How to hit objects with finger movement in Sprite Kit, Objective C

Question

I\'m trying to make a game in which I have some SKSpriteNodes and the User can hit them with finger movement, I\'m using apple\'s new Sprite Kit.

To

Answer 1

You could do something like this.

-(void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event {
    touchOn=YES;
    UITouch *touch = [touches anyObject];
    CGPoint location = [touch locationInNode:self.parent];
    touchPos =location;
    [self.physicsBody setVelocity:CGVectorMake(0, 0)];

}
-(void)touchesMoved:(NSSet *)touches withEvent:(UIEvent *)event {
    touchOn=YES;
    UITouch *touch = [touches anyObject];
    CGPoint location = [touch locationInNode:self.parent];
    touchPos =location;
}
-(void)touchesEnded:(NSSet *)touches withEvent:(UIEvent *)event {
    touchOn=NO;
}
-(void)touchesCancelled:(NSSet *)touches withEvent:(UIEvent *)event {
    touchOn=NO;
}
-(void)update:(NSTimeInterval)dt {
    if (touchOn) {
        CGVector vector = CGVectorMake((touchPos.x-self.position.x)/dt, (touchPos.y-self.position.y)/dt);
        self.physicsBody.velocity=vector;
    }
}

Subclass a node and make a method called update that receives updates from the scene along with the change in time. Also add touches methods and keep track of the current touch position.