ios - 同时独立的手势

Question

我正在制作一款游戏，玩家一次可以移动两个人物。每个人都有自己的一半屏幕，并在其中移动。不幸的是，我发现当我同时用两个拇指滑动时，什么也没有发生。甚至我的识别器都没有被触发。

也许有一种方法。我在 GameViewController 的顶部制作了另外两个 View 并添加了单独的手势。但是我不能在我的 gamescene.m 中引用它们来创建 Action 。

有没有办法识别在 GameViewController 和 GameScene 中声明的滑动并向它们添加任何 Action ？

我已经尝试根据触摸的开始和结束制作我自己的识别器，但是当同时释放两个手指时它变得困惑并且通常忘记 react 两次，我的意思是每次释放分别。

-(void)setUpGestActions{
    _swipeGestureLeft = [[UISwipeGestureRecognizer alloc]initWithTarget:self action:@selector(swipeLeft:)];
    [self.swipeGestureLeft setDirection:UISwipeGestureRecognizerDirectionLeft];
    self.swipeGestureLeft.cancelsTouchesInView = NO;
    self.swipeGestureLeft.delegate = self;
    [self.view addGestureRecognizer: self.swipeGestureLeft];

    _swipeGestureRight = [[UISwipeGestureRecognizer alloc]initWithTarget:self action:@selector(swipeRight:)];
    [self.swipeGestureRight setDirection:UISwipeGestureRecognizerDirectionRight];
    self.swipeGestureRight.cancelsTouchesInView = NO;
    self.swipeGestureRight.delegate = self;
    [self.view addGestureRecognizer: self.swipeGestureRight];

    _swipeGestureUp = [[UISwipeGestureRecognizer alloc]initWithTarget:self action:@selector(swipeUp:)];
    [self.swipeGestureUp setDirection:UISwipeGestureRecognizerDirectionUp];
    self.swipeGestureUp.cancelsTouchesInView = NO;
    self.swipeGestureUp.delegate = self;
    [self.view addGestureRecognizer: self.swipeGestureUp];

    _swipeGestureDown = [[UISwipeGestureRecognizer alloc]initWithTarget:self action:@selector(swipeDown:)];
    [self.swipeGestureDown setDirection:UISwipeGestureRecognizerDirectionDown];
    self.swipeGestureDown.cancelsTouchesInView = NO;
    self.swipeGestureDown.delegate = self;
    [self.view addGestureRecognizer: self.swipeGestureDown];

    _moveLeft = [SKAction moveByX:-self.frame.size.width/6 y:0 duration:self.velocity];
    _moveRight = [SKAction moveByX:self.frame.size.width/6 y:0 duration:self.velocity];
    _moveUp = [SKAction moveByX:0 y:self.frame.size.width/6  duration:self.velocity];
    _moveDown = [SKAction moveByX:0 y:-self.frame.size.width/6 duration:self.velocity];

    _downMovement = [SKAction moveByX:0 y:-1 duration:self.downMovementVelocity];
}

-(void)swipeLeft:(UISwipeGestureRecognizer*) recognizer{
    _sideDisting = [recognizer locationInView:self.view];
    if(self.sideDisting.x <= self.frame.size.width/2){
        [_boy runAction:self.moveLeft];
    }
    else{
        [_girl runAction:self.moveLeft];

    }
}

-(void)swipeRight:(UISwipeGestureRecognizer*) recognizer{
    _sideDisting = [recognizer locationInView:self.view];
    if(self.sideDisting.x <= self.frame.size.width/2){
        [_boy runAction:self.moveRight];
    }
    else{
        [_girl runAction:self.moveRight];
    }
}

-(void)swipeUp:(UISwipeGestureRecognizer*) recognizer{
    _sideDisting = [recognizer locationInView:self.view];
    if(self.sideDisting.x <= self.frame.size.width/2){
        [_boy runAction:self.moveUp];
    }
    else{
        [_girl runAction:self.moveUp];
    }
}

-(void)swipeDown:(UISwipeGestureRecognizer*) recognizer{
    _sideDisting = [recognizer locationInView:self.view];
    if(self.sideDisting.x <= self.frame.size.width/2){
        [_boy runAction:self.moveDown];
    }
    else{
        [_girl runAction:self.moveDown];

    }
}

Answer 1

要同时识别多个手势，请在每个手势识别器上设置一个委托(delegate)。每个手势的代表可以是同一个对象。

在委托(delegate)中，实现这个:

- (BOOL)gestureRecognizer:(UIGestureRecognizer *)gestureRecognizer
     shouldRecognizeSimultaneouslyWithGestureRecognizer:(UIGestureRecognizer *)otherGestureRecognizer {
    return YES;
}