音频播放

#import <Foundation/Foundation.h>

@interface ShortMusicPlayTool : NSObject

 + (void)playShortMusicWithFileName:(NSString *)fileName;

+ (void)disposeShortMusicWithFileName:(NSString *)fileName;

@end

ShortMusicPlayTool.m文件

#import "ShortMusicPlayTool.h"

#import <AVFoundation/AVFoundation.h>

 @implementation ShortMusicPlayTool

static NSMutableDictionary *_soundIDs;

+ (NSMutableDictionary *)soundIDs

{

    if (!_soundIDs) {

        _soundIDs = [NSMutableDictionary dictionaryWithCapacity:0];

    }

    return _soundIDs;

}

 // 播放

+ (void)playShortMusicWithFileName:(NSString *)fileName

{

    if (fileName == nil) {

        return;

    }

    SystemSoundID soundID = [[self soundIDs][fileName] unsignedIntValue];

    if (!soundID) {

        NSURL *url = [[NSBundle mainBundle] URLForResource:fileName withExtension:nil];

        if (!url) {

            return;

        }

        AudioServicesCreateSystemSoundID((__bridge CFURLRef _Nonnull)(url), &soundID);

    }

    AudioServicesPlaySystemSound(soundID);

}

// 销毁

+ (void)disposeShortMusicWithFileName:(NSString *)fileName

{

    if (fileName == nil) {

        return;

    }

      SystemSoundID soundID = [[self soundIDs][fileName] unsignedIntValue];

    if (soundID) {

        return;

    }

    AudioServicesDisposeSystemSoundID(soundID);

    [[self soundIDs] removeObjectForKey:fileName];

}

@end

ViewController.m文件中

随机播放

[ShortMusicPlayTool playShortMusicWithFileName:[NSString stringWithFormat:@"m_%02d.wav",arc4random_uniform(14)+3]];

利用AudioServicesPlaySystemSound播放音乐, 但是注意: 真实开发中不建议使用该函数播放音乐（.aac）

在内存警告中销毁

- (void)didReceiveMemoryWarning

{

    [ShortMusicPlayTool disposeAudioWithFilename:@"buyao.wav"];

}

#import <AVFoundation/AVFoundation.h>框架

AVPlayer 音乐播放器

PKPlayerManager.h文件中

#import <Foundation/Foundation.h>

#import <AVFoundation/AVFoundation.h>

// 保存播放的类型

typedef NS_ENUM(NSInteger, PlayType) {

    // 单曲循环

    PlayTypeSingle,

    // 列表播放

    PlayTypeList,

    // 随机播放

    PlayTypeRandom

};

@interface PKPlayerManager : NSObject

// 总时间

@property (nonatomic, assign, readonly) NSUInteger finishTime;

// 当前时间

@property (nonatomic, assign, readonly) NSUInteger currentTime;

// 播放类型

@property (nonatomic, assign) PlayType playType;

@property (nonatomic, strong) AVPlayer *avPlayer;  //音乐播放器

// 单例

+ (instancetype)sharedManager;

// 播放地址的数组

- (void)setManagerMusicArray:(NSArray *)array;

// 下一首的方法

- (void)nextMusic;

// 上一首的方法

- (void)beforeMusic;

// 播放/暂停

- (void)playAndPause;

// 跳转时间

- (void)seekToTime:(NSUInteger)time;

// 停止

- (void)stop;

// 根据外界传的下标来播放

- (void)playWithIndex:(NSInteger)index;

@end

 #import "PKPlayerManager.h"

@interface PKPlayerManager()

@property (nonatomic, strong) NSArray *musicArray; //用来保存音乐地址的数组

@property (nonatomic, assign) NSInteger playIndex;

@end

@implementation PKPlayerManager

- (instancetype)init

{

    self = [super init];

    if (self) {

        _avPlayer = [[AVPlayer alloc] init];

    }

    return self;

}

+ (instancetype)sharedManager

{

    static PKPlayerManager *manager = nil;

    static dispatch_once_t onceToken;

    dispatch_once(&onceToken, ^{

        manager = [[PKPlayerManager alloc] init];

    });

    return manager;

}

// 给音乐器设置播放音乐的地址的数组

- (void)setManagerMusicArray:(NSArray *)array

{

    _musicArray = array; 

}

// 根据外界传的下标来播放

- (void)playWithIndex:(NSInteger)index

{

    _playIndex = index;//保存当前播放第几首歌

    NSURL *musiceURL = [NSURL URLWithString:_musicArray[index]];

    // 根据传过来的下标选择数组里响应的播放地址

    AVPlayerItem *item = [[AVPlayerItem alloc] initWithURL:musiceURL];

    // 把播放器的播放地址替换成新地址

    [_avPlayer replaceCurrentItemWithPlayerItem:item];

    [_avPlayer play];

}

// 下一首的方法

- (void)nextMusic

{

    _playIndex++;

    if (_playIndex == _musicArray.count) {

        _playIndex = 0;

