如何等待响应并解析在iOS网络中完成的XML [英] How to wait response and parse XML done in afnetworking iOS

问题描述

我想等到服务器响应并完成XML解析后再调用另一个函数。我怎样才能做到这一点？我使用此代码将请求发送到服务器，并使用NSXMLParser解析XML响应。

I want to wait until server reponse and parse XML done, then call another function. How can i do that? I used this code to send request to server and use NSXMLParser to parse XML response.

NSURL *url1 = [NSURL URLWithString:@"linkserver"];

    AFHTTPClient *httpClient = [[AFHTTPClient alloc] initWithBaseURL: url1] ;
    NSDictionary *params1 = @{
                              @"a" : vd;
                              @"b" : @"all"

                              };

    NSMutableURLRequest *afRequest = [httpClient requestWithMethod:@"GET" path:nil parameters:params1] ;

    AFHTTPRequestOperation *operation = [[AFHTTPRequestOperation alloc] initWithRequest:afRequest];

    [operation  setCompletionBlockWithSuccess:^(AFHTTPRequestOperation *operation, id responseObject) {
        NSLog(@"Success");
        NSString * parsexmlinput = [[NSString alloc] initWithData:responseObject encoding:NSUTF8StringEncoding];

        [self parseXMLFile:parsexmlinput];// parse xml


        [self getItemFromStatus];// wait to call another function at here???

    }
       failure:^(AFHTTPRequestOperation *operation, NSError *error) {
                                          NSLog(@"error: %@", error);

                                      }
     ];
        [httpClient enqueueHTTPRequestOperation:operation];
}

请给我任何建议。非常感谢

Please give me any suggestion. Thanks much

推荐答案

查看本教程 Ray Wenderlich 。

使用块和回调

- (IBAction)xmlTapped:(id)sender{
NSString *weatherUrl = [NSString stringWithFormat:@"[e-mail]?format=xml",BaseURLString];
NSURL *url = [NSURL URLWithString:weatherUrl];
NSURLRequest *request = [NSURLRequest requestWithURL:url];

AFXMLRequestOperation *operation =
[AFXMLRequestOperation XMLParserRequestOperationWithRequest:request
    success:^(NSURLRequest *request, NSHTTPURLResponse *response, NSXMLParser *XMLParser) {

        XMLParser.delegate = self;
        [XMLParser setShouldProcessNamespaces:YES];
        [XMLParser parse];
    }
    failure:^(NSURLRequest *request, NSHTTPURLResponse *response, NSError *error, NSXMLParser *XMLParser) {
        UIAlertView *av = [[UIAlertView alloc] initWithTitle:@"Error Retrieving Weather"
                                                     message:[NSString stringWithFormat:@"%@",error]
                                                    delegate:nil
                                           cancelButtonTitle:@"OK"
                                           otherButtonTitles:nil];
        [av show];
}];

    [operation start]; 
}

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