iOS中一共有四种专门实现播放音频的方式
1、System Sound Services (系统声音服务)
2、OpenAL (跨平台的开源的音频处理接口)
3、Audio Queue Services (播放和录制音频服务)
4、AVAudioPlayer (高级音频播放器)
System Sound Services
System Sound Services 是最底层也是最简单的声音播放服务,通过调用AudioServicesPlaySystemSound 这个函数就可以播放一些简单的音频文件
使用场景:播放一些很小的提示或警告音
局限性:1、声音的长度要小于30秒
2、格式:IMA4
3、不能控制播放的进度
4、调用方法后立即播放声音
5、没有循环播放和立体声音播放
OpenAL
OpenAL是一套跨平台的开源的音频处理接口
最适合开发游戏的视频
OpenAL包含三个实体:Listener(听者) Source(音源)Buffer(缓存)
开发步骤:
1、获取device
2、将context关联到device
3、将数据放在buffer
4、将buffer链接到一个source
5、播放source
Audio Queue Services
Audio Queue Services 主要用来实现录制音频,为了简化音频文件的处理,通常还需要使用到AudioFileServices
AVAudioPlayer
支持的音频格式:AAC、AMR、ALAC、iLBC、IMA4、LinearPCM、MP3
优势:1、支持更多的格式 2、可以播放任意长度的音频文件 3、支持循环播放 4、可以同步播放多个音频文件 5、控制播放进度以及从音频的任意一点开始播放
使用AVAudioPlayer的第一步就是引入系统类库
#import <AVFoundation/AVFoundation.h>第二步:初始化AVAudioPlayer对象
第三步:设置属性
第四步:设置预播放、播放、暂停、停止等方法
第五步:代理方法
- (void)viewDidLoad { [super viewDidLoad]; // Do any additional setup after loading the view from its nib. // 初始化 self.timeArray = [NSMutableArray new]; self.lyricsDictionary = [NSMutableDictionary new]; // 经分析:具体播放哪首歌曲,需要上个界面传过来 // 获取当前音乐的model类 MusicModel *model = [MusicDataManager shareInstence].musicArray[self.playIndex]; // 初始化音乐播放器对象 NSURL *url = [NSURL fileURLWithPath:[[NSBundle mainBundle] pathForResource:model.musicName ofType:model.musicType]]; audioPlayer = [[AVAudioPlayer alloc] initWithContentsOfURL:url error:nil]; // 设置音量【最小值,最大值】 self.volumnSlider.minimumValue = 0; self.volumnSlider.maximumValue = 1; // 设置播放器默认的音量 audioPlayer.volume = 0; self.volumnSlider.value = audioPlayer.volume; // [self.volumnSlider addTarget:self action:@selector(sliderAction:) forControlEvents:UIControlEventTouchUpInside]; // 设置音量按钮的图片 [self.volumnSlider setThumbImage:[UIImage imageNamed:@"soundSlider"] forState:UIControlStateNormal]; // 高亮状态 [self.volumnSlider setThumbImage:[UIImage imageNamed:@"soundSlider"] forState:UIControlStateHighlighted]; // 设置进度按钮的图片 self.progressSlider.value = 0; [self.progressSlider setThumbImage:[UIImage imageNamed:@"sliderThumb_small"] forState:UIControlStateNormal]; [self.progressSlider setThumbImage:[UIImage imageNamed:@"sliderThumb_small"] forState:UIControlStateHighlighted]; // 获取歌词 [self getLyrics]; // 设置代理 self.showLyricsTableView.delegate = self; self.showLyricsTableView.dataSource = self; // 设置定时器,0.1秒之后刷新,播放时间的刷新,如果本首歌曲播放完毕,是否进去下一首 [NSTimer scheduledTimerWithTimeInterval:0.1 target:self selector:@selector(showTime) userInfo:nil repeats:YES]; } #pragma mark - 定时刷新所有的数据 - (void)showTime { // 刷新进度条的数据 if ((int)audioPlayer.currentTime % 60 < 10) { self.startTimeLabel.text = [NSString stringWithFormat:@"%d:0%d", (int)audioPlayer.currentTime / 60, (int)audioPlayer.currentTime % 60]; } else { self.startTimeLabel.text = [NSString stringWithFormat:@"%d:%d", (int)audioPlayer.currentTime / 60, (int)audioPlayer.currentTime % 60]; } if ((int)audioPlayer.duration % 60 < 10) { self.endTimeLabel.text = [NSString stringWithFormat:@"%d:0%d", (int)audioPlayer.duration / 60, (int)audioPlayer.duration % 60]; } else { self.endTimeLabel.text = [NSString stringWithFormat:@"%d:%d",(int)audioPlayer.duration / 60, (int)audioPlayer.duration % 60]; } // 设置slider的Value值 self.progressSlider.value = audioPlayer.currentTime / audioPlayer.duration; // 动态显示歌词 [self