Sprite Kit shooting projectiles at target - sprite-kit

Question

I wanted to make my turret Sprite shoot at the monster. i have already got the turret to turn to the monster and follow it until its out of range, now i just need to make the shooting occur.
what is the best way to shoot a projectile from the turret to the monster?
i have already done this part:
-(void)shoot
{
SKSpriteNode *bullet = [SKSpriteNode spriteNodeWithImageNamed:#"CannonMissile-hd.png"]; ... i don't know what to do next
}
also, i need it to shoot at intervals of x seconds,
thanks

Answer 1

-(void)shoot
{
SKSpriteNode *turretNode;//I assume you have this node already in the scene . Dont use this line
SKSpriteNode *enemy;//I assume you have this node already in the scene . Dont use this line
SKSpriteNode *bullet = [SKSpriteNode spriteNodeWithImageNamed:#"CannonMissile-hd.png"];
bullet.zPosition = turretNode.zPosition -1;//if you want your bullet not to spawn on top of your turret
[turretNode addChild:bullet];
//you need to set the physics body of the bullet so you can detect contacts
SKAction *move = [SKAction moveTo:enemy.position duration:0.5];//if u have multiple enemies then you have to deceide which one to hit
[bullet runAction:move completion:^{
[bullet removeFromParent];//removes the bullet when it reaches target
//you can add more code here or in the didBeginContact method
}];
//repeat the process
[self performSelector:#selector(shoot) withObject:nil afterDelay:5];//replace 5 with ur x seconds
//that's it
}