Question

我要做的是运行一个包含的动作（playForwardAnimation）多个操作（在不同节点上运行）并在完成所有操作后，运行名为playBackwardAnimation的操作。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。看起来两个动画同时被调用。怎么做到这一点？动画中使用的节点层次结构如下所示：

持有人（upperArea）

upperArea（node4，node3，node2）

节点4（节点5）

Answer 1

不幸的是，当你在这样的不同节点上运行动作并且需要严格的序列时，它会变得混乱。这是实现目标的一种方法。我确定有很多。

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]];

在不同节点上一个接一个地运行操作

1 个答案: