iphone - 带有 json 反馈的 AFNetworking Post 请求

Question

我正在使用 AFNetworking 并创建一个需要 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；在哪里释放 ActivityIndi​​cator 管理器？第二个问题是这段代码是正确的，作为新代码，我对 block 感到困惑，所以我真的想知道我是否在做正确的事情以获得最佳性能，即使它有效。

    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");    


}    

非常感谢您提前提供的帮助:)

Answer 1

我知道这个问题有点老了，但我仍然想做出贡献。

正如 steveOhh 所说，您应该使用 [[AFNetworkActivityIndi​​catorManager sharedManager] setEnabled:YES] 来打开事件网络指示器。这是一个singleton ，因此不需要您手动分配初始化和释放。至于另一个问题，我注意到您在 block 调用中缺少一些参数，而且，您可以这样做，这是更干净的代码:

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