KVC的KEYPATH取值

NSString *url1  = @"http://api.kaolafm.com/api/v3.1/radio/playlist?";
    NSMutableDictionary *pamsdict = [NSMutableDictionary dictionary];
    //    radioid=1200000000225;
    pamsdict[@"radioid"] = rid;
    AFHTTPRequestOperationManager *manager = [AFHTTPRequestOperationManager manager];
    //申明返回的结果是json类型
    manager.responseSerializer = [AFJSONResponseSerializer serializer];
    
    
    //申明返回的结果是json类型
    manager.responseSerializer = [AFJSONResponseSerializer serializer];
    [manager GET:url1 parameters:pamsdict success:^(AFHTTPRequestOperation *operation, id responseObject) {
        //        NSLog(@"%@\n 成功",responseObject);
         NSLog(@"%@",[NSThread currentThread]);
//        NSDictionary *dict = responseObject;
//        NSDictionary *dict2 = dict[@"result"];
//        NSArray *objarr = dict2[@"dataList"];
        
        //KVC牛逼之处，上面是笨方法
        NSArray *objarr = [responseObject valueForKeyPath:@"result.dataList"];
        //        NSLog(@"%@",objarr[0]);
        [self.ProfileArr removeAllObjects];
        for ( NSDictionary *channeldict in objarr)
        {
            ProfileMusic *pMusuic = [ProfileMusic ProfileWithDict:channeldict ];
            [self.ProfileArr addObject:pMusuic];
        }
        _sortedArr = [self.ProfileArr sortedArrayWithOptions:NSSortConcurrent usingComparator:^NSComparisonResult(id obj1, id obj2) {
            ProfileMusic *Proobj1 = obj1;
            ProfileMusic *Proobj2 = obj2;
            int nu1 = [Proobj1.orderNum intValue];
            int nu2 = [Proobj2.orderNum intValue];
            if (nu1 > nu2) {
                return NSOrderedAscending;
            }else if (nu1 == nu2){
                return NSOrderedSame;
            }else{
                return  NSOrderedDescending;
            }
            
        }];
       
        [self.tableView reloadData];
        [self.urc endRefreshing];
        
      
        
    } failure:^(AFHTTPRequestOperation *operation, NSError *error) {
        
        NSLog(@"%@\n失败",error);
    }];