IOS视频播放

IOS提供了叫做MPMoviePlayerController MPMoviePlayerViewController两个类，可以轻松用来实现视频播放。MPMoviePlayerViewController只能全屏播放视频。
[objc] view plaincopy





#import "MainViewController.h"

#import <MediaPlayer/MediaPlayer.h>

@interface MainViewController ()

//视频播放器

@property (strong, nonatomic) MPMoviePlayerController *player;

@property (strong, nonatomic) UIImageView *imageView;

@end

@implementation MainViewController

- (void)viewDidLoad

{

[super viewDidLoad];

//实例化视频播放器

NSURL *url = [[NSBundle mainBundle]URLForResource:@"promo_full" withExtension:@"mp4"];

//视频播放是流媒体的播放模式，所谓流媒体就是把视频数据像流水一样，变加载，变播放。

// //提示：如果url中包含中文，需要添加百分号。

// NSString *urlString = @"http:www.xxx.com/video/xxx.mp4";

// NSURL *url = [NSURL URLWithString:[urlString stringByAddingPercentEscapesUsingEncoding:NSUTF8StringEncoding]];

self.player = [[MPMoviePlayerController alloc]initWithContentURL:url];

//1设置播放器的大小

[self.player.view setFrame:CGRectMake(0, 0, 320, 180)]; //16:9是主流媒体的样式

//2将播放器视图添加到根视图

[self.view addSubview:self.player.view];

//4播放

[self.player play];

//[self.player stop];

//通过通知中心，以观察者模式监听视频播放状态

//1 监听播放状态

[[NSNotificationCenter defaultCenter]addObserver:self selector:@selector(stateChange) name:MPMoviePlayerPlaybackStateDidChangeNotification object:nil];

//2 监听播放完成

[[NSNotificationCenter defaultCenter]addObserver:self selector:@selector(finishedPlay) name:MPMoviePlayerPlaybackDidFinishNotification object:nil];

//3视频截图

[[NSNotificationCenter defaultCenter]addObserver:self selector:@selector(caputerImage:) name:MPMoviePlayerThumbnailImageRequestDidFinishNotification object:nil];

//3视频截图

[[NSNotificationCenter defaultCenter]addObserver:self selector:@selector(caputerImage:) name:MPMoviePlayerThumbnailImageRequestDidFinishNotification object:nil];

//4退出全屏通知

[[NSNotificationCenter defaultCenter]addObserver:self selector:@selector(exitFullScreen) name:MPMoviePlayerDidExitFullscreenNotification object:nil];

//异步视频截图,可以在attimes指定一个或者多个时间。

[self.player requestThumbnailImagesAtTimes:@[@10.0f, @20.0f] timeOption:MPMovieTimeOptionNearestKeyFrame];

UIImageView *thumbnailImageView = [[UIImageView alloc]initWithFrame:CGRectMake(80, 200, 160, 90)];

self.imageView = thumbnailImageView;

[self.view addSubview:thumbnailImageView];

}

#pragma mark 退出全屏

- (void)exitFullScreen

{

NSLog(@"退出全屏");

}

#pragma mark -播放器事件监听

#pragma mark 视频截图 这个方法是异步方法

- (void)caputerImage:(NSNotification *)notification

{

NSLog(@"截图 %@", notification);

UIImage *image = notification.userInfo[@"MPMoviePlayerThumbnailImageKey"];

[self.imageView setImage:image];

}

#pragma mark 播放器事件监听

#pragma mark 播放完成

- (void)finishedPlay

{

NSLog(@"播放完成");

}

#pragma mark 播放器视频的监听

#pragma mark 播放状态变化

/*

MPMoviePlaybackStateStopped, //停止

MPMoviePlaybackStatePlaying, //播放

MPMoviePlaybackStatePaused, //暂停

MPMoviePlaybackStateInterrupted, //中断

MPMoviePlaybackStateSeekingForward, //快进

MPMoviePlaybackStateSeekingBackward //快退

*/

- (void)stateChange

{

switch (self.player.playbackState) {

case MPMoviePlaybackStatePaused:

NSLog(@"暂停");

break;

case MPMoviePlaybackStatePlaying:

//设置全屏播放

[self.player setFullscreen:YES animated:YES];

NSLog(@"播放");

break;

case MPMoviePlaybackStateStopped:

//注意：正常播放完成，是不会触发MPMoviePlaybackStateStopped事件的。

//调用[self.player stop];方法可以触发此事件。

NSLog(@"停止");

break;

default:

break;

}

}

@end