iOS进阶学习-多媒体

#import "ViewController.h"

//引入头文件
#import <AudioToolbox/AudioToolbox.h>
@interface ViewController ()

@end

@implementation ViewController

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

#pragma mark - 播放音乐
- (IBAction)playAction:(id)sender {
    
    //得到的主要应用程序包
    CFBundleRef mainBundle;
    SystemSoundID soundFileObject;
    mainBundle = CFBundleGetMainBundle ();
    
    //声音文件的URL
    CFURLRef soundFileURLRef  = CFBundleCopyResourceURL (mainBundle,CFSTR ("蔡琴 - 爱断情伤"),CFSTR ("wav"),NULL);
    
    //注册声音到系统
    AudioServicesCreateSystemSoundID (soundFileURLRef,&soundFileObject);
    
    
    // AudioServicesAddSystemSoundCompletion 方法为音频播放添加 CallBack 函数，有了 CallBack 函数我们可以解决不少问题，比如可以克服 System Sound Services 本身不支持循环播放的问题。
    AudioServicesAddSystemSoundCompletion (soundFileObject, NULL , NULL ,&completionCallback,(__bridge void *) self );
    
    
    //播放注册的声音，（此句代码，可以在本类中的任意位置调用，不限于本方法中）
    AudioServicesPlaySystemSound(soundFileObject);
    
    //让手机震动
    //    AudioServicesPlaySystemSound(kSystemSoundID_Vibrate);

}

static  void  completionCallback (SystemSoundID  ssID, void* clientData) {
    // Play again after sound play completion
    NSLog(@"播放完成-传入ID为-%u,传入的参数为%@", (unsigned int)ssID, clientData);
    
    AudioServicesPlaySystemSound(ssID);
}

void playFinished(SystemSoundID  ssID, void* clientData)
{
//    unsigned long ID = ssID; // ssID 不能直接作为参数打印出来，需要中转一次

    NSLog(@"播放完成-传入ID为-%u,传入的参数为%@", (unsigned int)ssID, clientData);

    AudioServicesPlaySystemSound(ssID);

    // 移除完成后执行的函数
//    AudioServicesRemoveSystemSoundCompletion(ssID);

    // 根据ID释放自定义系统声音
//    AudioServicesDisposeSystemSoundID(ssID);
}

- (void)didReceiveMemoryWarning {
    [super didReceiveMemoryWarning];
    // Dispose of any resources that can be recreated.
}

@end

#import "ViewController.h"
#import <AVFoundation/AVFoundation.h>
#import <AVKit/AVKit.h>
@interface ViewController ()
/// 控制视频播放的控件
@property (weak, nonatomic) IBOutlet UISlider *progressSlider;
/// 声明播放视频的控件属性(也可以用于播放音频)
@property (nonatomic, strong) AVPlayer *player;
/// 播放的总时长
@property (nonatomic, assign) CGFloat sumPlayOperation;

@end

@implementation ViewController

- (void)viewDidLoad {
    [super viewDidLoad];
    // Do any additional setup after loading the view, typically from a nib.
    // 设置播放的url
    NSString *playString = @"http://static.tripbe.com/videofiles/20121214/9533522808.f4v.mp4";
    NSURL *url = [NSURL URLWithString:playString];
    // 设置播放的项目
    AVPlayerItem *item = [[AVPlayerItem alloc] initWithURL:url];
    // 初始化player对象
    self.player = [[AVPlayer alloc] initWithPlayerItem:item];
    // 设置播放页面
    AVPlayerLayer *layer = [AVPlayerLayer playerLayerWithPlayer:self.player];
    // 设置播放页面的大小
    layer.frame = CGRectMake(0, 0, [UIScreen mainScreen].bounds.size.width, 300);
    // 设置背景颜色
    layer.backgroundColor = [UIColor cyanColor].CGColor;
    // 设置播放窗口和当前视图之间的比例显示内容
    layer.videoGravity = AVLayerVideoGravityResizeAspect;
    // 添加播放视图到self.view上
    [self.view.layer addSublayer:layer];
    // 设置播放进度的默认值
    self.progressSlider.value = 0;
    // 设置播放的默认音量值
    self.player.volume = 1.0f;
    
    
}
#pragma mark - 开始播放
- (IBAction)startPlayer:(id)sender {
    [self.player play];
}
#pragma mark 停止播放
- (IBAction)stopPlayer:(id)sender {
    [self.player pause];
}
#pragma mark 改变播放进度
- (IBAction)changePlaye:(id)sender {
    self.sumPlayOperation = self.player.currentItem.duration.value / self.player.currentItem.duration.timescale;
    // 第一个参数是：当前时间
    // 第二个参数是：每秒钟有都少帧
    
    [self.player seekToTime:CMTimeMakeWithSeconds(self.progressSlider.value * self.sumPlayOperation, self.player.currentTime.timescale) completionHandler:^(BOOL finished) {
        [self.player play];
    }];
}