ios – 如何在UIPanGestureRecognizer方法中获取当前触摸点和上一个触摸点？

我是iOS新手,我在我的项目中使用UIPanGestureRecognizer.在我拖动视图时,我需要获取当前触摸点和上一个触摸点.我很难得到这两点.

如果我使用touchesBegan方法而不是使用UIPanGestureRecognizer,我可以通过以下代码得到这两点：

- (void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event{
    CGPoint touchPoint = [[touches anyObject] LOCATIOnInView:self];
    CGPoint prevIoUs=[[touches anyObject]prevIoUsLOCATIOnInView:self];
}

我需要在UIPanGestureRecognizer事件触发方法中获得这两点.我怎样才能做到这一点？请指导我.

CGPoint currentLOCATIOn = [recognizer LOCATIOnInView:self.view];

prevIoUsLOCATIOn = [recognizer LOCATIOnInView:self.view];