直接可以使用

------------------------------------ .h文件 ----------------------------------

import <Foundation/Foundation.h>

import <AVFoundation/AVFoundation.h>

NS_ASSUME_NONNULL_BEGIN

@interface CEMAVAudioPlayer : NSObject
{
AVAudioSession* _audioSession;
}

//第一种
@property(strong,nonatomic) AVPlayer *player;

+(instancetype)sharedInstance;

-(void)play;

-(void)stop;

@end

NS_ASSUME_NONNULL_END

------------------------------------ .m文件 ----------------------------------

import "CEMAVAudioPlayer.h"

@implementation CEMAVAudioPlayer

-(instancetype)init{
if (self = [super init]) {
[[UIApplication sharedApplication] beginReceivingRemoteControlEvents];

    NSURL* url = [NSURL fileURLWithPath:[[NSBundle mainBundle] pathForResource:@"Findphone" ofType:@"mp3"]];
    
    /* 第一种
     if (_player == nil) {
     _player = [[AVPlayer alloc] init];
     _player.volume = 1.0; // 默认最大音量
     }
     // 创建要播放的资源
     AVPlayerItem *playerItem = [[AVPlayerItem alloc]initWithURL:url];
     // 播放当前资源
     [self.player replaceCurrentItemWithPlayerItem:playerItem];
     */
    
    //第二种
    _audioSession = [AVAudioSession sharedInstance];
    [_audioSession setCategory:AVAudioSessionCategoryPlayback withOptions:AVAudioSessionCategoryOptionMixWithOthers error:nil];
    [_audioSession setActive:YES error:nil];
    
    if(!staticAudioPlayer){
        staticAudioPlayer = [[AVAudioPlayer alloc] initWithContentsOfURL:url error:nil];
        [staticAudioPlayer prepareToPlay];
    }
}
return self;

}

static AVAudioPlayer* staticAudioPlayer;
+(instancetype)sharedInstance{
static CEMAVAudioPlayer *instance = nil;
static dispatch_once_t onceToken;
dispatch_once(&onceToken, ^{
instance = [[self alloc] init];
});
return instance;
}

-(void)play{
staticAudioPlayer.volume = 10;
if (!staticAudioPlayer.isPlaying) {
[staticAudioPlayer play];
}

//第一种
//[self.player play];

}

-(void)stop{
staticAudioPlayer.currentTime = 0;
[staticAudioPlayer stop];

//第一种
//[self.player pause];

}

@end