ios – Sprite工具包在移动父SKNode后找不到nodeAtPoint

我在Sprite Kit中遇到了这个奇怪的问题.我正在使用NodeAtPoint和categoryBitMask来检测玩家在调用跳转方法时是否触地.

一切都在发挥作用.但是 – 为了在抽屉中显示一些可选按钮 – 当我使用SKAction moveTo移动父节点时：CGPoint(我将地面和玩家都作为SKNode的子节点),玩家不会跳跃.我NSLog pointBelowPlayer,它和以前一样,但是blockNode.physicsBody是null！这可能是Sprite Kit中的一个错误,还是我遗漏了一些关于继承和位置的基本信息？

跳跃的方法：

-(void)playerJump {

    // Player jump if on ground
    CGPoint pointBelowPlayer = CGPointMake(_player.position.x,_player.position.y-_player.size.height);
    SKNode *blockNode = [self nodeAtPoint:pointBelowPlayer];

    if (blockNode.physicsBody.categoryBitMask == groundCategory){
        [_player.physicsBody applyImpulse:CGVectorMake(0,120.0f)];
    }
}

移动父节点的方法：

-(void)toggleDrawer {
    if (bDrawerVisiblE) {
        [_actionLayer runAction:[SKAction moveTo:CGPointMake(0,0) duration:1]];
        bDrawerVisible = false;
    } else {
        [_actionLayer runAction:[SKAction moveTo:CGPointMake(0,200) duration:1]];
        bDrawerVisible = true;
    }
}

创建SpriteNodes：

-(id)initWithSize:(CGSizE)size {
    if (self = [super initWithSize:size]) {

        _actionLayer = [SKNode new];

        _player = [self createPlayer];
        [_actionLayer addChild:_player];

        _ground = [self createGround];
        [_actionLayer addChild:_ground];
}

-(SKSpriteNode *)createPlayer {

    SKSpriteNode *player = [SKSpriteNode spriteNodeWithImagenamed:@"redSquare.png"];
    player.name = @"player";
    player.scale = 0.5;
    player.position = CGPointMake(screenWidth/3,player.size.height*2);
    player.physicsBody = [SKPhysicsBody bodyWithRectangLeofSize:player.size];
    player.physicsBody.categoryBitMask = playerCategory;
    player.physicsBody.collisionBitMask = groundCategory;
    player.physicsBody.contactTESTBitMask = noteCategory;

    return player;
}

-(SKSpriteNode *)createGround {

    SKSpriteNode *ground = [SKSpriteNode spriteNodeWithImagenamed:@"ground.png"];
    ground.name = @"ground";
    ground.physicsBody = [SKPhysicsBody bodyWithRectangLeofSize:ground.size];
    ground.physicsBody.dynamic = NO;
    ground.physicsBody.categoryBitMask = groundCategory;
    ground.physicsBody.collisionBitMask = playerCategory;
    ground.xScale = screenWidth/ground.size.width;;
    ground.position = CGPointMake(self.size.width/2,0);

    return ground;
}