如何改变SKSpriteNode与SKAction的位置

Question

while word != ""{ 

    if word[word.startIndex] == "R" { 

     let moveSpriteToRight = SKAction.move(to: CGPoint(x: sprite.position.x+128, y: sprite.position.y), duration: 1) 

     sprite.run(moveSpriteToRight) 

    } else if word == "D" { 

     let moveSpriteToDown = SKAction.move(to: CGPoint(x: sprite.position.x, y: sprite.position.y-128), duration: 1) 

     sprite.run(moveSpriteToDown) 

    } else if word == "L" { 

     let moveSpriteToLeft = SKAction.move(to: CGPoint(x: sprite.position.x-128, y: sprite.position.y), duration: 1) 

     sprite.run(moveSpriteToLeft) 

    } else if word == "U" { 

     let moveSpriteToUp = SKAction.move(to: CGPoint(x: sprite.position.x, y: sprite.position.y+128), duration: 1) 

     sprite.run(moveSpriteToUp) 
    } 

    word.remove(at: word.startIndex) 
} 

这是我的代码的一部分，我不能多次使用SKAction。例如，如果单词=“ULD”，则精灵应该沿着路径向上（U）移动，然后向左（L）和向下（D）移动。每次通过手势创建新的轨迹时，记录手势的终止都会通过touchesEnded发生。雪碧他们必须每次执行。但是在这个例子中，我的模拟器中的精灵将位置改为Down。

Answer 1

你可以把你的动作到一个数组中，并运行它们的顺序完成所有检查完成

let actions = [SKAction]() 

while word != ""{ 

    if word[word.startIndex] == "R" { 
     actions.append(SKAction.move(to: CGPoint(x: sprite.position.x+128, y: sprite.position.y), duration: 1)) 
    } 

    if word == "D" { 
     actions.append(SKAction.move(to: CGPoint(x: sprite.position.x, y: sprite.position.y-128), duration: 1)) 
    } 

    if word == "L" { 
     actions.append(SKAction.move(to: CGPoint(x: sprite.position.x-128, y: sprite.position.y), duration: 1)) 
    } 

    if word == "U" { 
     actions.append(SKAction.move(to: CGPoint(x: sprite.position.x, y: sprite.position.y+128), duration: 1)) 
    } 

    word.remove(at: word.startIndex) 
} 

let sequenceOfActions = SKAction.sequence([actions]) 
sprite.run(sequenceOfActions)