ios - 如何: Local MP4 Video as Background in iOS App Objective C iOS 8

Question

我尝试使用一个简单的 13 秒 mp4 视频作为登录屏幕的背景循环。

我希望视频自动播放和循环播放。它没有音频，我不需要控件。

我需要在它前面放置按钮和其他对象。

我尝试使用 WebView 并将 MP4 制作为本教程中的 GIF 文件:https://medium.com/swift-programming/ios-make-an-awesome-video-background-view-objective-c-swift-318e1d71d0a2

但问题是我的 5 MB MP4(转换为 GIF)大小为 95 MB。

我不能使用这种方法。

有什么“好用”的方法吗？

编辑:

好的，这就是我现在所做的。

我导入了 AVFoundation。

这是 View 中的代码

- (void)viewDidLoad {
[super viewDidLoad];

NSURL* mURL = [[NSBundle mainBundle] URLForResource:@"App-BG-Loop" withExtension:@"mp4"];

AVPlayer* player = [AVPlayer playerWithURL:mURL];
player.actionAtItemEnd = AVPlayerActionAtItemEndNone;

[[NSNotificationCenter defaultCenter] addObserver:self
                                         selector:@selector(playerItemDidReachEnd:)
                                             name:AVPlayerItemDidPlayToEndTimeNotification
                                           object:[player currentItem]];

AVPlayerLayer* playerLayer = [AVPlayerLayer playerLayerWithPlayer:player];
playerLayer.frame = _videoView.bounds;
playerLayer.videoGravity = AVLayerVideoGravityResizeAspectFill;
playerLayer.needsDisplayOnBoundsChange = YES;
[_videoView.layer addSublayer:playerLayer];

_videoView.layer.needsDisplayOnBoundsChange = YES;

[player play];

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

- (void)playerItemDidReachEnd:(NSNotification *)notification {
AVPlayerItem *p = [notification object];
[p seekToTime:kCMTimeZero];}

这在 iOS 模拟器中运行良好，但当我尝试在设备上启动它时，它无法启动或播放视频。 View 只是保持白色。没有错误。

有什么想法吗？

编辑 2:

无法在设备上播放的问题是视频的大小太大。 Apple 在设备上仅支持 1080p。

Answer 1

我最近也不得不使用动画。我先用 UIImageView 尝试过，但内存管理不太好。我最终从中制作了一个 .mp4 并在 MPMoviePlayerController 中使用它:

-(void)setupDashboardAnimation
{
    [[NSNotificationCenter defaultCenter] addObserver:self
                                             selector:@selector(checkMovieStatus:)
                                                 name:MPMoviePlayerLoadStateDidChangeNotification
                                               object:nil];

    NSBundle *bundle = [NSBundle mainBundle];
    NSString *moviePath = [bundle pathForResource:@"some_movie" ofType:@"some_extention"];
    NSURL *movieURL = [NSURL fileURLWithPath:moviePath];

    [[AVAudioSession sharedInstance] setCategory:AVAudioSessionCategoryAmbient error:nil];

    _backgroundAnimationMoviePlayer = [[MPMoviePlayerController alloc] initWithContentURL:movieURL];
    _backgroundAnimationMoviePlayer.controlStyle = MPMovieControlStyleNone;
    _backgroundAnimationMoviePlayer.repeatMode = MPMovieRepeatModeOne;
    _backgroundAnimationMoviePlayer.view.backgroundColor = [UIColor clearColor];
    for (UIView *aSubView in _backgroundAnimationMoviePlayer.view.subviews)
    {
        aSubView.backgroundColor = [UIColor clearColor];
    }
    [_backgroundAnimationMoviePlayer.view setFrame:imv_background.frame];
    [_backgroundAnimationMoviePlayer prepareToPlay];
}

-(void)checkMovieStatus:(NSNotification *)notification
{
    if (_backgroundAnimationMoviePlayer.loadState & (MPMovieLoadStatePlayable | MPMovieLoadStatePlaythroughOK) && _backgroundAnimationMoviePlayer.playbackState != MPMoviePlaybackStatePlaying)
    {
        [self.view insertSubview:_backgroundAnimationMoviePlayer.view aboveSubview:imv_background];
        [_backgroundAnimationMoviePlayer play];
        [[NSNotificationCenter defaultCenter] removeObserver:self
                                                        name:MPMoviePlayerLoadStateDidChangeNotification
                                                      object:nil];
        dashboardAnimationDidSetup = YES;
    }
}