逍遙文工作室

有時候會看到某些App，開啟App就會播放高畫質的影片，起初我以為是顯示GIF影像，然而實際上應是無限循環播放影片。比如我在每天都可以思考的公司做過華視新聞App，我合作同事就是實作這一部份。

想要做到其實很簡單，照抄以下程式碼⋯⋯

關鍵就是去觀察影片是否播放到結尾，若是的話就從起點再次播放。

此段程式碼有處理離開App與進入App的狀況，將影片擴大到全螢幕，隱藏播放控制介面。

#import <AVKit/AVKit.h>
@property (nonatomic, strong) AVPlayerViewController *playerViewController;
@property (nonatomic, strong) AVPlayer *videoPlayer;
@property (nonatomic, strong) AVPlayerItem *playerItem;

- (void)viewDidLoad {
    [super viewDidLoad];

        __weak typeof(self) weakSelf = self; // prevent memory cycle
        NSNotificationCenter *noteCenter = [NSNotificationCenter defaultCenter];
        [noteCenter addObserverForName:AVPlayerItemDidPlayToEndTimeNotification
                                object:nil
                                 queue:nil
                            usingBlock:^(NSNotification *note) {
                                [weakSelf.videoPlayer seekToTime:kCMTimeZero];
                                [weakSelf.videoPlayer play];
                            }];
        [noteCenter addObserverForName:UIApplicationDidBecomeActiveNotification
                                object:nil
                                 queue:nil
                            usingBlock:^(NSNotification *note) {
                                [weakSelf playVideo];
                            }];
        [noteCenter addObserverForName:UIApplicationWillResignActiveNotification
                                object:nil
                                 queue:nil
                            usingBlock:^(NSNotification *note) {
                                [weakSelf pauseVideo];
                            }];
}

-(void)viewWillAppear:(BOOL)animated
{
    [super viewWillAppear:animated];
    
    [self playVideo];
}

-(void)viewDidDisappear:(BOOL)animated
{
    [self pauseVideo];
    
    NSNotificationCenter *noteCenter = [NSNotificationCenter defaultCenter];
    [noteCenter removeObserver:self];
    
    [super viewDidDisappear:animated];
}

-(void)playVideo
{
    NSString *videoPath = [[NSBundle mainBundle] pathForResource:@"launch video" ofType:@"mp4"];
    NSURL *videoURL =[NSURL fileURLWithPath:videoPath];
    if (!self.playerItem) {
        self.playerItem = [AVPlayerItem playerItemWithURL:videoURL];
    }
    if (!self.videoPlayer) {
        self.videoPlayer = [[AVPlayer alloc] initWithPlayerItem:self.playerItem];
    }
    if (!self.playerViewController) {
        self.playerViewController = [[AVPlayerViewController alloc] init];
        self.playerViewController.player = self.videoPlayer;
        self.playerViewController.player.volume = 0;
        self.playerViewController.view.frame = self.view.bounds;
        self.playerViewController.videoGravity = AVLayerVideoGravityResizeAspectFill;
        self.playerViewController.showsPlaybackControls = NO;
        [backgroundImageView addSubview:self.playerViewController.view];
        [backgroundImageView sendSubviewToBack:self.playerViewController.view];
    }
    [self.videoPlayer play];
}

-(void)pauseVideo
{
    [self.videoPlayer pause];
}

感覺很簡單吧～

參考：。