游戏fps关闭

Question

我为 Game Over Scene 创建了视图控制器。当我从 Game Over ViewController 重新启动游戏时，fps 正在关闭。第一次我的fps是30+，当我重新开始游戏时它关闭到20，我再次重新启动它关闭到10...... 有时我会看到这个错误：对 GameOverViewController 的开始/结束外观转换的不平衡调用：0x9bb8490>。

ViewController.m

- (void)awakeFromNib {
[[NSNotificationCenter defaultCenter]
 addObserver:self
 selector:@selector(goToGameOverViewController:)
 name:@"GoToGameOverViewController"
 object:nil];
}

-(void)goToGameOverViewController:(NSNotification *) notification {
GameOverViewController *gameOverController = [self.storyboard   instantiateViewControllerWithIdentifier:@"GameOverViewController"];

[self.navigationController pushViewController:gameOverController animated:NO];
 }
------------------------------------------------------------------------------

MyScene.m


- (void)gameOver {
[[NSNotificationCenter defaultCenter]
 postNotificationName:@"GoToGameOverViewController" object:self];
}

---

GameOverView.m


-(void)playPressed
{
GameViewController *gameController = [self.storyboard instantiateViewControllerWithIdentifier:@"GameViewController"];

[self.navigationController pushViewController:gameController animated:YES];
}

-(void)createPlayButton
{
UIButton *playBtn = [UIButton buttonWithType:UIButtonTypeRoundedRect];
[self.view addSubview:playBtn];

playBtn.frame = CGRectMake(100, 100, 200, 44);
[playBtn setTitle:@"Play Again" forState:UIControlStateNormal];
[playBtn sizeToFit];
[playBtn addTarget:self action:@selector(playPressed)  forControlEvents:UIControlEventTouchUpInside];
}

Answer 1

您的代码和方法存在几个核心问题：

1. 您不断地将UIViewControllers 推送到您的UINavigationController。取而代之的是，也许在一场比赛结束后，你打电话给popToRootViewControllerAnimated: 或其他。您在堆栈上推送的每个 UIViewController 都会永远存在。
2. 您永远不会从NSNotificationCenter 中删除观察者。这意味着每次你完成一个关卡时，每个 viewController 都会尝试推送一个 GameOver viewController。这就是导致“不平衡......”警告的原因。如果您遵循我在 #1 中的建议，您应该只需要覆盖 dealloc 并调用以下代码来解决该问题。

在playPressed 中使用此代码：

GameViewController *gameController = [self.storyboard instantiateViewControllerWithIdentifier:@"GameViewController"];
[self.navigationController setViewControllers:@[gameController] animated:YES];

稍后在GameViewController

-(void)dealloc
{
    [[NSNotificationCenter defaultCenter] removeObserver:self]
}

这将确保您的 ViewController 以及您的场景被释放，并且您没有多个 ViewController 试图同时推送游戏。

Answer 2

确保您在从ViewController 离开时释放您的SKScene：

-(void)goToGameOverViewController:(NSNotification *) notification {
    [((SKView *)self.view) presentScene:nil];

    GameOverViewController *gameOverController = [self.storyboard   instantiateViewControllerWithIdentifier:@"GameOverViewController"];

    [self.navigationController pushViewController:gameOverController animated:NO];
}