IOS 音乐播放器 （附源码）

头文件h

#import <Foundation/Foundation.h>

/*
* 关注路线语音播放类，支持MP3文件的播放
*/

@interface LJVoiceManager : NSObject

- (instancetype)initLJVoiceManager;

//播放
- (void)playAudio;

//暂停
- (void)pauseAudio;

//停止
- (void)stopAudio;

@end


源文件M
#import "LJVoiceManager.h"

@interface LJVoiceManager ()<AVAudioPlayerDelegate>

//必须全局声明，否则没声音
@property (nonatomic, strong)AVAudioPlayer *avAudioPlayer;

@end

@implementation LJVoiceManager

#pragma mark -- dealloc
- (void)dealloc
{

}

- (instancetype)init
{
self = [super init];
if (self)
{
NSAssert(NO, @"请调用initLJVoiceManager方法");
}
return self;
}

#pragma mark -- 初始化
- (instancetype)initLJVoiceManager
{
self = [super init];
if (self)
{
[self configPlayAudio];
}
return self;
}

- (void)configPlayAudio
{
//开启后台播放
[[AVAudioSession sharedInstance] setCategory:AVAudioSessionCategoryPlayback error:nil];

//从budle路径下读取音频文件 lj_attention_voice.aac
NSString *voicePathString = [[NSBundle mainBundle] pathForResource:@"lj_attention_voice" ofType:@"mp3"];

if (voicePathString.length > 0)
{
//把音频文件转换成url格式
NSURL *voiceUrl = [NSURL fileURLWithPath:voicePathString];
//初始化音频类 并且添加播放文件
self.avAudioPlayer = [[AVAudioPlayer alloc] initWithContentsOfURL:voiceUrl error:nil];
//设置代理
self.avAudioPlayer.delegate = self;

//设置初始音量大小
self.avAudioPlayer.volume = 1;//1:声音最大

//设置音乐播放次数 -1为一直循环
//self.avAudioPlayer.numberOfLoops = -1;

//预播放
//[self.avAudioPlayer prepareToPlay];
}
}

#pragma mark -- 播放设置
//播放
- (void)playAudio
{
//1. 有时候会出现一直没声音的情况，这里可以打开下configPlayAudio，重新加载一遍资源文件
// [self configPlayAudio];

//2. 一般情况下，都是有声音的，就按照如下的步骤走既可以
//如果在播放，先停止，再播放
if ([self.avAudioPlayer isPlaying])
{
[self.avAudioPlayer stop];
}

if ([self.avAudioPlayer prepareToPlay])
{
[self.avAudioPlayer play];
}
}

//暂停
- (void)pauseAudio
{
[self.avAudioPlayer pause];
}

//停止
- (void)stopAudio
{
self.avAudioPlayer.currentTime = 0; //当前播放时间设置为0
[self.avAudioPlayer stop];
}

#pragma mark -- AVAudioPlayerDelegate
//播放完成时调用的方法
- (void)audioPlayerDidFinishPlaying:(AVAudioPlayer *)player successfully:(BOOL)flag
{
CHDebugLog(@"audioPlayerDidFinishPlaying---%hhd",flag);

//如果播放完毕，则停止播放器
if (flag)
{
if ([self.avAudioPlayer isPlaying])
{
[self.avAudioPlayer stop];
}
}
}

- (void)audioPlayerDecodeErrorDidOccur:(AVAudioPlayer *)player error:(NSError * __nullable)error
{
CHDebugLog(@"audioPlayerDidFinishPlaying---%@",error);

if ([self.avAudioPlayer isPlaying])
{ //如果发生错误，也停止播放
[self.avAudioPlayer stop];
}
}

//当程序被应用外部打断之后，重新回到应用程序的时候触发。在这里当回到此应用程序的时候，继续播放音乐。
- (void)audioPlayerEndInterruption:(AVAudioPlayer *)player
{
[self.avAudioPlayer play];
}

@end