AVPlayer实现视频播放

Demo

实现功能：
1.视频的播放/暂停
2.播放进度前进后退

ViewController
import AVFoundation/AVFoundation.h
import “TQPlayView.h”

@interface ViewController ()

@property (nonatomic,strong) AVPlayer *player;

@property (nonatomic,strong) AVPlayerItem *item;

@property (nonatomic) CMTime time;

@property (weak, nonatomic) IBOutlet UISlider *proSlider;
- (IBAction)proChange:(id)sender;

(IBAction)start:(id)sender;

@end

//UIView —> CALayer
//AVPlayer —> layer —> AVPlayerLayer.player

//UIView

@implementation ViewController

(void)viewDidLoad {
[super viewDidLoad];
// Do any additional setup after loading the view, typically from a nib.

NSString *path = [[NSBundle mainBundle] pathForResource:@”3” ofType:@”mp4”];
//
self.item = [[AVPlayerItem alloc] initWithURL:[NSURL fileURLWithPath:path]];

self.player = [[AVPlayer alloc] initWithPlayerItem:self.item];

TQPlayView *playView = [[TQPlayView alloc] initWithFrame:self.view.bounds];
//CALayer
((AVPlayerLayer *)playView.layer).player = self.player;
[self.view addSubview:playView];
[self.view sendSubviewToBack:playView];

//
[self.item addObserver:self forKeyPath:@”status” options:NSKeyValueObservingOptionNew context:nil];
}

-(void)observeValueForKeyPath:(NSString )keyPath ofObject:(id)object change:(NSDictionary )change context:(void *)context
{
AVPlayerItemStatus s = [change[NSKeyValueChangeNewKey] integerValue];

if(s == AVPlayerItemStatusReadyToPlay)
{//总时间//帧率  CMTime  value 总帧数  timescale  每秒播放的帧数self.proSlider.maximumValue = self.item.duration.value / self.item.duration.timescale;self.time = self.item.duration;//防止循环引用__weak UISlider *slider = self.proSlider;//添加一个定时   间隔时间 1[self.player addPeriodicTimeObserverForInterval:CMTimeMake(1, 1) queue:nil usingBlock:^(CMTime time) {//time 当前的播放时间slider.value = time.value / time.timescale;}];
}

}

(void)didReceiveMemoryWarning {
[super didReceiveMemoryWarning];
// Dispose of any resources that can be recreated.
}
(IBAction)proChange:(UISlider *)sender {
//sender.value * timescale
[self.player seekToTime:CMTimeMake(sender.value * self.time.timescale, self.time.timescale)];
}
(IBAction)start:(UIButton *)sender {

if(!sender.selected)
{
[self.player play];
}
else
{
[self.player pause];
}

sender.selected = !sender.selected;
}

TQPlayView.m

import AVFoundation/AVFoundation.h

@implementation TQPlayView
//改变layer的类型 AVPlayerLayer
+(Class)layerClass
{
return [AVPlayerLayer class];
}

/*
// Only override drawRect: if you perform custom drawing.
// An empty implementation adversely affects performance during animation.
- (void)drawRect:(CGRect)rect {
// Drawing code
}
*/

@end

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AVPlayer实现视频播放

Demo

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