问如何像UITableView或ScollView一样处理触摸事件

EN

- (void)handler:(UIPanGestureRecognizer *)recognizer
{
    CGPoint location = [recognizer locationInView:self];
    switch (recognizer.state)
    {
        case UIGestureRecognizerStateBegan:
            self.initialLocation = location;
            self.lastLocation = location;
            break;
        case UIGestureRecognizerStateChanged:
            // Whatever work you need to do.
            // location is the current point.
            // self.lastLocation is the location from the previous call.
            // self.initialLocation is the location when the touch began.

            // NOTE: The last thing to do is set last location for the next time we're called.
            self.lastLocation = location;
            break;
    }
}