.h文件

#import <Foundation/Foundation.h>

@interface PLMsoundTool : NSObject<NSCopying>

- (void)playSongWithName:(NSString *)name;

+ (instancetype)shareSoundTool;

@end

.m文件

#import "PLMsoundTool.h"

#import <AudioToolbox/AudioToolbox.h>

@interface PLMsoundTool()

@property (nonatomic, strong) NSMutableDictionary *soundList;

@end

@implementation PLMsoundTool

static PLMsoundTool *_instance;

- (NSMutableDictionary *)soundList

{

    if (_soundList == nil) {

        _soundList = [NSMutableDictionary dictionary];

    }

    return _soundList;

}

- (void)playSongWithName:(NSString *)name

{

    SystemSoundID soundId = [self.soundList[name] unsignedIntValue];

    AudioServicesPlaySystemSound(soundId);

}

+ (instancetype)shareSoundTool

{

    static dispatch_once_t onceToken;

    dispatch_once(&onceToken, ^{

        _instance = [[PLMsoundTool alloc]init];

    });

    return _instance;

}

+ (id)allocWithZone:(struct _NSZone *)zone

{

    static dispatch_once_t onceToken;

    dispatch_once(&onceToken, ^{

        _instance = [super allocWithZone:zone];

    });

    return _instance;

}

- (id)init

{

    if (self = [super init]) {

        [self loadAllSounds];

    }

    return self;

}

- (void)loadAllSounds

{

    NSString *path = [[NSBundle mainBundle].bundlePath stringByAppendingPathComponent:@"Sounds.bundle"];

    NSArray *files = [[NSFileManager defaultManager] contentsOfDirectoryAtPath:path error:nil];

    [files enumerateObjectsUsingBlock:^(NSString *fileName, NSUInteger idx, BOOL *stop) {

        SystemSoundID soundId = [self creatSoundIdWithFileName:fileName];

        [self.soundList setObject:@(soundId) forKey:fileName];

    }];

}

- (SystemSoundID)creatSoundIdWithFileName:(NSString *)fileName

{

    SystemSoundID soundId = 0;

    NSURL *url = [[NSBundle mainBundle] URLForResource:fileName withExtension:nil subdirectory:@"Sounds.bundle"];

    AudioServicesCreateSystemSoundID((__bridge CFURLRef)(url), &soundId);

    return soundId;

}

- (id)copyWithZone:(struct _NSZone *)zone

{

    return _instance;

}

#pragma mark - MRC需要重写的方法，目的就是覆盖系统默认的内存管理方法

// 让MRC的程序代码和ARC的共存！

#if !__has_feature(objc_arc)

- (id)retain { return self; }

- (id)autorelease { return self; }

- (NSUInteger)retainCount { return UINT_MAX; }

- (oneway void)release{}

#endif

@end