UISwipeGestureRecognizers won't be recognized simultaneously - ios

Question

In my spritekit game, I am attempting to make it so that 2 UISwipeGestureRecognizers can be recognized simultaneously, however, I am unable to do so. Any help would be much appreciated, thanks in advance. Below is my code...
In ViewDidLoad:
UISwipeGestureRecognizer *leftSwipe1 = [[UISwipeGestureRecognizer alloc] initWithTarget:self action:#selector(leftSwiped1:)];
[leftSwipe1 setDirection:UISwipeGestureRecognizerDirectionLeft];
[leftSwipe1 setNumberOfTouchesRequired:1];
[self.view addGestureRecognizer:leftSwipe1];
UISwipeGestureRecognizer *rightSwipe1 = [[UISwipeGestureRecognizer alloc] initWithTarget:self action:#selector(rightSwiped1:)];
[rightSwipe1 setDirection:UISwipeGestureRecognizerDirectionRight];
[rightSwipe1 setNumberOfTouchesRequired:1];
[self.view addGestureRecognizer:rightSwipe1];
After ViewDidLoad:
-(void)rightSwiped1:(UIGestureRecognizer *)gestureRecognizer {
CGPoint pt = [gestureRecognizer locationInView:self.view];
if(pt.x < (self.view.bounds.size.width/2))
{
SKNode *person1 = [self childNodeWithName:#"person1"];
SKAction *moveRight = [SKAction moveTo:CGPointMake(CGRectGetMidX(self.frame) - 90, CGRectGetMidY(self.frame) + 200) duration:0.1f];
[person1 runAction:moveRight];
} else if (pt.x > (self.view.bounds.size.width/2)) {
SKNode *person2 = [self childNodeWithName:#"person2"];
SKAction *moveRight2 = [SKAction moveTo:CGPointMake(CGRectGetMidX(self.frame) + 400, CGRectGetMidY(self.frame) + 200) duration:0.1f];
[person2 runAction:moveRight2];
}
}
-(void)leftSwiped1:(UIGestureRecognizer *)gestureRecognizer {
CGPoint pt = [gestureRecognizer locationInView:self.view];
if(pt.x < (self.view.bounds.size.width/2))
{
SKNode *person1 = [self childNodeWithName:#"person1"];
SKAction *moveLeft = [SKAction moveTo:CGPointMake(CGRectGetMidX(self.frame) - 400, CGRectGetMidY(self.frame) + 200) duration:0.1f];
[person1 runAction:moveLeft];
} else if (pt.x > (self.view.bounds.size.width/2)) {
SKNode *person2 = [self childNodeWithName:#"person2"];
SKAction *moveLeft2 = [SKAction moveTo:CGPointMake(CGRectGetMidX(self.frame) + 90, CGRectGetMidY(self.frame) + 200) duration:0.1f];
[person2 runAction:moveLeft2];
}
}
-(BOOL)gestureRecognizerShouldBegin:(UIGestureRecognizer *)gestureRecognizer{
return YES;
}
-(BOOL)gestureRecognizer:(UIGestureRecognizer *)gestureRecognizer shouldRecognizeSimultaneouslyWithGestureRecognizer:(UIGestureRecognizer *)otherGestureRecognizer{
return YES;
}
-(BOOL)gestureRecognizer:(UIGestureRecognizer *)gestureRecognizer shouldReceiveTouch:(UITouch *)touch{
return YES;
}

Answer 1

You never assign the delegate property of your UISwipeGestureRecognizers, therefore your delegate methods never get called.
You can fix this by simply doing:
UISwipeGestureRecognizer *leftSwipe1 = [[UISwipeGestureRecognizer alloc] initWithTarget:self action:#selector(leftSwiped1:)];
leftSwipe1.delegate = self;
[leftSwipe1 setDirection:UISwipeGestureRecognizerDirectionLeft];
[leftSwipe1 setNumberOfTouchesRequired:1];
[self.view addGestureRecognizer:leftSwipe1];
UISwipeGestureRecognizer *rightSwipe1 = [[UISwipeGestureRecognizer alloc] initWithTarget:self action:#selector(rightSwiped1:)];
rightSwipe1.delegate = self;
[rightSwipe1 setDirection:UISwipeGestureRecognizerDirectionRight];
[rightSwipe1 setNumberOfTouchesRequired:1];
[self.view addGestureRecognizer:rightSwipe1];
Make sure you're also conforming to the UIGestureRecognizerDelegate protocol:
#interface YourViewController <UIGestureRecognizerDelegate>
...
#end