雪碧套件在切换到新场景之前不能运行动作

Question

此代码中不运行操作：

 SKAction *moveLeft = [SKAction moveToX:(-800) duration:0.6];
 SKAction *moveRight = [SKAction moveToX:(800) duration:0.6];
 [_labelLogo runAction:moveLeft];
 [_labelPlay runAction:moveRight];  

 NewYork *start = [[NewYork alloc] initWithSize:self.size];
 SKTransition *reveal = [SKTransition fadeWithColor:[UIColor clearColor] duration:2];
 reveal.pausesIncomingScene = NO;

 [self.scene.view presentScene: start transition: reveal];

如果我评论NewYork切换，它们可以工作。

Answer 1

动作问题*moveLeft / *moveRight，是因为立即开始向NewYork场景的转换，所以您应该等待*moveLeft / *moveRight完成如下操作：

 SKAction *moveLeft = [SKAction moveToX:(-800) duration:0.6];
 SKAction *moveRight = [SKAction moveToX:(800) duration:0.6];
 [_labelLogo runAction:moveLeft];

 [_labelPlay runAction:moveRight completion:^{

    NewYork *start = [[NewYork alloc] initWithSize:self.size];
    SKTransition *reveal = [SKTransition fadeWithColor:[UIColor clearColor] duration:2];
    reveal.pausesIncomingScene = NO;

    [self.view presentScene:start transition:reveal];
 }];