同一个 SKPhysicsBody 多次调用 didBeginContact [英] didBeginContact is being called multiple times for the same SKPhysicsBody

问题描述

 func didBeginContact(contact: SKPhysicsContact) {
    if ( contact.bodyA.categoryBitMask & BodyType.shield.rawValue ) == BodyType.shield.rawValue  {
        contact.bodyB.node?.removeFromParent()
        counter++
        println(counter)


    } else if ( contact.bodyB.categoryBitMask & BodyType.shield.rawValue ) == BodyType.shield.rawValue {
        contact.bodyA.node?.removeFromParent()
        counter++
        println(counter)
    }
}

一个物理体来自纹理 shield.physicsBody = SKPhysicsBody(texture: shieldTexture, size: shieldTexture.size())

另一个来自一个圆 sand.physicsBody = SKPhysicsBody(circleOfRadius: sand.size.width/2)

当两个物体有时相互接触时 sand.physicsBody = SKPhysicsBody(circleOfRadius: sand.size.width/2) 被多次调用.我如何让它只为每个对象调用一次，即使我一接触它就从父对象中删除它.

When the tow objects contact each other sometimes sand.physicsBody = SKPhysicsBody(circleOfRadius: sand.size.width/2) gets called multiple times. How do i get it to only get called once for each object even though i remove it from the parent as soon as it contacts.

推荐答案

当使用基于纹理的物理实体时，问题似乎更频繁地出现.如果在先前的碰撞触发器中指示相同的contact.bodyA.node"，我解决它的方法是禁止didBegin(_contact:SKPhysicsContact)"继续.即:

The problem seems to occur more often when texture-based physics bodies are used. The way I got around it was to inhibit 'didBegin(_ contact: SKPhysicsContact)' from continuing if the same 'contact.bodyA.node' was indicated in the previous collision trigger. i.e.:

if lastNodeA != contact.bodyA.node {
    lastNodeA = contact.bodyA.node
    ...

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