NSURLConnection超时

Question

我有一个网络服务。当我点击服务器时，几乎需要1分钟才能得到响应。当我在模拟器中运行应用程序时，在50秒内获得响应null。它不会再等几分钟了。我的代码如下所示。

- (void)functionCalling
{
     functionName = @"productList";
     baseURL = [NSString stringWithFormat:@"http://192.168.0.13/dashly-server/mobile/  Magento-IOS/lib.php?functionName=%@",functionName];
     NSLog(@"%@",dateSelect);
     NSString *baseString = [NSString stringWithFormat:@"&store_url=%@&api_username=%@&api_key=%@&fromDate=%@&toDate=%@",store_url, api_username, api_key, fDate, tDate];
     NSString *completeURL3 = [baseURL stringByAppendingString:baseString];
     NSURL *url3 = [NSURL URLWithString:[completeURL3 stringByAddingPercentEscapesUsingEncoding:NSUTF8StringEncoding]];
     NSLog(@"url is  %@", url3);
     //NSMutableURLRequest *theRequest = [NSMutableURLRequest requestWithURL:url3];
     NSMutableURLRequest *theRequest=[[NSMutableURLRequest alloc]
                                     initWithURL:url3
                                     cachePolicy:NSURLRequestReloadIgnoringCacheData
                                     timeoutInterval:180.0];

     theConnection3 = [NSURLConnection connectionWithRequest:theRequest delegate:self];
     NSLog(@"connection = %@",theConnection3);
     if( theConnection3 )
     {
          //webData = [NSMutableData dataWithData:[completeURL1 dataUsingEncoding:NSUTF8StringEncoding]];
          webData = [NSMutableData dataWithContentsOfURL:url3];
          theRequest.HTTPBody = webData;
          NSLog(@"web response data %@", webData);
          NSString *response3 = [[NSString alloc]initWithData:webData encoding:NSUTF8StringEncoding];
          NSLog(@"response products = %@", response3);
     }
     else
     {
          NSLog(@"theConnection is NULL");
     }

}
#pragma mark
#pragma mark Actions - NSURLConnection Methods

-(void)connection:(NSURLConnection *)connection didReceiveResponse:(NSURLResponse *)response {
    [self->webData  setLength:0];
}
-(void)connection:(NSURLConnection *)connection didReceiveData:(NSData *)data {
    [self->webData appendData:data];
}
-(void)connection:(NSURLConnection *)connection didFailWithError:(NSError *)error {
    NSLog(@"%@" , error);

}
-(void)connectionDidFinishLoading:(NSURLConnection *)connection
{
    NSError *error;
    NSString *resStr = [[NSString alloc]initWithData:webData encoding:NSASCIIStringEncoding];
    NSLog(@"dash response = %@", resStr);
    if ([resStr isEqualToString:@"null"]) {
        UIAlertView *alert = [[UIAlertView alloc]initWithTitle:nil message:@"No Products Today..." delegate:nil cancelButtonTitle:@"Ok" otherButtonTitles: nil];
        [alert show];
    }
    else if ([resStr length]==0)
    {
        UIAlertView *alert = [[UIAlertView alloc]initWithTitle:nil message:@"Web services connection failed..." delegate:nil cancelButtonTitle:@"Ok" otherButtonTitles: nil];
        [alert show];
    }
    else
    {
        id jsonObject3 = [NSJSONSerialization JSONObjectWithData:webData options:kNilOptions error:&error];
        NSArray *array = (NSArray *)jsonObject3;
        for(int i=0;i<[array count];i++)
        {
             dict = [array objectAtIndex:i];
             [productIdArray addObject:[dict objectForKey:@"productId"]];
             [productNameArray addObject:[dict objectForKey:@"name"]];
             [ordersArray addObject:[dict objectForKey:@"nooforders"]];
             [priceArray addObject:[dict objectForKey:@"price"]];

        }
        NSLog(@"product id array %@", productIDArray);
        NSLog(@"name array %@", productNameArray);
        NSLog(@"orders array %@", ordersArray);
        NSLog(@"price array %@", priceArray);
    }    
}

在50秒时点击服务器后，我收到警报＆＃34; Web服务连接失败＆＃34;。即使我发送180秒的时间间隔也不会等待这么长时间。我该如何解决这个问题？我想等到响应来了。我可以在这里使用NSOperationQueue吗？提前谢谢。

Answer 1

一旦被调用-(void)connectionDidFinishLoading:(NSURLConnection *)connection而不是-(void)connection:(NSURLConnection *)connection didFailWithError:(NSError *)error，由于服务器端超时，服务器肯定会终止连接。

您可能收到错误的HTTP状态代码。尝试显示它。但是，您应首先考虑提高服务性能，而不是让系统更长时间地工作。