAutoplay:YES];
[self.videoPlayer setControlStyle:MPMovieControlStyleNone];
[[NSNotificationCenter defaultCenter]
 addObserver:self
 selector:@selector(terminateVideo:)
 name:MPMoviePlayerPlaybackDidFinishNotification
 object:nil];
for(UIView* subV in self.videoPlayer.view.subviews) {
    subV.backgroundColor = [UIColor clearColor];
}
[self.tabBarController.view addSubview:self.videoPlayer.view];
[self.navigationController.view addSubview:self.videoPlayer.view];
[self.videoPlayer play];

}

- (void) terminateVideo:(id)sender{
     [self.videoPlayer.view removeFromSuperview];
     self.videoPlayer =nil;
     self.view.backgroundColor=[UIColor darkGrayColor];
 }