////////////////- (void)viewDidLoad{    [super viewDidLoad];    // Do any additional setup after loading the view.        //progress    self.progressIndicator = [[[UIProgressView alloc]initWithFrame:CGRectMake(10, 80, 300, 10)]autorelease];    [self.view addSubview:self.progressIndicator];        ///startBtn    UIButton *startBtn = [UIButton buttonWithType:UIButtonTypeRoundedRect];    startBtn.frame = CGRectMake(20, 100, 100, 60);    [startBtn setTitle:@"Start" forState:UIControlStateNormal];    [startBtn addTarget:self action:@selector(downloadStart:) forControlEvents:UIControlEventTouchUpInside];    [self.view addSubview:startBtn];            UIButton *pauseBtn = [UIButton buttonWithType:UIButtonTypeRoundedRect];    pauseBtn.frame = CGRectMake(200, 100, 100, 60);    [pauseBtn setTitle:@"Pause" forState:UIControlStateNormal];    [pauseBtn addTarget:self action:@selector(downloadPause:) forControlEvents:UIControlEventTouchUpInside];    [self.view addSubview:pauseBtn];    }- (void)downloadStart:(UIButton *)btn{    ///创建请求    self.request = [ASIHTTPRequest requestWithURL:[NSURL URLWithString:@"http://zhangmenshiting.baidu.com/data2/music/35417538/13880429190800192.mp3?xcode=ead0f4d3b15d47b6273650a58d1b4b7f"]];    ///设置代理    self.request.delegate = self;    //进度显示    self.request.downloadProgressDelegate = self.progressIndicator;    ///另一种获取进度的方法，需要遵守ASIProgressDelegate协议    //self.request.downloadProgressDelegate = self;    ///精确显示进度信息    self.request.showAccurateProgress = YES;    //文件存储目录    NSString *savePath = [[NSHomeDirectory() stringByAppendingPathComponent:@"Documents"] stringByAppendingPathComponent:@"safe&sound.mp3"];    NSLog(@"savePath=%@",savePath);    ///文件临时目录    NSString *temp = [[NSHomeDirectory() stringByAppendingPathComponent:@"Documents"] stringByAppendingPathComponent:@"temp"];    //    NSString *tempPath = [temp stringByAppendingPathComponent:@"temp.mp3"];    NSLog(@"tempPaht=%@",tempPath);        //如果临时目录不存在则创建    NSFileManager *fileManager = [NSFileManager defaultManager];    BOOL fileExists = [fileManager fileExistsAtPath:tempPath];    if (!fileExists) {        [fileManager createDirectoryAtPath:temp withIntermediateDirectories:YES attributes:nil error:nil];    }    //设置存储目录    self.request.downloadDestinationPath = savePath;    //设置临时目录    self.request.temporaryFileDownloadPath = tempPath;    //允许断点续传    self.request.allowResumeForFileDownloads = YES;    //下载完毕执行    self.request.didFinishSelector = @selector(FetchDataFinished:);    //下载失败执行    self.request.didFailSelector = @selector(FetchDataFailed:);    //下载信息上下文    self.request.userInfo = [NSDictionary dictionaryWithObjectsAndKeys:@"safe&sound",@"music", nil];    //开始异步下载    [self.request startAsynchronous];        }#pragma mark -- pause method- (void)downloadPause:(UIButton *)btn{    [self.request clearDelegatesAndCancel];}#pragma mark -- request delegate- (void)requestStarted:(ASIHTTPRequest *)request{    NSLog(@"request start");}- (void)request:(ASIHTTPRequest *)request didReceiveResponseHeaders:(NSDictionary *)responseHeaders{    NSLog(@"receive responseHeader");}//- (void)request:(ASIHTTPRequest *)request didReceiveBytes:(long long)bytes//{    //如果自己实现那个进度条，就遵守ASIProgressDelegate 实现此方法即可，获取大小，更新进度条//    NSLog(@"total=%lld",request.totalBytesRead);//    NSLog(@"length=%lld",request.contentLength);//}#pragma mark -- finish & fail- (void)FetchDataFinished:(ASIHTTPRequest *)request{    NSLog(@"finished");    NSLog(@"reqest.userinfo=%@",[request.userInfo objectForKey:@"music"]);}- (void)FetchDataFailed:(ASIHTTPRequest *)request{    NSLog(@"failed");    NSLog(@"error=%@",[request.error localizedDescription]);}