ASIHTTPRequest自定义进度跟踪

Question

我读过关于在documentation中使用ASIHTTPRequest在我的应用程序中实现自定义进度跟踪的文章。它提到了实现两个方法，request:didReceiveBytes:和request:incrementDownloadSizeBy:。我已经将它们添加到我的视图控制器中，但是它们没有被调用。在这一点上，我只是想让示例代码正常工作。

// ViewController.m

- (void)fetchThisURLFiveTimes:(NSURL *)url
{
    [myQueue cancelAllOperations];
    [myQueue setDownloadProgressDelegate:self];
    [myQueue setDelegate:self];
    [myQueue setRequestDidFinishSelector:@selector(queueComplete:)];
    int i;
    for (i=0; i<5; i++) {
        ASIHTTPRequest *request = [ASIHTTPRequest requestWithURL:url];
        request.showAccurateProgress = YES;
        [myQueue addOperation:request];
    }
    myQueue.showAccurateProgress = YES;
    [myQueue go];
}

- (void)queueComplete:(ASINetworkQueue *)queue
{
   NSLog(@"Value: %f", [myProgressIndicator progress]);
}

- (void)request:(ASIHTTPRequest *)request didReceiveBytes:(long long)bytes
{
    NSLog(@"bytes: %lld", bytes);
}

- (void)request:(ASIHTTPRequest *)request incrementDownloadSizeBy:(long long)newLength
{
    NSLog(@"newLength: %lld", newLength);
}

我在这里做错了什么？

Answer 1

哇。因此，放置self.myQueue.showAccurateProgress = YES;行的位置非常重要。它必须添加到行[self.myQueue addOperation:request];之前。以下是对我起作用的方法。

- (void)fetchThisURLFiveTimes:(NSURL *)url
{
    [self.myQueue cancelAllOperations];        
    [self setMyQueue:[ASINetworkQueue queue]];
    [self.myQueue setDownloadProgressDelegate:self];
    [self.myQueue setDelegate:self];
    [self.myQueue setQueueDidFinishSelector:@selector(queueFinished:)];
    self.myQueue.showAccurateProgress = YES;

    int i;
    for (i=0; i<5; i++) {
        ASIHTTPRequest *request = [ASIHTTPRequest requestWithURL:url];
        [self.myQueue addOperation:request];
    }
    [self.myQueue go];
}

- (void)queueFinished:(ASINetworkQueue *)queue
{
    if ([self.myQueue requestsCount] == 0) {
        [self setMyQueue:nil];
    }
    NSLog(@"Queue finished");
}

- (void)setProgress:(float)newProgress {
    NSLog(@"progress: %f", newProgress);
}

想弄清楚这件事简直浪费了6个小时。我希望这能让某些人不那么恼火。