SpriteKit presentScene崩溃应用程序

Question

我使用以下代码在SK场景之间导航：

        SKScene *newScene = [[MyScene alloc] initWithSize:self.size state:state];

        float duration = 1;

        SKTransition *transition = [SKTransition fadeWithDuration:duration];

        [self.view presentScene:newScene transition:transition];

无论我想要呈现的场景类型如何，应用程序每次都会使用EXC_BAD_ACCESS（代码1）崩溃而没有任何僵尸..看起来“现在的场景在xcode6上无法正常工作，它在我之前工作了”从xcode5升级

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编辑：这是initWithSize代码：

-(id)initWithSize:(CGSize)size state:(GameState)state{
    if (self = [super initWithSize:size]) {

    [self setupScene];

    if (state == GameStateLaunch) {

        [self setupLoadingScreen];

        [self switchToLaunch];

    } else if (state == GameStateTutorial || state == GameStateReplay) {

        [self switchToTutorial];

    } else if (state== GameStateMainMenu) {


        [self switchToMainMenu];
    }

}
    return self;
}

我设法通过在呈现新场景之前移除所有孩子来使其部分工作：

- (void)cleanUpChildrenAndRemove {
    for (SKNode *child in self.children) {
        [child removeFromParent];
    }
    [self removeFromParent];
}

然而，这很疯狂。必须有更好的解决方案！