iphone - AFNetworking发布请求与json反馈

我正在使用AFNetworking并创建需要json反馈的发布请求。下面的代码有效，但是我有两个主要问题；我应该在哪里释放ActivityIndi​​cator Manager？第二个问题是此代码正确，是新代码，我对块感到困惑，所以我真的想知道我是否在正确地做它以获得最佳性能，即使它可以工作。

    NSURL *url = [NSURL URLWithString:@"mysite/user/signup"];
    AFHTTPClient *httpClient = [[AFHTTPClient alloc] initWithBaseURL:url];

    AFNetworkActivityIndicatorManager * newactivity = [[AFNetworkActivityIndicatorManager alloc] init];
    newactivity.enabled = YES;
    NSDictionary *params = [NSDictionary dictionaryWithObjectsAndKeys:
                            usernamestring, @"login[username]",
                            emailstring, @"login[email]",
                            nil];
    NSMutableURLRequest *request = [httpClient requestWithMethod:@"POST" path:@"mysite/user/signup"parameters:params];
    [httpClient release];

    AFJSONRequestOperation *operation = [AFJSONRequestOperation operationWithRequest:request success:^(id json) {

        NSString *status = [json valueForKey:@"status"];
        if ([status isEqualToString:@"success"]) {
            [username resignFirstResponder];
            [email resignFirstResponder];
            [self.navigationController dismissModalViewControllerAnimated:NO];
        }
        else {
            UIAlertView *alert =[[UIAlertView alloc] initWithTitle:@"Login Unsuccessful"
                                                           message:@"Please try again"
                                                          delegate:NULL
                                                 cancelButtonTitle:@"OK"
                                                 otherButtonTitles:NULL];

            [alert show];
            [alert release];
        }

    }

    failure:^(NSHTTPURLResponse *response, NSError *error) {

    NSLog(@"%@", error);
    UIAlertView *alert =[[UIAlertView alloc] initWithTitle:@"Login Unsuccessful"
                                                       message:@"There was a problem connecting to the network!"
                                                      delegate:NULL
                                             cancelButtonTitle:@"OK"
                                             otherButtonTitles:NULL];

        [alert show];
        [alert release];


    }];

    NSOperationQueue *queue = [[[NSOperationQueue alloc] init] autorelease];
    [queue addOperation:operation];
    NSLog(@"check");


}

非常感谢您的提前帮助:)

最佳答案

我知道这个问题有点老了，但我仍然想贡献一点。

正如steveOhh所说，您应该使用[[AFNetworkActivityIndicatorManager sharedManager] setEnabled:YES]打开事件网络指示器。它是singleton，因此不需要您手动进行alloc-init和release。至于另一个问题，我注意到您在块调用中缺少一些参数，而且您也可以执行此操作，这是更简洁的代码:

NSURL *url = [NSURL URLWithString:@"mysite/user/signup"];
AFJSONRequestOperation *operation = [AFJSONRequestOperation JSONRequestOperationWithRequest:[NSURLRequest requestWithURL:url] success:^(NSURLRequest *request, NSHTTPURLResponse *response, id JSON) {
    // your success code here
} failure:^(NSURLRequest *request, NSHTTPURLResponse *response, NSError *error, id JSON) {
    // your failure code here
}];

[operation start]; // start your operation directly, unless you really need to use a queue