displaySoundWord:audioPlayer.currentTime]; // 在播放完毕之后,自动播放下一首 if (self.progressSlider.value > 0.99) { // 自动播放 [self autoPlay]; } } #pragma mark - 自动播放 - (void)autoPlay { // 判断 if (self.playIndex == [MusicDataManager shareInstence].musicArray.count - 1) { self.playIndex = -1; } self.playIndex++; [self updatePlayerSetting]; } #pragma mark - 动态显示歌词 - (void)displaySoundWord:(NSUInteger)time { for (int i = 0; i < _timeArray.count; i++) { NSArray *array = [self.timeArray[i] componentsSeparatedByString:@":"]; // 把数组中存在的时间,转换成秒 NSUInteger currentTime = [array[0] intValue] * 60 + [array[1] intValue]; if (i == self.timeArray.count - 1) { // 求出最后一句歌词的时间点 NSArray *array1 = [self.timeArray[self.timeArray.count - 1] componentsSeparatedByString:@":"]; NSUInteger currentTime1 = [array1[0] intValue] * 60 + [array1[1] intValue]; if (time > currentTime1) { // 刷新歌词界面 [self updateLyricsTableView:i]; break; } } else { //求出第一句的时间点,在第一句显示前的时间内一直加载第一句 NSArray *array2 = [self.timeArray[0] componentsSeparatedByString:@":"]; NSUInteger currentTime2 = [array2[0] intValue] * 60 + [array2[1] intValue]; if (time < currentTime2) { [self updateLyricsTableView:0]; //NSLog(@"马上到第一句"); break; } //求出下一步的歌词时间点,然后计算区间 NSArray *array3 = [self.timeArray[i+1] componentsSeparatedByString:@":"]; NSUInteger currentTime3 = [array3[0] intValue] * 60 + [array3[1] intValue]; if (time >= currentTime && time <= currentTime3) { //动态更新歌词表中的歌词 [self updateLyricsTableView:i]; break; } } } } #pragma mark - 动态更新歌词 - (void)updateLyricsTableView:(NSInteger)index { // 重载tableView的 [self.showLyricsTableView reloadData]; // 如果被选中某一行,移动到相关的位置 NSIndexPath *indexPath = [NSIndexPath indexPathForRow:index inSection:0]; [self.showLyricsTableView selectRowAtIndexPath:indexPath animated:YES scrollPosition:UITableViewScrollPositionMiddle]; } #pragma mark - 控制音量 //- (void)sliderAction:(UISlider *)sender { // audioPlayer.volume = self.volumnSlider.value; //} - (IBAction)volumnChange:(UISlider *)sender { audioPlayer.volume = self.volumnSlider.value; } #pragma mark - 改变进度的 - (IBAction)progressChange:(UISlider *)sender { audioPlayer.currentTime = self.progressSlider.value * audioPlayer.duration; } #pragma mark - 获取歌词 - (void)getLyrics { // 获取音乐model MusicModel *model = [MusicDataManager shareInstence].musicArray[self.playIndex]; NSString *lyricsPath = [[NSBundle mainBundle] pathForResource:model.musicName ofType:@"lrc"]; // 编码 NSString *lyricsUTF8 = [NSString stringWithContentsOfFile:lyricsPath encoding:NSUTF8StringEncoding error:nil]; // 以/n分割,最后使用数组存取 // NSArray *array = [lyricsUTF8 componentsSeparatedByString:@"\n"]; // for (int i = 0; i < array.count; i++) { //// 获取每一行的内容 // NSString *lineStr = array[i]; //// NSLog(@"%@", lineStr); // NSArray *lineArray = [lineStr componentsSeparatedByString:@"]"]; //// NSLog(@"%@", lineArray); // NSLog(@"%@",lineArray[0]); //// NSLog(@"%@",lineArray[1]); //// NSLog(@"%@", lineArray[2]); //// 如果长度大于8的时候才进行歌词的操作 //// 有歌词没歌词的判断 // if (lineArray.count > 1) { //// 取出:和.,然后根据他们进行判断 // if ([[lineArray[0] substringWithRange:NSMakeRange(6, 1)] isEqualToString:@"."]) { // // NSArray *array1 = [lineArray[0] componentsSeparatedByString:@"."]; // NSLog(@"%@", array1[1]); // NSLog(@"%@", array1); // if ([array1[1] length] == 2) { // NSArray *array = [array1[0] componentsSeparatedByString:@"["]; //// NSLog(@"==========%@", lineArray[1]); // // [self.lyricsDictionary setObject:lineArray[1] forKey:array[1]]; // } // } // } // } // NSLog(@"====%@", self.lyricsDictionary); //// // self.timeArray = [self.lyricsDictionary allKeys].mutableCopy; // //将字符串切割成数组 NSArray *array = [lyricsUTF8 componentsSeparatedByString:@"\n"]; for (int i = 0; i < array.count; i++) { NSString *linStr = [array objectAtIndex:i]; NSArray *lineArray = [linStr componentsSeparatedByString:@"]"]; //有的有歌词没时间 if (lineArray.count > 1) { //取出:和.进行比较 NSString *str1 = [linStr substringWithRange:NSMakeRange(3, 1)]; NSString *str2 = [linStr substringWithRange:NSMakeRange(6, 1)]; if ([str1 isEqualToString:@":"] && [str2 isEqualToString:@"."]) { //歌词 NSString *lrcStr = [lineArray objectAtIndex:1]; //时间 NSString *timeStr = [lineArray[0] substringWithRange:NSMakeRange(1, 5)]; [self.timeArray addObject:timeStr]; [self.lyricsDictionary setObject:lrcStr forKey:timeStr]; } } } } #pragma mark - 播放按钮的响应方法 - (IBAction)playButtonAction:(UIButton *)sender { // 判断是否正在播放修改相关的内容 if (!isPlay) { [audioPlayer play]; [self.playButotn setImage:[UIImage imageNamed:@"c"] forState:UIControlStateNormal]; isPlay = YES; } else { [audioPlayer pause]; [self.playButotn setImage:[UIImage imageNamed:@"play"] forState:UIControlStateNormal]; isPlay = NO; } } #pragma mark - 上一首的响应方法 - (IBAction)backButotnAction:(UIButton *)sender { if (self.playIndex == 0) { self.playIndex = [MusicDataManager shareInstence].musicArray.count; } self.playIndex--; [self updatePlayerSetting]; } #pragma mark - 更新播放器的设置 - (void)updatePlayerSetting { // 更改播放按钮的状态 [self.playButotn setBackgroundImage:[UIImage imageNamed:@"c"] forState:UIControlStateNormal]; isPlay = YES; // 获取播放的音乐对象 MusicModel *model = [MusicDataManager shareInstence].musicArray[self.playIndex]; // 更新曲目 NSURL *url = [NSURL fileURLWithPath:[[NSBundle mainBundle] pathForResource:model.musicName ofType:@"mp3"]]; audioPlayer = [[AVAudioPlayer alloc] initWithContentsOfURL:url error:nil]; // 音量的重置 audioPlayer.volume = self.volumnSlider.value; // 歌词的更新 self.timeArray = [NSMutableArray array]; self.lyricsDictionary = [NSMutableDictionary dictionary]; [self getLyrics]; [audioPlayer play]; } #pragma mark - 下一首的响应方法 - (IBAction)nextButtonAction:(UIButton *)sender { if (self.playIndex == [MusicDataManager shareInstence].musicArray.count - 1) { self.playIndex = -1; } self.playIndex++; [self updatePlayerSetting]; } - (void)didReceiveMemoryWarning { [super didReceiveMemoryWarning]; // Dispose of any resources that can be recreated. } #pragma mark - TableView的代理方法 - (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section { return self.timeArray.count; } - (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath { UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:@"musicLyricCell"]; if (cell == nil) { cell = [[UITableViewCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:@"musicLyricCell"]; } // cell.textLabel.text = self.timeArray[indexPath.row]; // 设置选中的样式 cell.selectionStyle = UITableViewCellSelectionStyleNone; cell.backgroundColor = [UIColor clearColor]; cell.textLabel.text = [self.lyricsDictionary objectForKey:self.timeArray[indexPath.row]]; cell.textLabel.font = [UIFont systemFontOfSize:13]; cell.textLabel.textAlignment = NSTextAlignmentCenter; return cell; }