Sprite Kit编程指南(20)

ios原生游戏开发

static inline CGFloat skRand(CGFloat low, CGFloat high) {

return skRandf()*(high - low) + low;

}

- (void)addRock {

SKSpriteNode *rock = [[SKSpriteNode alloc] initWithColor [SKColor brownColor] size:CG rock.position = CGPointMake(skRand(0, self.size.width),self.size.height-50);

= @“rock”;

rock.physicsBody = [SKPhysicsBody bodyWithRectangleOfSize:rock.size];

esPreciseCollisionDetection = YES;

[self addChild:rock];

}

。

。 。

， Sprite Kit

5. didSimulatePhysics

- (void)didSimulatePhysics