变量不是类的静态成员 [英] Variable is not a static member of class

问题描述

我正在研究GameKitHelper类，它主要是用C ++编写的，但是在某些地方，也可以在.mm文件中使用Objective-C.

I'm working on a GameKitHelper class, and it's mostly written in C++, but with Objective-C in some places as well, inside an .mm file.

我删除了一些隔离错误的功能:

I removed a bit of functionality to isolate the error:

void GameKitHelper::PopulateFriendScores(DynArray<GameCenterScore> *FriendScores)
{
    GKLeaderboard *leaderboardRequest = [[GKLeaderboard alloc] init];
    if (leaderboardRequest != nil)
    {
        leaderboardRequest.playerScope = GKLeaderboardPlayerScopeFriendsOnly;
        leaderboardRequest.timeScope = GKLeaderboardTimeScopeAllTime;
        leaderboardRequest.range = NSMakeRange(1,25);

        [leaderboardRequest loadScoresWithCompletionHandler: ^(NSArray *scores, NSError *error) 
         {
             int i = 0;
             printf("%d", i);
         }];
    }
}

我在这里遇到的错误是:

The error I get here is:

'int GameKitHelper::i' is not a static member of 'class GameKitHelper'

推荐答案

这是gcc错误.请参阅 Objective-C ++块与Objective-C块中的其中之一报告.

This is a gcc bug. See Objective-C++ block vs Objective-C block for one of many reports of it.

< soapbox>我建议尽可能避免使用Objective-C ++.编译起来很慢，运行起来很with肿(特别是使用ARC，因为它打开了 -fobjc-arc-exceptions )，编译器和调试器中的错误程序，而根据我的经验，在给这两个世界带来不利影响的情况下，大部分情况都是一团糟. C ++很好. Objective-C很好.只要保持它们之间的接口尽可能小即可. </soapbox>

<soapbox>I recommend avoiding Objective-C++ as much as possible. It's slow to compile, bloated to run (particularly with ARC since it turns on -fobjc-arc-exceptions), buggy in the compiler and the debugger, and mostly a mess in my experience giving the worst of both worlds. C++ is fine. Objective-C is fine. Just keep the interface between them as small as possible. </soapbox>

但是切换到clang 2.0可能会解决此特定问题.

But switching to clang 2.0 might fix this specific problem.

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