SK Particle Emitter

gistfile1.m

- (void)emitParticle:(SKScene *)whichScene {
    NSString *emitterPath = [[NSBundle mainBundle] pathForResource:@"YourParticleFileName" ofType:@"sks"];
    SKEmitterNode *particle = [NSKeyedUnarchiver unarchiveObjectWithFile:emitterPath];
    particle.position = self.position;
    particle.name = @"particleName";
    particle.targetNode = self.scene;
    [yourScene addChild:particle];
}