检测UiScrollView上的触摸位置

Question

我需要从UIScrollView获取触摸位置.但是当我为scrollview创建一个子类时:

- (void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event{
  NSArray *touchesArray = [touches allObjects];
  UITouch *touch = (UITouch *)[touchesArray objectAtIndex:0];
  CGPoint point = [touch locationInView:self];
  self.position = point;}

该函数touchesBegan并不总是被调用.如果我快速滑动,touchesBegan从不调用,而是scrollViewDidScroll直接调用.

我无法使用,UIGesture (UITapGestureRecognizer, ... )因为用户不点按或滑动.

还有其他方法可以从UIScrollView获取位置吗？

编辑:

谢谢你:https://stackoverflow.com/a/15763450/1752843

UIScrollView子类:

- (UIView *)hitTest:(CGPoint)point withEvent:(UIEvent *)event{
    self.position = point;
    return self;
}

Answer 1

要检测scrollview中的触摸位置,请尝试此代码

UITapGestureRecognizer *singleTap = [[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(singleTapGestureCaptured:)];
[scrollView addGestureRecognizer:singleTap]; 

- (void)singleTapGestureCaptured:(UITapGestureRecognizer *)gesture
 { 
   CGPoint touchPoint=[gesture locationInView:scrollView];
 }