ios 短音效的使用

#import <Foundation/Foundation.h>

@interface MJAudioTool : NSObject

/**
 *  播放音效
 *
 *  @param filename 音效文件名
 */
+ (void)playSound:(NSString *)filename;

/**
 *  销毁音效
 *
 *  @param filename 音效文件名
 */
+ (void)disposeSound:(NSString *)filename;
@end

#import "MJAudioTool.h"
#import <AVFoundation/AVFoundation.h>

@implementation MJAudioTool

// 字典: filename作为key, soundID作为value
// 存放所有的音频ID
static NSMutableDictionary *_soundIDDict;
+ (void)initialize
{
    _soundIDDict = [NSMutableDictionary dictionary];
}

+ (void)playSound:(NSString *)filename
{
    if (!filename) return;
    
    // 1.从字典中取出soundID
    SystemSoundID soundID = [_soundIDDict[filename] unsignedLongValue];
    if (!soundID) { // 创建
        // 加载音效文件
        NSURL *url = [[NSBundle mainBundle] URLForResource:filename withExtension:nil];
        
        if (!url) return;
        
        // 创建音效ID
        AudioServicesCreateSystemSoundID((__bridge CFURLRef)url, &soundID);
        
        // 放入字典
        _soundIDDict[filename] = @(soundID);
    }
    
    // 2.播放
    AudioServicesPlaySystemSound(soundID);
}

+ (void)disposeSound:(NSString *)filename
{
    if (!filename) return;
    
    SystemSoundID soundID = [_soundIDDict[filename] unsignedLongValue];
    if (soundID) {
        // 销毁音效ID
        AudioServicesDisposeSystemSoundID(soundID);
        
        // 从字典中移除
        [_soundIDDict removeObjectForKey:filename];
    }
}

@end