iOS AVPlayer 与 AVPlayerViewController

iOS 媒体功能主要的类

• AVPlayer 全功能影音播放器
• AVPlayerLayer 主要用于显示视频
• AVPlayerViewController 提供了默认的可视化控制界面

一、 AVPlayer

1. 说明

• 使用AVPlayer需导入AVFoundation.h。
• 支持视频格式： WMV，AVI，MKV，RMVB，RM，XVID，MP4，3GP，MPG等。
• 支持音频格式：MP3，WMA，RM，ACC，OGG，APE，FLAC，FLV等。

在开发中，单纯使用AVPlayer类是无法显示视频的，要将视频层添加至AVPlayerLayer中，这样才能将视频显示出来

• AVPlayer并未提供视频操作组件，需用户自定义。

2. 初始化方法

+ (instancetype)playerWithURL:(NSURL *)URL;+ (instancetype)playerWithPlayerItem:(AVPlayerItem *)item;- (instancetype)initWithURL:(NSURL *)URL;- (instancetype)initWithPlayerItem:(AVPlayerItem *)item;

3. 属性

• status：获取播放媒体状态
• rate：设置播放速度

4. 常用方法

// 1、播放- (void)play;// 2、暂停- (void)pause;

二、 AVPlayerLayer

1. 初始化方法

// 1、遍历初始化+ (instancetype)layer;// 2、alloc + init// 3、根据播放媒体初始化+ (AVPlayerLayer *)playerLayerWithPlayer:(nullable AVPlayer *)player;

2. 常用属性

• bounds：设置播放矩形区域；
• position：设置播放区域中心点位置；
• videoGravity：设置拉伸模式
• player：设置播放媒体

三、 AVPlayerViewController

• 要使用AVPlayerViewController需导入AVKit.h。
• AVPlayerViewController整合了一个完整的播放器，可以作为控制器进行操作显示。
• 支持播放本地及网络视频文件

1. 常用属性

• player：设置播放器
• showsPlaybackControls：设置是否显示媒体播放组件，默认YES
• videoGravity：设置视频拉伸模式
• allowsPictureInPicturePlayback：设置是否允许画中画回放，默认YES
• delegate：设置代理

四、 AVPlayerViewControllerDelegate

// 1、即将开始画中画- (void)playerViewControllerWillStartPictureInPicture:(AVPlayerViewController *)playerViewController;// 2、开始画中画- (void)playerViewControllerDidStartPictureInPicture:(AVPlayerViewController *)playerViewController;// 3、画中画失败- (void)playerViewController:(AVPlayerViewController *)playerViewController failedToStartPictureInPictureWithError:(NSError *)error;// 4、即将结束画中画- (void)playerViewControllerWillStopPictureInPicture:(AVPlayerViewController *)playerViewController;// 5、结束画中画- (void)playerViewControllerDidStopPictureInPicture:(AVPlayerViewController *)playerViewController;

