用AFNetworking库获取远端的JSON数据，其PHP文件需要增加 header('Content-type: application/json');

gistfile1.m

    NSURL *url = [NSURL URLWithString:@"http://localhost:8080/tce/testsuites/json-sample.php"];
    NSURLRequest *request = [NSURLRequest requestWithURL:url];
    AFJSONRequestOperation *operation = [AFJSONRequestOperation JSONRequestOperationWithRequest:request success:^(NSURLRequest *request, NSHTTPURLResponse *response, id JSON) {
        NSLog(@"success: %@",[JSON valueForKey:@"name"]);
    } failure:^(NSURLRequest *request, NSHTTPURLResponse *response, NSError *error, id JSON) {
        NSLog(@"fail: %@", [error userInfo]);
    }];
    [operation start];