在不同的节点上一个接一个地运行动作

Question

我想做的是运行一个动作（playForwardAnimation），它包括多个动作（在不同节点上运行），在所有动作完成后，运行一个名为 playBackwardAnimation 的动作。这是代码：`

SKAction *wait = [SKAction waitForDuration:3.5];
SKAction *forwardAnimationAction = [SKAction animateWithTextures:forwardAnimationFrames timePerFrame:0.1];
SKAction *backwardAnimationAction = [SKAction animateWithTextures:backwardAnimationFrames timePerFrame:0.1];
SKAction *forwardAnimation = [SKAction sequence:@[wait , forwardAnimationAction, wait, forwardAnimationAction]];
SKAction *backwardAnimation = [SKAction sequence:@[wait , backwardAnimationAction, wait, forwardAnimationAction]];


SKAction *playForwardAnimation = [SKAction runBlock:^{
    [node5 runAction:forwardAnimation completion:^{
        [node4 runAction:[SKAction rotateByAngle:-0.1 duration:0.3]];
        [node3 runAction: [SKAction rotateByAngle:-0.2 duration:0.3]];
        [node2 runAction: [SKAction rotateByAngle:-0.3 duration:0.3]];
        NSLog(@"forward action executed");
    }];
}];

SKAction *playBackwardAnimation = [SKAction runBlock:^{
    [node5 runAction:backwardAnimation completion:^{
        [node4 runAction:[SKAction rotateByAngle:0.1 duration:0.3]];
        [node3 runAction: [SKAction rotateByAngle:0.2 duration:0.3]];
        [node2 runAction: [SKAction rotateByAngle:0.3 duration:0.3]];
        NSLog(@"backward action executed");
    }];
}];


SKAction *sequence = [SKAction sequence:@[playForwardAnimation,playBackwardAnimation]];

SKAction *action = [SKAction repeatActionForever:sequence];

[holder runAction:action];`

问题是playForwardAnimation完全结束后没有调用playBackwardAnimation。看起来两个动画都被同时调用了。如何做到这一点？动画中使用的节点层次结构如下所示：

holder (upperArea)

upperArea (node4,node3,node2)

节点 4（节点 5）

Answer 1

不幸的是，当您像这样在不同的节点上执行运行操作并且您需要严格的顺序时，它会变得混乱。这是一种方法。我敢肯定有很多。

希望我做对了

SKAction *wait = [SKAction waitForDuration:3.5];
SKAction *forwardAnimationAction = [SKAction animateWithTextures:forwardAnimationFrames timePerFrame:0.1];
SKAction *backwardAnimationAction = [SKAction animateWithTextures:backwardAnimationFrames timePerFrame:0.1];
SKAction *forwardAnimation = [SKAction sequence:@[wait , forwardAnimationAction, wait, forwardAnimationAction]];
SKAction *backwardAnimation = [SKAction sequence:@[wait , backwardAnimationAction, wait, forwardAnimationAction]];


CGFloat rotateDur = 0.3;
SKAction *rotateWait = [SKAction waitForDuration:rotateDur];

SKAction *forwardAnimationBlock = [SKAction runBlock:^{
    [node4 runAction:[SKAction rotateByAngle:-0.1 duration:rotateDur]];
    [node3 runAction: [SKAction rotateByAngle:-0.2 duration:rotateDur]];
    [node2 runAction: [SKAction rotateByAngle:-0.3 duration:rotateDur]];
}];

SKAction *backwardAnimationBlock = [SKAction runBlock:^{
    [node4 runAction:[SKAction rotateByAngle:-0.1 duration:rotateDur]];
    [node3 runAction: [SKAction rotateByAngle:-0.2 duration:rotateDur]];
    [node2 runAction: [SKAction rotateByAngle:-0.3 duration:rotateDur]];
}];

SKAction *sequence = [SKAction sequence:@[forwardAnimation, forwardAnimationBlock, rotateWait, backwardAnimation, backwardAnimationBlock, rotateWait]];

在不同的节点上一个接一个地运行动作

Running actions one after another on different nodes

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