简单地音频播放 AVPlayer 供参考_简单av

想把音频播放做成 缓冲一些便开始播放 没有找到相关方法 有知道的朋友希望能给予指教

//

#import "AVPlayerViewController.h"

@interface AVPlayerViewController ()

{

    id timeObserve;

    NSTimer *playTimer;

}

@property (nonatomic,strong)AVPlayer *player;

@property (nonatomic,strong)AVPlayerItem *playeritem;

//@property (nonatomic, assign) BOOL isPlaying;

@property (nonatomic,strong)UISlider *sliderProgress;

@property (nonatomic,strong)UIProgressView *playerProgress;

@property (nonatomic,strong)UIImageView *backView;

@property (nonatomic,strong)UIImageView *revolveView;

@property (nonatomic,strong)UILabel *nowTimeLabel;

@property (nonatomic,strong)UILabel *totalTimeLabel;

@property (nonatomic,strong)UIButton *playButton;

@property (nonatomic,assign)BOOL play;

@property (nonatomic,assign)CGFloat playheadTime;

@property (nonatomic,assign)CGFloat totalTime;

@end

@implementation AVPlayerViewController

- (void)dealloc{

    [self.playeritemremoveObserver:self forKeyPath:@"status" context:nil];

    [self.playeritemremoveObserver:self forKeyPath:@"loadedTimeRanges" context:nil];

    [[NSNotificationCenterdefaultCenter]removeObserver:self name:AVPlayerItemDidPlayToEndTimeNotification object:self.playeritem];

    [[NSNotificationCenterdefaultCenter] removeObserver:self];

    [self.playerremoveTimeObserver:timeObserve];

}

- (void)backAction{

    [self.playerpause];

    [playTimerinvalidate];

    playTimer =nil;

    [self.navigationControllerpopViewControllerAnimated:YES];

}

- (void)viewDidLoad {

    [superviewDidLoad];

    // Do any additional setup after loading the view.

    self.view.backgroundColor = [UIColorwhiteColor];

    self.navigationItem.hidesBackButton = YES;

    self.navigationItem.leftBarButtonItem = [[UIBarButtonItemalloc] initWithTitle:@"back" style:UIBarButtonItemStylePlain target:self action:@selector(backAction)];

    //

    if (!_backView) {

        _backView = [[UIImageViewalloc] initWithFrame:CGRectMake(0,0, [UIScreenmainScreen].bounds.size.width, [UIScreen mainScreen].bounds.size.width *9/16)];

        _backView.image = [UIImageimageNamed:@"2.52.01"];

        _backView.userInteractionEnabled =YES;

        UIBlurEffect *effect=[UIBlurEffecteffectWithStyle:UIBlurEffectStyleLight];

        UIVisualEffectView *efficview=[[UIVisualEffectViewalloc] initWithEffect:effect];

        efficview.frame=_backView.frame;

        [_backViewaddSubview:efficview];

        [self.viewaddSubview:_backView];

    }

    if (!_revolveView) {

        _revolveView = [[UIImageViewalloc] initWithFrame:CGRectMake([UIScreenmainScreen].bounds.size.width/2-75, [UIScreen mainScreen].