iOS-音频和视频

2019-11-14 18:16:59

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来源：转载

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一、视频

视频播放器需要添加MediaPlayer.framework.
视频播放主要提供了两个类，一个MPMoviePlayerController, 另一个是MPMoviePlayerViewController.
视频资源可以从本地获得，也可以从服务器获得。

MPMoviePlayerController播放本地视频资源(本地资源URL出现汉字不能编码)

NSString *path = [[NSBundle mainBundle]pathForResource:@"root" ofType:@"mp4"];NSURL *url = [NSURL fileURLWithPath:path];_playcontroller = [[MPMoviePlayerController alloc]initWithContentURL:url];_playcontroller.view.frame = CGRectMake(0, 100, 320, 300);[_playcontroller play];[self.view addSubview:_playcontroller.view];

MPMoviePlayerController播放网络资源（服务器为自己搭建，地址不可使用，连接服务器的URL，出现汉字需要编码）

str = [str stringByAddingPercentEscapesUsingEncoding:NSUTF8StringEncoding]//编码方法

NSURL *url = [NSURL URLWithString:@"http://localhost:8080/media/root.mp4"];_playcontroller.view.frame = CGRectMake(0, 100, 320, 300);
[_playcontroller play];[self.view addSubview:_playcontroller.view];

可以加一个通知，在视频播放完毕的时候发出通知，将视图从界面上移除。

- (void)viewDidLoad{    [super viewDidLoad];	// Do any additional setup after loading the view, typically from a nib.    [[NSNotificationCenter defaultCenter]addObserver:self selector:@selector(removeMedia) name:MPMoviePlayerPlaybackDidFinishNotification object:nil];}-(void)removeMedia{    [_playcontroller.view removeFromSuperview];}

MPMoviePlayerViewController播放视频资源

NSURL *url = [NSURL URLWithString:@"http://localhost:8080/media/root.mp4"];MPMoviePlayerViewController *player = [[MPMoviePlayerViewController alloc]initWithContentURL:url];[self PResentViewController:player animated:YES completion:nil];

效果图：

MPMoviePlayerViewController如何让视频横屏播放。

横屏播放，需要继承MPMoviePlayerViewController这个类。假设myMPMoviePlayerViewController继承这个类。

我们需要在myMPMoviePlayerViewController中实现两个方法。

-(BOOL)shouldAutorotate{    return YES;}-(NSUInteger)supportedInterfaceOrientations{    return  UIInterfaceOrientationMaskLandscape;}

然后在实现下面代码：

NSURL *url = [NSURL URLWithString:@"http://localhost:8080/media/root.mp4"];myMPMoviePlayerViewController *player = [[myMPMoviePlayerViewController alloc]initWithContentURL:url];[self presentViewController:player animated:YES completion:nil];

效果图为：

二、音频

音频的话，我们需要框架AVFoundation.framework

音频的话，一般需要使用进度条显示音频播放的进度。

@interface ViewController : UIViewController{    //音频播放器    AVAudioPlayer * _audioPalyer;    IBOutlet UISlider *_slider;    float currentProgress;    NSTimer *_timer;}- (IBAction)playButton:(id)sender;- (IBAction)stopButton:(id)sender;@end

- (void)viewDidLoad{    [super viewDidLoad];	// Do any additional setup after loading the view, typically from a nib.    _slider.value = 0.0;}- (IBAction)playButton:(id)sender{   _timer = [NSTimer scheduledTimerWithTimeInterval:1.0f target:self selector:@selector(moveSlide) userInfo:nil repeats:YES];        NSString *path = [[NSBundle mainBundle]pathForResource:@"1" ofType:@"mp3"];    NSData *data = [NSData dataWithContentsOfFile:path];    _audioPalyer = [[AVAudioPlayer alloc]initWithData:data error:nil];    [_audioPalyer play];        _slider.maximumValue = _audioPalyer.duration;    [_slider addTarget:self action:@selector(changeSlide) forControlEvents:UIControlEventValueChanged];}-(void)changeSlide{    _audioPalyer.currentTime = _slider.value;}-(void)moveSlide{    _slider.value = _audioPalyer.currentTime;}- (IBAction)stopButton:(id)sender{    UIButton *button = (UIButton *)sender;       if (button.tag == 0)    {        [_audioPalyer pause];        [button setTitle:@"继续播放" forState:UIControlStateNormal];        button.tag = 1;        [_timer invalidate];        _timer = nil;    }    else    {        [_audioPalyer play];        [button setTitle:@"暂停" forState:UIControlStateNormal];        button.tag = 0;        [_slider addTarget:self action:@selector(changeSlide) forControlEvents:UIControlEventValueChanged];    }}

效果图：