xcode 一次运行两个 SKActions
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Run two SKActions at once
提问by maxhud
I'm using a sequence to run a list of SKActions. What I want to do however, is run an SKAction, then run two at once, then run one in sequence.
我正在使用一个序列来运行 SKAction 列表。然而，我想要做的是运行一个 SKAction，然后一次运行两个，然后依次运行一个。
Here is my code:
这是我的代码：
SKNode *ballNode = [self childNodeWithName:@"ball"];
if (ballNode != Nil){
ballNode.name = nil;
SKAction *delay = [SKAction waitForDuration:3];
SKAction *scale = [SKAction scaleTo:0 duration:1];
SKAction *fadeOut = [SKAction fadeOutWithDuration:1];
SKAction *remove = [SKAction removeFromParent];
//put actions in sequence
SKAction *moveSequence = [SKAction sequence:@[delay, (run scale and fadeout at the same time), remove]];
//run action from node (child of SKLabelNode)
[ballNode runAction:moveSequence];
}
How can I accomplish this? I'm assuming I can't use a sequence?
我怎样才能做到这一点？我假设我不能使用序列？
回答by DogCoffee
Use a group action.
使用集体行动。
From sprite kit programming guide:
来自精灵套件编程指南：
A group action is a collection of actions that all start executing as soon as the group is executed. You use groups when you want actions to be synchronized
组动作是一组动作的集合，一旦组被执行，所有动作都开始执行。当您希望操作同步时使用组
SKSpriteNode *wheel = (SKSpriteNode*)[self childNodeWithName:@"wheel"];
CGFloat circumference = wheel.size.height * M_PI;
SKAction *oneRevolution = [SKAction rotateByAngle:-M_PI*2 duration:2.0];
SKAction *moveRight = [SKAction moveByX:circumference y:0 duration:2.0];
SKAction *group = [SKAction group:@[oneRevolution, moveRight]];
[wheel runAction:group];
回答by Dave Levy
A example in Swift would be:
Swift 中的一个例子是：
let textLabel = SKLabelNode(text: "Some Text")
let moveTo = CGPointMake(600, 20)
let big = SKAction.scaleTo(3.0, duration: 0.1)
let med = SKAction.scaleTo(1.0, duration: 0.3)
let reduce = SKAction.scaleTo(0.2, duration: 1.0)
let move = SKAction.moveTo(moveTo, duration: 1.0)
let fade = SKAction.fadeOutWithDuration(2.0)
let removeNode = SKAction.removeFromParent()
let group = SKAction.group([fade, reduce])
let sequence = SKAction.sequence([big, med, move, group, removeNode])
self.addChild(textLabel)
textLabel.runAction(sequence)
