ASIHTTPRequest-多个请求

Question

我正在开发一个应用程序,它将从Facebook服务器请求一些用户的个人资料图片URL,但我不知道我将拥有多少用户(可能是2或可能是20).我应该使用ASIHTTPRequest循环和同步请求,或API图(使用Facebook SDK for iOS)与循环？

Answer 1

尝试使用ASINetworkQueue.它将允许您创建仍可以异步启动的ASIHTTPRequests队列.例如

- (void)getImages
{
    if(!self.queue)
        self.queue = [[[ASINetworkQueue alloc] init] autorelease];

    NSArray* urlStringsToRequest = [NSArray arrayWithObjects:@"http://www.example.com/image1.png",@"http://www.example.com/image2.png",nil];
    for(NSString* urlString in urlStringsToRequest)
    {
        NSURL *url = [NSURL URLWithString:urlString];
        ASIHTTPRequest *request = [ASIHTTPRequest requestWithURL:url];
        [request setDelegate:self];
        [request setDidFinishSelector:@selector(requestDone:)];
        [request setDidFailSelector:@selector(requestWentWrong:)];
        [self.queue addOperation:request];
    }

    [self.queue go];
}

- (void)requestDone:(ASIHTTPRequest*)req
{
    UIImage* image = [UIImage imageWithData:[req responseData]];

    [imageArray addObject:image];
}

- (void)requestWentWrong:(ASIHTTPRequest*)req
{
    NSLog(@"Request returned an error %@",[req error]);
}