ios - 为什么我不能将一个 SKScene 添加到另一个 SKScene？

Question

我试图让这个 SKScene 在游戏结束时出现在场景的中间，这样之前的场景在背景中仍然可见(类似于 flappy bird 的结局)。这是我希望它如何显示的图像:

到目前为止，这是我编写的代码:

在游戏场景中:

-(void)dieFrom:(SKNode*)killingDebris {
    _touched = YES;

    if (_touched == YES) {
        beatLevel = YES;
        NSLog(@"touched");

        [self runAction:[SKAction sequence:@[
            [SKAction runBlock:^{
            [_goodSquare removeFromParent];
        }],
            [SKAction runBlock:^{

            level2Achieved = [[NSUserDefaults standardUserDefaults] integerForKey:@"newLevelAchieved"];
            if (beatLevel == YES) {
                level2Achieved = 2;
            }
            [[NSUserDefaults standardUserDefaults] setInteger:level2Achieved forKey:@"newLevelAchieved"];
            [[NSUserDefaults standardUserDefaults] synchronize];
            [self removeAllChildren];
        }],
            [SKAction waitForDuration:1.5],
            [SKAction runBlock:^{

            [self endGame];

        }],
                                                   ]]];

    }
}

-(void)endGame {

    [self removeAllActions];

    gameOverScene *gameOverNode = [[gameOverScene alloc] initWithScore:self.score];
    gameOverNode.gameScene = self;
    gameOverNode.position = CGPointMake(self.scene.size.width/2, -150);
    [self addChild:gameOverNode];

    [gameOverNode runAction:[SKAction moveToY:self.scene.size.height/2 duration:0.6]];
}

在游戏结束的头文件中:

@class testScene;

@interface gameOverScene : SKScene

@property (weak, nonatomic) testScene *gameScene;

-(instancetype)initWithScore:(NSInteger)score;

@end

在游戏结束的实​​现中:

-(instancetype)initWithScore:(NSInteger)score {

    if (self = [super init]) {
        self.userInteractionEnabled = YES;
        self.zPosition = 5.0;

        SKSpriteNode *bg = [SKSpriteNode spriteNodeWithColor:[SKColor redColor] size:CGSizeMake(280, 300)];
        bg.alpha = 0.6;
        [self addChild:bg];
    }
    return self;
}

但这就是我在模拟器上测试时得到的结果:

错误信息如下:

2014-05-11 15:22:05.502 test2[2825:60b] SKScene: Setting the zPosition of a SKScene has no effect.
2014-05-11 15:22:05.503 test2[2825:60b] SKScene: Setting the position of a SKScene has no effect.
2014-05-11 15:22:05.504 test2[2825:60b] SKScene: Animating the position of a SKScene has no effect.

谁能告诉我哪里出错了，我该如何解决？谢谢。如果需要任何额外信息，请告诉我。

Answer 1

Can anyone tell me where I've gone wrong, and how I can fix it?

来自 SKScene reference page 的概述部分:

A scene is the root node in a tree of Sprite Kit nodes (SKNode).

因为一棵树只能有一个根，所以任何 SKNode 图只有一个场景。

要解决此问题，请使用 SKNode(显然不是 SKScene)来包含您的游戏结束显示。然后，您可以将该节点添加到现有场景中。