音频播放

 1  1 #import "ViewController.h"
 2  2 #import <AVFoundation/AVFoundation.h>
 3  3 
 4  4 @interface ViewController ()
 5  5 
 6  6 /** 录音对象 */
 7  7 @property (nonatomic, strong) AVAudioRecorder *recorder;
 8  8 
 9  9 @end
10 10 
11 11 
12 12 #pragma mark - 录制的控制
13 13 - (IBAction)startRecorder {
14 14     [self.recorder record];
15 15 }
16 16 
17 17 - (IBAction)stopRecorder {
18 18     [self.recorder stop];
19 19 }
20 20 
21 21 #pragma mark - 懒加载代码
22 22 - (AVAudioRecorder *)recorder
23 23 {
24 24     if (_recorder == nil) {
25 25         // 1.获取音频存放的路径
26 26         // 1.1.URL决定的录制的音频的存放的位置
27 27         NSString *path = [NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES) firstObject];
28 28         
29 29         // 1.2.拼接一个音频的文件名称
30 30         NSString *filePath = [path stringByAppendingPathComponent:@"123.caf"];
31 31         
32 32         // 1.3.将路径转成URL
33 33         NSURL *url = [NSURL fileURLWithPath:filePath];
34 34         
35 35         // 2.设置音频的相关格式:settings : 决定音频的格式/采样率
36 36         NSDictionary *setttings = @{
37 37                     AVFormatIDKey : @(kAudioFormatLinearPCM),
38 38                     AVSampleRateKey : @(8000)};
39 39         
40 40         // 3.创建录音对象
41 41         self.recorder = [[AVAudioRecorder alloc] initWithURL:url settings:setttings error:nil];
42 42     }
43 43     return _recorder;
44 44 }

- (void)touchesBegan:(NSSet<UITouch *> *)touches withEvent:(UIEvent *)event
{
    // 1.定义一个SystemSoundID
    SystemSoundID soundID = 0;
    
    // 2.根据音频文件资源创建SystemSoundID(赋值)
    NSURL *url = [[NSBundle mainBundle] URLForResource:@"buyao.wav" withExtension:nil];
    CFURLRef urlRef = (__bridge CFURLRef)(url);
    AudioServicesCreateSystemSoundID(urlRef, &soundID);
    
    // 3.播放音频
    // 播放音效的同时有震动效果
    AudioServicesPlayAlertSound(soundID);
    // 仅仅是播放音效
    // AudioServicesPlaySystemSound(soundID);
}

/**
 *  播放音效
 *
 *  @param soundName 音效名称
 */
+ (void)playSoundWithSoundName:(NSString *)soundName;

/**
 *  播放音乐
 *
 *  @param musicName 音乐名称
 */
+ (void)playMusicWithMusicName:(NSString *)musicName;

/**
 *  播放音乐
 *
 *  @param musicName 音乐名称
 */
+ (void)pauseMusicWithMusicName:(NSString *)musicName;

/**
 *  播放音乐
 *
 *  @param musicName 音乐名称
 */
+ (void)stopMusicWithMusicName:(NSString *)musicName;

static NSMutableDictionary *_soundIDs;
static NSMutableDictionary *_players;

+ (void)initialize
{
    _soundIDs = [NSMutableDictionary dictionary];
    _players = [NSMutableDictionary dictionary];
}

+ (void)playSoundWithSoundName:(NSString *)soundName
{
    // 1.从字典中取出之前保存的soundID
    SystemSoundID soundID = [[_soundIDs objectForKey:soundName] unsignedIntValue];
    
    // 2.如果取出为0,表示之前没有加载当前声音
    if (soundID == 0) {
        // 2.1.根据资源文件加载soundID
        CFURLRef url = (__bridge CFURLRef)[[NSBundle mainBundle] URLForResource:soundName withExtension:nil];
        AudioServicesCreateSystemSoundID(url, &soundID);
        
        // 2.2.存入字典
        [_soundIDs setObject:@(soundID) forKey:soundName];
    }
    
    // 3.播放声音
    AudioServicesPlaySystemSound(soundID);
}

+ (void)playMusicWithMusicName:(NSString *)musicName
{
    // 1.从字典中取出之前保存的播放器
    AVAudioPlayer *player = _players[musicName];
    
    // 2.判断播放器是否为nil,如果为空,则创建播放器
    if (player == nil) {
        // 2.1.加载对应的资源
        NSURL *url = [[NSBundle mainBundle] URLForResource:musicName withExtension:nil];
        
        // 2.2.创建播放器
        player = [[AVAudioPlayer alloc] initWithContentsOfURL:url error:nil];
        
        // 2.3.将播放器存入字典
        [_players setObject:player forKey:musicName];
    }
    
    // 3.播放音乐
    [player play];
}

+ (void)pauseMusicWithMusicName:(NSString *)musicName
{
    // 1.从字典中取出之前保存的播放器
    AVAudioPlayer *player = _players[musicName];
    
    // 2.判断播放器是否为空,如果不为空,则暂停
    if (player) {
        [player pause];
    }
}

+ (void)stopMusicWithMusicName:(NSString *)musicName
{
    // 1.从字典中取出之前保存的播放器
    AVAudioPlayer *player = _players[musicName];
    
    // 2.判断播放器是否为空,如果不为空,则停止音乐
    if (player) {
        [player stop];
        [_players removeObjectForKey:musicName];
    }
}