五、 示例

////  ViewController.m//  videotest////  Created by 谢厂节 on 2017/9/12.//  Copyright © 2017年 谢厂节. All rights reserved.//#import "ViewController.h"#import <AVKit/AVKit.h>#import <AVFoundation/AVFoundation.h>enum {    DirectPlayBtnTag = 10,    FullScreenPlayBtnTag};@interface ViewController () <AVPlayerViewControllerDelegate> {    AVPlayer *_player; /**< 媒体播放器 */    AVPlayerViewController *_playerViewController; /**< 媒体播放控制器 */}@property (nonatomic, strong) UIButton *directPlayBtn;     /**< 直接播放按钮 */@property (nonatomic, strong) UIButton *fullscreenPlayBtn; /**< 全屏播放 */@property (nonatomic, strong) AVPlayer *player; /**< 媒体播放器 */@property (nonatomic, strong) AVPlayerViewController *playerViewController; /**< 媒体播放控制器 */- (void)initializeUserInterface; /**< 初始化用户界面 */@end@implementation ViewController- (void)viewDidLoad {    [super viewDidLoad];    [self initializeUserInterface];}#pragma mark *** Initialize methods ***- (void)initializeUserInterface {    self.title = @"音乐播放器";    self.view.backgroundColor = [UIColor whiteColor];    // 加载视图    [self.view addSubview:self.directPlayBtn];    [self.view addSubview:self.fullscreenPlayBtn];}#pragma mark *** Events ***- (void)respondsToButton:(UIButton *)sender {    switch (sender.tag) {            // 直接播放        case DirectPlayBtnTag: {            if (_player) {                [_player pause];                _player = nil;            }            if (_playerViewController) {                [_playerViewController removeFromParentViewController];                [_playerViewController.view removeFromSuperview];                _playerViewController = nil;            }            // 1、获取媒体资源地址            NSString *path = [[NSBundle mainBundle] pathForResource:@"assets/2-0" ofType:@"mp4"];            NSURL *sourceMovieURL = [NSURL fileURLWithPath:path];            // 2、创建AVPlayerItem            AVPlayerItem *playerItem = [AVPlayerItem playerItemWithURL:sourceMovieURL];            // 3、根据AVPlayerItem创建媒体播放器            _player = [AVPlayer playerWithPlayerItem:playerItem];            // 4、创建AVPlayerLayer，用于呈现视频            AVPlayerLayer *playerLayer = [AVPlayerLayer playerLayerWithPlayer:_player];            // 5、设置显示大小和位置            playerLayer.bounds = CGRectMake(0, 0, 350, 300);            playerLayer.position = CGPointMake(CGRectGetMidX(self.view.bounds), 64 + CGRectGetMidY(playerLayer.bounds) + 30);            // 6、设置拉伸模式            playerLayer.videoGravity = AVLayerVideoGravityResizeAspect;            // 7、获取播放持续时间            NSLog(@"%lld", playerItem.duration.value);            [_player play];            [self.view.layer addSublayer:playerLayer];        }            break;            // 全屏播放        case FullScreenPlayBtnTag: {            if (_player) {                [_player pause];                _player = nil;            }            // 初始化URL资源地址            // 获取网络资源地址            // + (nullable instancetype)URLWithString:(NSString *)URLString;            // 1、获取本地资源地址            NSURL *url = [NSURL fileURLWithPath:[[NSBundle mainBundle] pathForAuxiliaryExecutable:@"宣传资料.mp4"]];            // 2、初始化媒体播放控制器            if (_playerViewController) {                _playerViewController = nil;            }            // 3、配置媒体播放控制器            _playerViewController = [[AVPlayerViewController alloc]  init];            // 设置媒体源数据            _playerViewController.player = [AVPlayer playerWithURL:url];            // 设置拉伸模式            _playerViewController.videoGravity = AVLayerVideoGravityResizeAspect;            // 设置是否显示媒体播放组件            _playerViewController.showsPlaybackControls = YES;            // 设置代理            _playerViewController.delegate = self;            // 播放视频            [_playerViewController.player play];            // 设置媒体播放器视图大小            _playerViewController.view.bounds = CGRectMake(0, 0, 350, 300);            _playerViewController.view.center = CGPointMake(CGRectGetMidX(self.view.bounds), 64 + CGRectGetMidY(_playerViewController.view.bounds) + 30);            // 4、推送播放            // 推送至媒体播放器进行播放            // [self presentViewController:_playerViewController animated:YES completion:nil];            // 直接在本视图控制器播放            [self addChildViewController:_playerViewController];            [self.view addSubview:_playerViewController.view];        }            break;        default:            break;    }}#pragma mark *** AVPlayerViewControllerDelegate ***- (void)playerViewControllerWillStartPictureInPicture:(AVPlayerViewController *)playerViewController {    NSLog(@"%@", NSStringFromSelector(_cmd));}- (void)playerViewControllerDidStartPictureInPicture:(AVPlayerViewController *)playerViewController {    NSLog(@"%@", NSStringFromSelector(_cmd));}- (void)playerViewControllerWillStopPictureInPicture:(AVPlayerViewController *)playerViewController {    NSLog(@"%@", NSStringFromSelector(_cmd));}- (void)playerViewControllerDidStopPictureInPicture:(AVPlayerViewController *)playerViewController {    NSLog(@"%@", NSStringFromSelector(_cmd));}- (void)playerViewController:(AVPlayerViewController *)playerViewController failedToStartPictureInPictureWithError:(NSError *)error {    NSLog(@"%@", NSStringFromSelector(_cmd));}#pragma mark *** Getters ***- (UIButton *)directPlayBtn {    if (!_directPlayBtn) {        _directPlayBtn = [UIButton buttonWithType:UIButtonTypeSystem];        _directPlayBtn.bounds = CGRectMake(0, 0, 100, 40);        _directPlayBtn.center = CGPointMake(CGRectGetMidX(self.view.bounds) - CGRectGetMidX(_directPlayBtn.bounds), CGRectGetMidY(self.view.bounds) + 100);        _directPlayBtn.tag = DirectPlayBtnTag;        [_directPlayBtn setTitle:@"直接播放" forState:UIControlStateNormal];        [_directPlayBtn addTarget:self action:@selector(respondsToButton:) forControlEvents:UIControlEventTouchUpInside];    }    return _directPlayBtn;}- (UIButton *)fullscreenPlayBtn {    if (!_fullscreenPlayBtn) {        _fullscreenPlayBtn = [UIButton buttonWithType:UIButtonTypeSystem];        _fullscreenPlayBtn.bounds = CGRectMake(0, 0, 100, 30);        _fullscreenPlayBtn.center = CGPointMake(CGRectGetMidX(self.view.bounds) + CGRectGetMidX(_fullscreenPlayBtn.bounds), CGRectGetMidY(self.view.bounds) + 100);        _fullscreenPlayBtn.tag = FullScreenPlayBtnTag;        [_fullscreenPlayBtn setTitle:@"全屏播放" forState:UIControlStateNormal];        [_fullscreenPlayBtn addTarget:self action:@selector(respondsToButton:) forControlEvents:UIControlEventTouchUpInside];    }    return _fullscreenPlayBtn;}@end

文章内容转自：http://blog.csdn.net/hierarch_lee/article/details/47903979