Particle effects in Sprite Kit

burst.m

NSString *burstPath = [[NSBundle mainBundle] pathForResource:@"Snow" ofType:@"sks"];
        
SKEmitterNode *burstEmitter = [NSKeyedUnarchiver unarchiveObjectWithFile:burstPath];
        
burstEmitter.position = CGPointMake(CGRectGetMidX(self.frame),
                                    CGRectGetMidY(self.frame));

[self addChild:burstEmitter];