ios - AFHTTPRequestOperation 同步请求

Question

我有这样一种情况，我需要向服务器发出多个请求，而后续请求将取决于先前的请求

1) request 1
2) process data
3) request 2 based on data in step 2
4) process data

对于 AFNetworking 2，解决这个问题的最佳方法是什么

Answer 1

在第一个请求的完成处理程序中调用第二个请求。下面是一些示例代码:

AFHTTPRequestOperationManager *manager = [AFHTTPRequestOperationManager manager];
[manager GET:@"http://example.com/resources.json" parameters:nil success:^(AFHTTPRequestOperation *operation, id responseObject) {
    NSLog(@"JSON Response 1: %@", responseObject);

    // Process data here, and use it to set parameters or change the url for request2 below

    [manager GET:@"http://example.com/request2.json" parameters:nil success:^(AFHTTPRequestOperation *operation, id responseObject) {
      NSLog(@"JSON Response 2: %@", responseObject);
    } failure:^(AFHTTPRequestOperation *operation, NSError *error) {
      NSLog(@"Error 2: %@", error);
    }];
  } failure:^(AFHTTPRequestOperation *operation, NSError *error) {
    NSLog(@"Error 1: %@", error);
}];