$cache[$key] = empty($arr) ? NULL : $arr; return $cache[$key]; } // 门户 获取需要在频道显示的栏目主题数据 function portal_channel_thread($fid) { global $forumlist; if (empty($fid)) return NULL; $orderby = array('tid' => 1); $page = 1; // 遍历所有在频道显示内容的栏目 $category_forumlist = channel_category($fid); $arrlist = array(); $forum_tids = array(); $tidlist = array(); if ($category_forumlist) { foreach ($category_forumlist as &$_forum) { // 频道显示数据 $arrlist['list'][$_forum['fid']] = array( 'fid' => $_forum['fid'], 'name' => $_forum['name'], 'rank' => $_forum['rank'], 'type' => $_forum['type'], 'url' => $_forum['url'], 'channel_new' => $_forum['channel_new'], ); $forum_thread = thread_tid__find(array('fid' => $_forum['fid']), $orderby, $page, $_forum['channel_new'], 'tid', array('tid')); // 最新信息按栏目分组 foreach ($forum_thread as $key => $_thread) { $forum_tids[$key] = $_thread; } unset($forum_thread); } $tidlist += $forum_tids; } unset($category_forumlist); // 获取属性对应的tid集合 list($flaglist, $flagtids) = flag_thread_by_fid($fid); empty($flagtids) || $tidlist += $flagtids; unset($flagtids); // 频道置顶 $stickylist = sticky_list_thread($fid); empty($stickylist) || $tidlist += $stickylist; // 在这之前合并所有二维数组 tid值为键/array('tid值' => tid值) $tidarr = arrlist_values($tidlist, 'tid'); // 在这之前使用$tidarr = array_merge($tidarr, $arr)前合并所有一维数组 tid/array(1,2,3) if (empty($tidarr)) { $arrlist['list'] = isset($arrlist['list']) ? array_multisort_key($arrlist['list'], 'rank', FALSE, 'fid') : array(); return $arrlist; } $tidarr = array_unique($tidarr); $pagesize = count($tidarr); // 遍历获取的所有tid主题 $threadlist = well_thread_find_asc($tidarr, $pagesize); // 遍历时为升序,翻转为降序 $threadlist = array_reverse($threadlist); foreach ($threadlist as &$_thread) { // 各栏目最新内容 isset($forum_tids[$_thread['tid']]) AND $arrlist['list'][$_thread['fid']]['news'][$_thread['tid']] = $_thread; // 全站置顶内容 isset($stickylist[$_thread['tid']]) AND $arrlist['sticky'][$_thread['tid']] = $_thread; // 首页属性主题 if (!empty($flaglist)) { foreach ($flaglist as $key => $val) { if (isset($val['tids']) && in_array($_thread['tid'], $val['tids'])) { $arrlist['flaglist'][$key][array_search($_thread['tid'], $val['tids'])] = $_thread; ksort($arrlist['flaglist'][$key]); $arrlist['flag'][$_thread['tid']] = $_thread; } } } } unset($threadlist); if (isset($arrlist['sticky'])) { $i = 0; foreach ($arrlist['sticky'] as &$val) { ++$i; $val['i'] = $i; } } if (isset($arrlist['flag'])) { $i = 0; foreach ($arrlist['flag'] as &$val) { ++$i; $val['i'] = $i; } } if (isset($arrlist['flaglist'])) { foreach ($arrlist['flaglist'] as &$val) { $i = 0; foreach ($val as &$v) { ++$i; $v['i'] = $i; } } } isset($arrlist['list']) AND $arrlist['list'] = array_multisort_key($arrlist['list'], 'rank', FALSE, 'fid'); return $arrlist; } ?>javascript - Detect touch scroll up or down - Stack Overflow
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javascript - Detect touch scroll up or down - Stack Overflow

programmeradmin0浏览0评论

I need code same this for touch devices . help me please

$(window).on('DOMMouseScroll mousewheel', function (e) {
    if (ScrollEnable) {
        if (e.originalEvent.detail > 0 || e.originalEvent.wheelDelta < 0) {
            console.log('Down');
        } else {
            console.log('Up');
        }
    }
    return false;
});

and here is my touch code, But consul just take up i need find down for my website ! what can i do :|

