相关疑难解决方法(0)

我正在调查AFNetworking作为替代品ASIHTTPRequest,并注意到它是否支持后台下载/上传完全缺乏信息.

使用ASIHTTPReqeust对象,您所要做的就是调用[request setShouldContinueWhenAppEntersBackground:YES],请求将在后台继续.这有什么支持AFNetworking吗？

我可以在后台进行应用程序处理,还是只是处于休眠状态直到它被带到前台？我可以让它发出http请求吗？

在我的应用程序中,我从服务器下载音频文件,当应用程序在前台时,当我单击主页按钮或锁定按钮强制应用程序转到后台时,文件会正常下载,然后一段时间后,下载是停了,错误来了1005 network connection lost.有什么问题？任何人都可以解释这个问题吗？

码:

     NSURL *url = [NSURL URLWithString:currentURL];
            NSURLRequest *theRequest = [NSURLRequest requestWithURL:url         cachePolicy:NSURLRequestReloadIgnoringLocalCacheData  timeoutInterval:60];
            receivedData = [[NSMutableData alloc] initWithLength:0];
            NSURLConnection * connection = [[NSURLConnection alloc] initWithRequest:theRequest delegate:self     startImmediately:YES];
            myConnection = connection;            
            NSLog(@"%@ Download Started", currentURL);


- (void) connection:(NSURLConnection *)connection didReceiveResponse:(NSURLResponse *)response {
    [UIApplication sharedApplication].networkActivityIndicatorVisible = YES;
    [receivedData setLength:0];
    expectedBytes = [response expectedContentLength];
}

- (void) connection:(NSURLConnection *)connection didReceiveData:(NSData *)data {
    [receivedData appendData:data];
    float progressive = (float)[receivedData length] / (float)expectedBytes;
    [downloadProgressView setProgress:progressive];
    NSInteger val = progressive*100; …