    }

    // 随机播放 随机给一个下标

    if (_playType == PlayTypeRandom) {

        _playIndex = arc4random() %_musicArray.count;

    }

    [self playWithIndex:_playIndex];

}

// 上一首的方法

- (void)beforeMusic

{

    _playIndex--;

    if (_playIndex < 0) {

        _playIndex = _musicArray.count - 1;

    }

    // 随机播放 随机给一个下标

    if (_playType == PlayTypeRandom) {

        _playIndex = arc4random() %_musicArray.count;

    }

    [self playWithIndex:_playIndex];

}

// 播放/暂停

- (void)playAndPause

{

    // 0.0表示停止播放状态 1.0正在播放

    if (_avPlayer.rate == 0.0) {

        [_avPlayer play];

    }else{

        [_avPlayer pause];

    }

}

//总时间

- (NSUInteger)finishTime

{

    CMTime time =  _avPlayer.currentItem.duration;

    if (time.timescale == 0) {

        return 0;

    }

    return time.value / time.timescale;

}

// 当前时间

- (NSUInteger)currentTime

{

    CMTime time = _avPlayer.currentTime;

    if (time.timescale == 0) {

        return 0;

    }

    return time.value / time.timescale;

}

// 跳转时间

- (void)seekToTime:(NSUInteger)time

{

    CMTime newTime = _avPlayer.currentTime;

    // 秒 = value / 基数

    newTime.value = newTime.timescale*time;

    [_avPlayer seekToTime:newTime];

}

// 停止

- (void)stop

{

    [self seekToTime:0];

    [_avPlayer pause];

}

@end

3 下载

协议

<NSURLSessionDelegate,NSURLConnectionDataDelegate>

@property (nonatomic, strong) NSURLSession *session;

@property (nonatomic, strong) NSURLSessionDownloadTask *task;

//开始下载

- (void)beginDownloadRequest:(PKRadioDetailModel *)model

{

    NSURLSessionConfiguration *sessionConfiguration = [NSURLSessionConfiguration defaultSessionConfiguration];

    _session = [NSURLSession sessionWithConfiguration:sessionConfiguration delegate:self delegateQueue:nil];

    self.task = [_session downloadTaskWithRequest:[NSURLRequest requestWithURL:[NSURL URLWithString:model.playInfo.musicUrl]]];

    [self.task resume];

}

- (void)URLSession:(NSURLSession *)session downloadTask:(NSURLSessionDownloadTask *)downloadTask didFinishDownloadingToURL:(NSURL *)location{

    //location是已经下载完成的文件的位置

    //通过这种方式下载的文件会被保存到一个临时文件夹里，我需要用的话应该放到我们自己的文件夹里,下载好的文件都是tmp后缀的文件

    NSLog(@"%@", location);

    //创建一个文件管理

    NSFileManager *manager = [NSFileManager defaultManager];

    NSString *fileName = [location lastPathComponent];

     //tmp文件不能播放可以换一个后缀

    NSString *newFileName = [fileName stringByReplacingOccurrencesOfString:@"tmp" withString:@"mp3"];

    //获取Document路径

    NSURL *documentURL = [[manager URLsForDirectory:NSDocumentDirectory inDomains:NSUserDomainMask] firstObject];

    //拼接新文件的储存路径

    NSURL *newFilePath = [documentURL URLByAppendingPathComponent:newFileName];

    //使用文件管理类，把临时文件夹里的文件拷贝到新创建的Document目录下

    [manager copyItemAtURL:location toURL:newFilePath error:nil];

    //使用文件管理类手动移除临时文件夹的文件

    [manager removeItemAtURL:location error:nil];

    NSLog(@"%@", newFilePath);

}

- (void)URLSession:(NSURLSession *)session downloadTask:(NSURLSessionDownloadTask *)downloadTask didWriteData:(int64_t)bytesWritten totalBytesWritten:(int64_t)totalBytesWritten totalBytesExpectedToWrite:(int64_t)totalBytesExpectedToWrite{

    [self setDownProgress:1.0*totalBytesWritten / totalBytesExpectedToWrite];

}

- (void)setDownProgress:(double)progress

{

    // 注意:因为下载是在子线程中 需要回到主线程刷新数据

    dispatch_async(dispatch_get_main_queue(), ^{

        UIProgressView *progressView = (UIProgressView *)[self.view viewWithTag:self.row+900];

         progressView.progress = progress;

        UILabel *currentPressLabel = (UILabel *)[self.view viewWithTag:self.row+700];

        currentPressLabel.text = [@"下载进度:" stringByAppendingFormat:@"%.2f%%",progress*100];

        if (progress == 1) {

            UIButton *button = (UIButton *)[self.view viewWithTag:self.row+800];

            [button setBackgroundImage:[UIImage imageNamed:@"iconfont-xiazaiwancheng.png"] forState:UIControlStateNormal];

        }

    });

}

后台播放音乐

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