0

在我的课堂场景下，我有：

let health = SKSpriteNode(imageNamed: "healthBar")

当狗对敌人造成伤害时，我希望敌人在其上方生成一个健康条，以显示其当前的健康状况。

如果我将enemy.addChild(health) 行更改为self.addChild(health)，下面的代码可以正常工作。但是当它是enemy.addChild(health) 时，生命值条是完全不可见的。我知道健康栏在那里是因为我可以打印enemy.children，它在那里显示但不可见。有什么建议么？

**注意我不能只使用 self.addChild(health) ，因为我需要多个健康条来跟踪多个敌人的位置。这就是为什么我需要每个敌人都有自己的儿童健康栏。

if body1.categoryBitMask == PhysicsCategories.DodgingDogPlayer && body2.categoryBitMask == PhysicsCategories.Enemy{ //if the player has hit an enemy
    if dogAttacking == true{
        dogAttackAnimation.position = CGPoint(x: dodgingDogPlayer.position.x, y: dodgingDogPlayer.position.y + 80)
        dogAttackAnimating()
        let waitToFade = SKAction.wait(forDuration: 0.5)
        let fadeOutSequence = SKAction.sequence([waitToFade, fadeOut])

        dogAttackAnimation.run(fadeOutSequence)
        if body2.node?.name == "Orange Cat" || body2.node?.name == "Brown Cat" || body2.node?.name == "Black Cat"{

            if ( body2.node?.childNode(withName: "health") != nil) {

                print ("already has health")
                if let enemy = contact.bodyB.node as? Enemy{

                    health.xScale = CGFloat(fixedHealthBarLength * CGFloat(enemy.healthStat))
                    health.position = CGPoint(x: enemy.position.x, y: enemy.position.y + 50)
                    health.texture?.filteringMode = SKTextureFilteringMode.nearest

                    enemy.healthStat -= 1
                    if enemy.healthStat <= 0{
                        body2.node?.removeFromParent()
                    }
                }

            } else if ( body2.node?.childNode(withName: "health") == nil) {

                print ("doesnt have health")
                health.yScale = 2
                health.zPosition = 10
                health.name = "health"
                if let enemy = contact.bodyB.node as? Enemy{

                    health.anchorPoint = CGPoint(x: 0.5, y: 0)
                    health.xScale = CGFloat(fixedHealthBarLength * CGFloat(enemy.healthStat))
                    health.position = CGPoint(x: enemy.position.x, y: enemy.position.y + 50)
                    health.alpha = 1
                    health.texture?.filteringMode = SKTextureFilteringMode.nearest
                    enemy.addChild(health)

                    enemy.healthStat -= 1
                    if enemy.healthStat <= 0{
                        body2.node?.removeFromParent()
                    }
                }

            }
        }
    }
4

0 回答 0