防止SKSpriteNode从其他SKSpriteNode退回

Question

我有一个SKSpriteNode，它会与另一个SKSpriteNode发生碰撞和反弹。我想要的是能够检测碰撞，而不是让它反弹。我希望它从其他节点上反弹，但不是这个节点。这有可能吗？

self.physicsWorld.contactDelegate = self;
self.physicsBody = [SKPhysicsBody bodyWithEdgeLoopFromRect:self.frame]; 
self.physicsWorld.gravity = CGVectorMake(0.0f, 0.0f);


self.zone = [SKSpriteNode spriteNodeWithImageNamed:@"Oval.png"];
self.zone.position = CGPointMake(CGRectGetMidX(self.frame),CGRectGetMidY(self.frame));  self.zone.xScale = 0.3;
self.zone.yScale = 0.3;

self.zone.physicsBody = [SKPhysicsBody bodyWithCircleOfRadius:self.zone.frame.size.width/2];
self.zone.physicsBody.restitution = 0.0f;
self.zone.physicsBody.density = 0;
self.zone.physicsBody.friction = 0.4f;
self.zone.physicsBody.categoryBitMask = zoneCategory;
self.zone.physicsBody.dynamic = NO;


self.ball = [SKSpriteNode spriteNodeWithImageNamed:@"Ball.png"];
self.ball.position = CGPointMake(80,0);
self.ball.name = @"BallNode";//how the node is identified later
self.ball.physicsBody = [SKPhysicsBody bodyWithCircleOfRadius:self.ball.frame.size.width/2];
self.ball.physicsBody.restitution = 0.1f;
self.ball.physicsBody.friction = 0.4f;
self.ball.physicsBody.categoryBitMask = ballCategory;
self.ball.physicsBody.dynamic = NO;

我不想让球和区域反弹。有什么想法吗？

Answer 1

设置这两个主体的collisionBitMask和contactTestBitMask，如下所示：

self.zone.collisionBitMask = 0xFFFFFFFF & (~ballCategory);
self.ball.collisionBitMask = 0xFFFFFFFF & (~zoneCategory);
self.zone.contactTestBitMask = ballCategory;

然后，当发生联系时，期望在您的SKPhysicsContactDelegate中调用didBeginContact:。将不会有任何拼贴。