通過拖動屏幕在Y軸上移動精靈

Question

如何在Sprite Kit中使Sprite在y軸上上下移動（iPhone處於橫向）。 子畫面必須保持在設定的X值上。 當用戶拖動它時完成。

Answer 1

您需要實現touchesMoved

從接收器的先前位置減去當前位置，您將獲得移動精靈的數量。

Objective-C的

- (void)touchesMoved:(NSSet *)touches withEvent:(UIEvent *)event {
  UITouch *touch = [touches anyObject];
  CGPoint scenePosition = [touch locationInNode:self];
  CGPoint lastPosition = [touch previousLocationInNode:self];

  CGPoint translation = CGPointMake(0.0, scenePosition.y - lastPosition.y);
  yourSprite.position = CGPointMake(yourSprite.position.x, yourSprite.position.y + translation.y); 
}

斯威夫特2.2

override func touchesMoved(touches: Set<UITouch>, withEvent event: UIEvent?) {
  for touch in touches {
    let scenePosition = touch.locationInNode(self)
    let lastPosition = touch.previousLocationInNode(self)

    let translation = CGPoint(x: 0.0, y: scenePosition.y - lastPosition.y)
    yourSprite.position = CGPointMake(yourSprite.position.x, yourSprite.position.y + translation.y);
  }
}

祝好運！！

Answer 2

絕對定位的非常簡單的解決方案：

-(void)touchesMoved:(NSSet *)touches withEvent:(UIEvent *)event
{
    CGPoint touchLocation;
    for (UITouch *touch in touches) {
        touchLocation = [touch locationInNode:self];
    }
    CGPoint spriteLocation = yourSprite.position; 
    spriteLocation.y = touchLocation.y;
    yourSprite.position = spriteLocation;
}

Answer 3

您可以使用SKAction類的此方法：-

-（void）touchesMoved：（NSSet *）觸摸withEvent：（UIEvent *）事件
{

   [mySprite runAction:[SKAction moveToY:400 duration:0.2];

}

該SKAction方法創建一個垂直移動節點的動作。