#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