UIPanGestureRecognizer没有顺利移动对象

Question

我试图使用UIPanGestureRecognizer移动我的对象,但我似乎无法让它顺利移动.当我向特定方向移动并向相反方向移动时,它不会立即作出反应.我假设值可能有问题,因为它在" - >"方向为正,在"< - "方向为负.

我的代码如下:

- (void)panDetected:(UIPanGestureRecognizer *)panRecognizer
    {    
        CGPoint pointA = [panRecognizer locationInView:self.view];
        CGPoint pointB = [panRecognizer translationInView:self.view];

        if(panRecognizer.state == UIGestureRecognizerStateEnded ||
           panRecognizer.state == UIGestureRecognizerStateChanged) {     
            _camera.x += pointB.x * 0.0001f;
        }
    }

有没有人有更合适的方法来解决这个问题？

提前致谢.

Answer 1

您应该重置UIPanGestureRecognizer的翻译值:

- (void)panDetected:(UIPanGestureRecognizer *)panRecognizer
{    
   CGPoint point = [panRecognizer translationInView:self.view];
   _camera.x += point.x * 0.0001f;
   [panRecognizer setTranslation:CGPointZero inView:self.view];
}