$('body').on({
    'touchmove': function(e) {
        if (e.originalEvent.touches > 0 || e.originalEvent.touches > 0) {
            console.log('Down');
        } else {
            console.log('Up');
        }
    }
});

I need code same this for touch devices . help me please

$(window).on('DOMMouseScroll mousewheel', function (e) {
    if (ScrollEnable) {
        if (e.originalEvent.detail > 0 || e.originalEvent.wheelDelta < 0) {
            console.log('Down');
        } else {
            console.log('Up');
        }
    }
    return false;
});

and here is my touch code, But consul just take up i need find down for my website ! what can i do :|

$('body').on({
    'touchmove': function(e) {
        if (e.originalEvent.touches > 0 || e.originalEvent.touches > 0) {
            console.log('Down');
        } else {
            console.log('Up');
        }
    }
});
Share Improve this question edited Apr 13, 2016 at 11:30 Omar 31.7k9 gold badges72 silver badges116 bronze badges asked Apr 13, 2016 at 11:10 Morteza NegahiMorteza Negahi 3,4938 gold badges26 silver badges42 bronze badges 3
  • 1 hammerjs.github.io – llamerr Commented Apr 13, 2016 at 11:11
  • 1 You need to detect touch events...not mouse events.. – Rayon Commented Apr 13, 2016 at 11:12
  • jQuery-Mobile is a FRAMKEWORK it is NOT "how to use jQuery for mobile.". Please read tag info before adding it. – Omar Commented Apr 13, 2016 at 11:32
Add a comment  | 

5 Answers 5

Reset to default 5
var updated=0,st;
$('body').on({
    'touchmove': function(e) { 
    st = $(this).scrollTop();
    if(st > updated) {
        console.log('down');
    }
    else {
        console.log('up');
    }
    updated = st;
    }
});

You can use scroll event

var lastScrollTop = 0;
$(window).scroll(function(event){
var st = $(this).scrollTop();
if (st > lastScrollTop){
   // downscroll code
} else {
  // upscroll code
}
lastScrollTop = st;
});

I know my solution is a bit more generic - it is not dependend on any element, but it might help someone that has encountered the same problem as me.

var touchPos;

// store the touching position at the start of each touch
document.body.ontouchstart = function(e){
    touchPos = e.changedTouches[0].clientY;
}

// detect wether the "old" touchPos is 
// greater or smaller than the newTouchPos
document.body.ontouchmove = function(e){
    let newTouchPos = e.changedTouches[0].clientY;
    if(newTouchPos > touchPos) {
        console.log("finger moving down");
    }
    if(newTouchPos < touchPos) {
        console.log("finger moving up");
    }
}

The only way that I could (and tested) detect scroll down/up on mobile devices (android & ios, touch devices):

(other events such as scroll, mousewheel, DOMMouseScroll, nmousewheel and wheel do not work on mobile devices)

jQuery:

let touchStartPosX = 0;
  // Detect Scroll Down and Up in mobile(android|ios)
  $(window).on('touchmove', (e) => {
    // Different devices give different values with different decimal percentages.
    const currentPageX = Math.round(e.originalEvent.touches[0].screenY);
    if (touchStartPosX === currentPageX) return;

    if (touchStartPosX - currentPageX > 0) {
      console.log("down");
    } else {
      console.log("up");
    }
    touchStartPosX = currentPageX;
  });

Vanilla:

  let touchStartPosX = 0;
  window.addEventListener('touchmove', (e) => {
    // Different devices give different values with different decimal percentages.
    const currentPageX = Math.round(e.changedTouches[0].screenY);
    if (touchStartPosX === currentPageX) return;

    if (touchStartPosX - currentPageX > 0) {
      console.log("down");
    } else {
      console.log("up");
    }
    touchStartPosX = currentPageX;
  });

This w3schools.com documentation would help you out http://www.w3schools.com/jquerymobile/jquerymobile_events_scroll.asp

$(document).on("scrollstop",function(){
  alert("Stopped scrolling!");
});
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