Spritekit：用设定的X和Y值分隔随机放置的非动态“块”节点吗？

Question

my script below does exactly what i need it to do, add blocks to a scene in any random order in the view. the only problem is, as i increase the amount of "block" nodes, they tend to overlap on one another and clump up, I'm wondering if there is a way i can add a "barrier" around each block node so that they cannot overlap but still give a random feel? My current code is below:

-(void) addBlocks:(int) count {
for (int i = 0; i< count; i++) {

SKSpriteNode *blocks = [SKSpriteNode spriteNodeWithImageNamed:@"Ball"];
blocks.physicsBody = [SKPhysicsBody bodyWithCircleOfRadius:(blocks.size.width/2)];
blocks.physicsBody.dynamic = NO;
blocks.position = CGPointMake(self.frame.size.width/2, self.frame.size.height/2);
[self addChild:blocks];


int blockRandomPositionX = arc4random() % 290;
int blockRandomPositionY = arc4random() % 532;
blockRandomPositionY = blockRandomPositionY + 15;
blockRandomPositionX = blockRandomPositionX + 15;
blocks.position = CGPointMake(blockRandomPositionX, blockRandomPositionY);



}

}

Any help highly appreciated, thanks!

Answer 1

To prevent two nodes from overlapping, you should check the newly created node's random position with intersectsNode: to see if it overlaps any other nodes. You also have to add each successfully added node into an array against which you run the intersectsNode: check.

Look at the SKNode Class Reference for detailed information.