すべてを統合する - 全期間のリーダーボード - (Unreal Engine モジュール)

Last updated on May 30, 2024

Connect the UI to display leaderboard rankings

1. Open the LeaderboardAllTimeWidget_Starter class CPP file, navigate to the GetRankings() function, and replace the current code with the code below. It will get the leaderboard rankings using the LeaderboardSubsystem_Starter and then display it upon completion.

   void ULeaderboardAllTimeWidget_Starter::GetRankings()
   {
       FUniqueNetIdRepl PlayerNetId = GetOwningPlayer()->GetLocalPlayer()->GetPreferredUniqueNetId();
       if (!PlayerNetId.IsValid()) 
       {
           return;
       }
   
       Ws_Leaderboard->SetWidgetState(EAccelByteWarsWidgetSwitcherState::Loading);
   
       LeaderboardSubsystem->GetRankings(
           GetOwningPlayer(), 
           LeaderboardCode,
           ResultLimit,
           FOnGetLeaderboardRankingComplete::CreateWeakLambda(this, [this, PlayerNetId](bool bWasSuccessful, const TArray<ULeaderboardRank*>   Rankings)
           {
               if (!bWasSuccessful) 
               {
                   Ws_Leaderboard->SetWidgetState(EAccelByteWarsWidgetSwitcherState::Empty);
                   return;
               }
   
               // Add rankings to the leaderboard ranking list.
               Lv_Leaderboard->SetListItems(Rankings);
   
               // Get the logged-in player's rank if it is not included in the leaderboard.
               const TArray<ULeaderboardRank*> FilteredRank = Rankings.FilterByPredicate([PlayerNetId](const ULeaderboardRank* Temp) { return  Temp && Temp->UserId == PlayerNetId; });
               const ULeaderboardRank* PlayerRank = FilteredRank.IsEmpty() ? nullptr : FilteredRank[0];
               if (!PlayerRank)
               { 
                   GetPlayerRanking();
               }
               // Display the rankings if it is not empty.
               else 
               {
                   DisplayPlayerRank(PlayerRank);
                   Ws_Leaderboard->SetWidgetState(
                       Lv_Leaderboard->GetNumItems() <= 0 ?
                       EAccelByteWarsWidgetSwitcherState::Empty :
                       EAccelByteWarsWidgetSwitcherState::Not_Empty);
               }
           }
       ));
   }

2. Navigate to GetPlayerRanking() and replace the current code with the code below. It will only be called if the currently logged-in player is not included in the rankings retrieved by the GetRankings() function.

   void ULeaderboardAllTimeWidget_Starter::GetPlayerRanking()
   {
       LeaderboardSubsystem->GetPlayerRanking(
           GetOwningPlayer(),
           LeaderboardCode,
           FOnGetLeaderboardRankingComplete::CreateWeakLambda(this, [this](bool bWasSuccessful, const TArray<ULeaderboardRank*> Rankings)
           {
               // Get and display the logged-in player's rank.
               DisplayPlayerRank((!bWasSuccessful || Rankings.IsEmpty()) ? nullptr : Rankings[0]);
   
               // Display the rankings if it is not empty.
               Ws_Leaderboard->SetWidgetState(
                   Lv_Leaderboard->GetNumItems() <= 0 ?
                   EAccelByteWarsWidgetSwitcherState::Empty :
                   EAccelByteWarsWidgetSwitcherState::Not_Empty);
           }
       ));
   }

Resources

• The files used in this tutorial section are available in the Unreal Byte Wars GitHub repository.

  • AccelByteWars/Source/AccelByteWars/TutorialModules/Engagement/LeaderboardEssentials/UI/LeaderboardAllTimeWidget_Starter.h
  • AccelByteWars/Source/AccelByteWars/TutorialModules/Engagement/LeaderboardEssentials/UI/LeaderboardAllTimeWidget_Starter.cpp