swift - 当代码另有说明时，是否基于碰撞移除 Sprite 对象？
问题描述
let playerBulletCategory: UInt32 = 0x1 << 2
let meteorCategory: UInt32 = 0x1 << 4
玩家子弹法
func fireBullet(){
let bullet = SKSpriteNode(imageNamed: "playerBullet")
bullet.name = "playerBullet"
bullet.size = CGSize(width: 80, height: 80)
bullet.position = player.position
bullet.zPosition = 6
player.physicsBody?.velocity.dx = 0
player.physicsBody?.velocity.dy = 0
bullet.physicsBody = SKPhysicsBody(rectangleOf: bullet.size)
bullet.physicsBody!.affectedByGravity = false
bullet.physicsBody?.isDynamic = false
bullet.physicsBody!.categoryBitMask = playerBulletCategory
bullet.physicsBody!.collisionBitMask = meteorCategory
bullet.physicsBody!.contactTestBitMask = meteorCategory
self.addChild(bullet)
let moveBullet = SKAction.moveTo(x: self.size.width + bullet.size.width, duration: 1)
let deleteBullet = SKAction.removeFromParent()
let bulletSequence = SKAction.sequence([moveBullet,deleteBullet])
bullet.run(bulletSequence)
}
流星法
let Meteor = SKSpriteNode(imageNamed: "Meteor")
Meteor.setScale(1)
Meteor.position = startPoint
Meteor.zPosition = 5
Meteor.name = "Meteor"
Meteor.physicsBody = SKPhysicsBody(circleOfRadius: Meteor.size.width / 2)
Meteor.physicsBody!.affectedByGravity = false
Meteor.physicsBody!.isDynamic = true
Meteor.physicsBody!.categoryBitMask = meteorCategory
Meteor.physicsBody!.collisionBitMask = 0
Meteor.physicsBody!.contactTestBitMask = playerBulletCategory
self.addChild(Meteor)
检测到接触时已开始的方法
func didBegin(_ contact: SKPhysicsContact) {
let Collision:UInt32 = contact.bodyA.categoryBitMask | contact.bodyB.categoryBitMask
if Collision == meteorCategory | playerBulletCategory {
playerBulletCollide(bullet: contact.bodyB.node!)
if(contact.bodyA.node != nil){
spawnExplosion(spawnPosition: contact.bodyA.node!.position)
print("contact is done")
}
meteorHealthFunction()
if(meteorHealth == 0){
meteorCollide(Meteor: contact.bodyA.node!)
print("contact is works")
}
}
当子弹与流星接触时，应将流星移除，但仅当子弹与流星接触 3 次，但在 1 次接触后流星被移除，即使移除联系代码后，流星仍会被移除。
先感谢您。