使用iOS圖形API攤位從Facebook獲取分數

Question

我從Friendsmash Facebook示例開始，如果之前未設置分數，則無法獲得分數。 代碼如下。 如果調用此方法，它只會停在FBRequestConnection上，並且不會產生錯誤或任何結果，因此該塊中不會再執行任何代碼。 顯然，這是不可接受的。

如果我在未首先檢查其值的情況下發布分數，則它會很好地發布，然后可以正確檢查其值。 我認為如果根本沒有設置分數，則通話不應該掛起，還是應該不檢查分數並始終發布？

void FB_Controller::FB_SendScore(const int nScore)
{
    // Make sure we have write permissions
    FB_RequestWritePermissions();

    NSMutableDictionary* params =   [NSMutableDictionary dictionaryWithObjectsAndKeys:
                                        [NSString stringWithFormat:@"%d", nScore], @"score",
                                        nil];

    NSLog(@"Fetching current score");

    // Get the score, and only send the updated score if it's highter
    [FBRequestConnection startWithGraphPath:[NSString stringWithFormat:@"%llu/scores", m_uPlayerFBID] parameters:params HTTPMethod:@"GET" completionHandler:^(FBRequestConnection *connection, id result, NSError *error) {

        if(error)
        {
            NSLog(@"ERROR getting score %@", error);
        }
        else if (result && !error) {

            int nCurrentScore = [[[[result objectForKey:@"data"] objectAtIndex:0] objectForKey:@"score"] intValue];

            NSLog(@"Current score is %d", nCurrentScore);

            if (nScore > nCurrentScore) {

                NSLog(@"Posting new score of %d", nScore);

                [FBRequestConnection startWithGraphPath:[NSString stringWithFormat:@"%llu/scores", m_uPlayerFBID] parameters:params HTTPMethod:@"POST" completionHandler:^(FBRequestConnection *connection, id result, NSError *error) {

                    if(error)
                    {
                        NSLog(@"ERROR posting score %@", error);
                    }
                    else
                        NSLog(@"Score posted");
                }];
            }
            else {
                NSLog(@"Existing score is higher - not posting new score");
            }
        }

        }];

    // Send our custom OG
    //FB_SendOG();
}

Answer 1

我剛遇到這個問題：

當用戶尚未向Facebook提交您的應用程序的任何分數時，從[result objectForKey：@“ data”]返回的詞典為空。 這將導致objectAtIndex引發異常。 無論如何，我只是替換了：

int nCurrentScore = [[[[result objectForKey:@"data"] objectAtIndex:0] objectForKey:@"score"] intValue];

附：

int nCurrentScore = 0;
if ([[result objectForKey:@"data"] count]) {
    nCurrentScore = [[[[result objectForKey:@"data"] objectAtIndex:0] objectForKey:@"score"] intValue];
}