ios - 如何获取在NsData中下载的音频文件？

Question

在我的项目中，我有音频网址...看我的代码...。

ViewController.h

#import <UIKit/UIKit.h>

#import <AVFoundation/AVFoundation.h>


@interface ViewController : UIViewController<AVAudioPlayerDelegate,NSURLConnectionDelegate>


{


    AVAudioPlayer *song;


   // NSMutableData *fileData;


    NSData *myData;


   }


 @property (nonatomic, retain) AVAudioPlayer *song;


@property(nonatomic,retain) NSData *myData;


@end

ViewController.m

#import "ViewController.h"


@interface ViewController ()


@end

@implementation ViewController

@synthesize song,myData;


- (void)viewDidLoad

{

    [super viewDidLoad];

    NSURL *myUrl;

    myUrl = [NSURL URLWithString:@"http://p0.bcbits.com/download/track/60523f9784a2912348eff92f7b7e21e8/mp3-128/1269403107?c22209f7da1bd60ad42305bae71896761f6cd1f4d6c29bf401ef7e97b90c3d5939b57f5479b37ad4d41c48227740d7ba8b5f79b76aa8d6735b8f87c781f44fb019762a2903fe65aeafb30d90cb56b385e27cd770cc9f9d60e5ea3f130da6ad3db728ff7e24a09fab9f351120810ee91f78f1e94fcabc98aabb37d4248358f6da4a0fa7a74fe8c89da2a768&fsig=cd06c325fc41b6f8edb0409011e8839c&id=1269403107&stream=1&ts=1395489600.0"];


    myData = [NSData dataWithContentsOfURL:myUrl];



}




- (void)didReceiveMemoryWarning

{

    [super didReceiveMemoryWarning];


    // Dispose of any resources that can be recreated.
}

@end

在上面的代码中如何将mydata转换为一个数组？
或如何下载此音频并将其存储在手机内存中？

Answer 1

您可以将音频数据存储到设备内存中，如下所示

myData = [NSData dataWithContentsOfURL:myUrl];

[myData writeToFile:[NSHomeDirectory() stringByAppendingPathComponent:@"Documents/audio.mp3"] atomically:YES];

播放保存在设备中的音频文件:

将 AudioToolbox.framework和 AVFoundation.framework添加到您的项目构建中

在.h文件中

#import <AudioToolbox/AudioToolbox.h>

#import <AVFoundation/AVFoundation.h>

AVAudioPlayer *player;

在.m文件中

-(void)initPlayer
{
    AVAudioSession *audioSession = [AVAudioSession sharedInstance];

    UInt32 audioRouteOverride = kAudioSessionOverrideAudioRoute_Speaker;     

    AudioSessionSetProperty (kAudioSessionProperty_OverrideAudioRoute,sizeof (audioRouteOverride),&audioRouteOverride);

    NSError *err;

    [audioSession setCategory:AVAudioSessionCategoryPlayAndRecord error:&err];

    audioSession.delegate = self;

    [audioSession setActive:YES error:&err];

    player = [[AVAudioPlayer alloc]initWithContentsOfURL:[NSURL fileURLWithPath:[NSHomeDirectory() stringByAppendingPathComponent:@"Documents/audio.mp3"]] error:nil];

}

-(void)playFile
{   

    if (player.playing)
    {
        [player pause];

        isPlaying = NO;

    }
    else
    {               
        [player play];

        isPlaying = YES;

    }

}

谢谢!