Question

我是iOS应用程序开发平台的新手，我正在寻找上一个星期的一件事，实际上我的要求是我有一个UITableview的网址很少，而且didselectRowAtIndexPath该歌应该是在后台运行，下载进度显示在另一个选项卡中。

当我点击多个按钮时，会同时下载多首歌曲，并且所有下载进度都会在下一个标签中单独显示，这里我很乐意暂停，恢复和取消特定下载。这是我的要求。我使用AFNetworking但它不清楚请帮助我做必要的事情。我的AFNetworking代码

NSURL *url = [NSURL URLWithString:downLoadedUrlParam];
NSMutableURLRequest *request = [NSMutableURLRequest requestWithURL:url cachePolicy:NSURLRequestUseProtocolCachePolicy timeoutInterval:3600];

NSString *MUSICFile=[DocumentsDirectory stringByAppendingPathComponent:songName];
self.operation = [[AFDownloadRequestOperation alloc] initWithRequest:request targetPath:MUSICFile shouldResume:YES];

[self.operation setCompletionBlockWithSuccess:^(AFHTTPRequestOperation *operation, id responseObject) {
    NSLog(@"Successfully downloaded file to %@", MUSICFile);
    //[ProcessingUrlsArray removeObject:videoString];
} failure:^(AFHTTPRequestOperation *operation, NSError *error) {
    NSLog(@"Error: %@", error);
    if(operation.response.statusCode!= 200) {
        UIAlertView *alertView = [[UIAlertView alloc] initWithTitle:@"Alert" message:@"Error While Downloaded" delegate:nil cancelButtonTitle:@"OK" otherButtonTitles:nil];
        [alertView show];
    }
}];

[httpClient enqueueHTTPRequestOperation:self.operation];

[self.operation setProgressiveDownloadProgressBlock:^(NSInteger bytesRead, long long totalBytesRead, long long totalBytesExpected, long long totalBytesReadForFile, long long totalBytesExpectedToReadForFile) {
    float percentDone = totalBytesReadForFile/(float)totalBytesExpectedToReadForFile;
    NSLog(@"------%@",[NSString stringWithFormat:@"CUR : %lli M",totalBytesReadForFile/1024/1024]);
    NSLog(@"------%@",[NSString stringWithFormat:@"TOTAL : %lli M",totalBytesExpectedToReadForFile/1024/1024]);

    NSLog(@"------%f",percentDone);
    NSLog(@"------%.0f%%",percentDone*100);

    self.myProgressBar.progress=percentDone;

    NSLog(@"Operation%i: bytesRead: %d", 1, bytesRead);
    NSLog(@"Operation%i: totalBytesRead: %lld", 1, totalBytesRead);
    NSLog(@"Operation%i: totalBytesExpected: %lld", 1, totalBytesExpected);
    NSLog(@"Operation%i: totalBytesReadForFile: %lld", 1, totalBytesReadForFile);
    NSLog(@"Operation%i: totalBytesExpectedToReadForFile: %lld", 1, totalBytesExpectedToReadForFile);


    NSLog(@"%@",downLoadedUrlParam);
    self.title=downLoadNameParam;
    NSMutableArray *stgPerst;
    stgPerst=[[NSMutableArray alloc]initWithCapacity:0];
    NSDictionary *dicInfo=[NSDictionary dictionaryWithObjects:@[[NSString stringWithFormat:@"%f",percentDone],downLoadNameParam] forKeys:@[@"heProg",@"heName"]];



    NSLog(@"dict=%@",dicInfo);
    [[NSNotificationCenter defaultCenter] postNotificationName:@"DOWNLOAD_PROGRESS" object:nil userInfo:dicInfo];

}];

下载并发歌曲文件

0 个答案: