权限没有，则隐藏 function forum_list_access_filter($forumlist, $gid, $allow = 'allowread') { global $grouplist; if (empty($forumlist)) return array(); if (1 == $gid) return $forumlist; $forumlist_filter = $forumlist; $group = $grouplist[$gid]; foreach ($forumlist_filter as $fid => $forum) { if (empty($forum['accesson']) && empty($group[$allow]) || !empty($forum['accesson']) && empty($forum['accesslist'][$gid][$allow])) { unset($forumlist_filter[$fid]); } unset($forumlist_filter[$fid]['accesslist']); } return $forumlist_filter; } function forum_filter_moduid($moduids) { $moduids = trim($moduids); if (empty($moduids)) return ''; $arr = explode(',', $moduids); $r = array(); foreach ($arr as $_uid) { $_uid = intval($_uid); $_user = user_read($_uid); if (empty($_user)) continue; if ($_user['gid'] > 4) continue; $r[] = $_uid; } return implode(',', $r); } function forum_safe_info($forum) { //unset($forum['moduids']); return $forum; } function forum_filter($forumlist) { foreach ($forumlist as &$val) { unset($val['brief'], $val['announcement'], $val['seo_title'], $val['seo_keywords'], $val['create_date_fmt'], $val['icon_url'], $val['modlist']); } return $forumlist; } function forum_format_url($forum) { global $conf; if (0 == $forum['category']) { // 列表URL $url = url('list-' . $forum['fid'], '', FALSE); } elseif (1 == $forum['category']) { // 频道 $url = url('category-' . $forum['fid'], '', FALSE); } elseif (2 == $forum['category']) { // 单页 $url = url('read-' . trim($forum['brief']), '', FALSE); } if ($conf['url_rewrite_on'] > 1 && $forum['well_alias']) { if (0 == $forum['category'] || 1 == $forum['category']) { $url = url($forum['well_alias'], '', FALSE); } elseif (2 == $forum['category']) { // 单页 $url = ($forum['threads'] && $forum['brief']) ? url($forum['well_alias'] . '-' . trim($forum['brief']), '', FALSE) : url($forum['well_alias'], '', FALSE); } } return $url; } function well_forum_alias() { $forumlist = forum_list_cache(); if (empty($forumlist)) return ''; $key = 'forum-alias'; static $cache = array(); if (isset($cache[$key])) return $cache[$key]; $cache[$key] = array(); foreach ($forumlist as $val) { if ($val['well_alias']) $cache[$key][$val['fid']] = $val['well_alias']; } return array_flip($cache[$key]); } function well_forum_alias_cache() { global $conf; $key = 'forum-alias-cache'; static $cache = array(); // 用静态变量只能在当前 request 生命周期缓存，跨进程需要再加一层缓存：redis/memcached/xcache/apc if (isset($cache[$key])) return $cache[$key]; if ('mysql' == $conf['cache']['type']) { $arr = well_forum_alias(); } else { $arr = cache_get($key); if (NULL === $arr) { $arr = well_forum_alias(); !empty($arr) AND cache_set($key, $arr); } } $cache[$key] = empty($arr) ? '' : $arr; return $cache[$key]; } ?>jquery - Javascript - Infinite scroll JSON array? - Stack Overflow

科技改变生活-雨落星辰 - 所有的伟大,都源于一个勇敢的开始

    最新消息：雨落星辰是一个专注网站SEO优化、网站SEO诊断、搜索引擎研究、网络营销推广、网站策划运营及站长类的自媒体原创博客
    你的位置： 首页>programmer>jquery - Javascript - Infinite scroll JSON array? - Stack Overflow

    jquery - Javascript - Infinite scroll JSON array? - Stack Overflow

    programmeradmin7浏览0评论

    I have JavaScript like that:

    items.forEach(function (item, index, arr) {
                console.log(item.price);
                var message = 'BitSkins Price: $' + item.bprice + '';
                if (item.price != null) {
                    if (item.bprice == '') {
                        message = 'Item never sold on BitSkins!';
                    }
                    if (item.name != 'Operation Phoenix Case Key' && item.name != 'CS:GO Case Key' && item.name != 'Winter Offensive Case Key' && item.name != 'Revolver Case Key' && item.name != 'Operation Vanguard Case Key' && item.name != 'Operation Wildfire Case Key' && item.name != 'Shadow Case Key' && item.name != 'Operation Breakout Case Key' && item.name != 'Chroma Case Key' && item.name != 'Huntsman Case Key' && item.name != 'Falchion Case Key' && item.name != 'Chroma 2 Case Key') {
                        $("#inventory").html($("#inventory").html() + "<li class='col 2' style='padding:8px;font-weight:bold;font-size:16px'><div class='card item-card waves-effect waves-light' style='margin:0%;min-height:295px;width:245.438px;border-radius: 15px;' id='" + item.id + "'><div class='iteam' style='text-decoration: underline;text-align: left'>" + item.name + "</div><div class='condition' style='text-align: left;text-size:13px'>" + item.condition + "</div><div class='center-align' style='padding:6%'><img title=\"" + item.originalname + "\" draggable='false' src='/" + item.iconurl + "/200fx200'><div class 'floatvalue'>Float: 0.11503319442272186<div class='bitskinsp' style='font-weight: normal;font-size:12px'>" + message + "</div><div class='buyer-price center-align'>$" + numberWithCommas(item.price) + "</li></div></div>");
                    }
                }
            });

    Which adds each item in array to the html and then shows there. items array containts JSON, which could be 1000 different items. How could I add infinite scroll on that JavaScript? Example: It will show first 50 items, then if you scroll another 50.. Also, sort them by the price (I got it in code already).

    I have JavaScript like that:

    items.forEach(function (item, index, arr) {
                console.log(item.price);
                var message = 'BitSkins Price: $' + item.bprice + '';
                if (item.price != null) {
                    if (item.bprice == '') {
                        message = 'Item never sold on BitSkins!';
                    }
                    if (item.name != 'Operation Phoenix Case Key' && item.name != 'CS:GO Case Key' && item.name != 'Winter Offensive Case Key' && item.name != 'Revolver Case Key' && item.name != 'Operation Vanguard Case Key' && item.name != 'Operation Wildfire Case Key' && item.name != 'Shadow Case Key' && item.name != 'Operation Breakout Case Key' && item.name != 'Chroma Case Key' && item.name != 'Huntsman Case Key' && item.name != 'Falchion Case Key' && item.name != 'Chroma 2 Case Key') {
                        $("#inventory").html($("#inventory").html() + "<li class='col 2' style='padding:8px;font-weight:bold;font-size:16px'><div class='card item-card waves-effect waves-light' style='margin:0%;min-height:295px;width:245.438px;border-radius: 15px;' id='" + item.id + "'><div class='iteam' style='text-decoration: underline;text-align: left'>" + item.name + "</div><div class='condition' style='text-align: left;text-size:13px'>" + item.condition + "</div><div class='center-align' style='padding:6%'><img title=\"" + item.originalname + "\" draggable='false' src='https://steammunity-a.akamaihd/economy/image/" + item.iconurl + "/200fx200'><div class 'floatvalue'>Float: 0.11503319442272186<div class='bitskinsp' style='font-weight: normal;font-size:12px'>" + message + "</div><div class='buyer-price center-align'>$" + numberWithCommas(item.price) + "</li></div></div>");
                    }
                }
            });

    Which adds each item in array to the html and then shows there. items array containts JSON, which could be 1000 different items. How could I add infinite scroll on that JavaScript? Example: It will show first 50 items, then if you scroll another 50.. Also, sort them by the price (I got it in code already).

    • javascript
    • jquery
    • arrays
    • json
    Share Improve this question asked May 7, 2016 at 12:03 Jacob RevestusJacob Revestus 751 silver badge6 bronze badges 2
    • 1 Possible duplicate of jQuery load more data on scroll – Jean-Luc Barat Commented May 7, 2016 at 12:08
    • So you want to add a sort of paging to your displayed array? – kies Commented May 8, 2016 at 8:23
    Add a ment  | 

    4 Answers 4

    Reset to default 2

    You can easily do it like this: 

    var perPage = 50;

function paginate(items, page) {
  var start = perPage * page;
  return items.slice(start, start + perPage);
}

function renderItems(pageItems) {
  pageItems.forEach(function (item, index, arr) {
    var message = 'BitSkins Price: $' + item.bprice + '';
    if (item.price != null) {
      if (item.bprice == '') {
        message = 'Item never sold on BitSkins!';
      }
      if (item.name != 'Operation Phoenix Case Key' && item.name != 'CS:GO Case Key' && item.name != 'Winter Offensive Case Key' && item.name != 'Revolver Case Key' && item.name != 'Operation Vanguard Case Key' && item.name != 'Operation Wildfire Case Key' && item.name != 'Shadow Case Key' && item.name != 'Operation Breakout Case Key' && item.name != 'Chroma Case Key' && item.name != 'Huntsman Case Key' && item.name != 'Falchion Case Key' && item.name != 'Chroma 2 Case Key') {
        $("#inventory").append("<li class='col 2' style='padding:8px;font-weight:bold;font-size:16px'><div class='card item-card waves-effect waves-light' style='margin:0%;min-height:295px;width:245.438px;border-radius: 15px;' id='" + item.id + "'><div class='iteam' style='text-decoration: underline;text-align: left'>" + item.name + "</div><div class='condition' style='text-align: left;text-size:13px'>" + item.condition + "</div><div class='center-align' style='padding:6%'><img title=\"" + item.originalname + "\" draggable='false' src='https://steammunity-a.akamaihd/economy/image/" + item.iconurl + "/200fx200'><div class 'floatvalue'>Float: 0.11503319442272186<div class='bitskinsp' style='font-weight: normal;font-size:12px'>" + message + "</div><div class='buyer-price center-align'>$" + numberWithCommas(item.price) + "</li></div></div>");
      }
    }
  });
}

$(document).ready(function() {
  var win = $(window);
  var page = 0;
  renderItems(paginate(items, page));

  // Each time the user scrolls
  win.scroll(function() {
    // End of the document reached?
    if ($(document).height() - win.height() == win.scrollTop()) {
      page++;
      renderItems(paginate(items, page));
    }
  });
});

    Or using jQuery endlessScroll plugin

    $(document).ready(function() {
  $(window).endlessScroll({
    inflowPixels: 300,
    callback: function() {
      //append new items to your list
    }
  });
});

    How about writing a small function that checks scroll position and fires a ajax call to get more data or just get the next slot of data from your json object and bind it to HTML. something as below:

    $(window).scroll(function() {
    if($(window).scrollTop() == $(document).height() - $(window).height()) {
           // ajax call or some other logic to show data here
    }
});

    Or you can use one of the so many plugins, I am using Waypoint for one of the same thing.

    Try using additional variables like current page (if you have 1000 items and you show 50 in each, then you'll have a max of 20 pages to show), number of items on a page, start index and end index.

    Assume:

    var currPage = 0; //(First page)

    var itemsInPage = 50; //NUMBER OF ITEMS IN A PAGE

    Then for every scroll, calculate the startItem index and endItem index.

    startItem = currPage * itemsInPage;//FOR FIRST PAGE, THIS IS 0

    endItem = startItem + itemsInPage; //AND THIS IS 50

    In the forEach loop, check if( index >= startItem && index < endItem ) and display only those items.

    You will have to increment the currPage after every scroll and at the beginning of the forEach loop, add:

    if( currPage > Math.ceil( items.length/itemsInPage ) ) currPage = 1;

    (Round up using ceil because if length of 'items' is not perfectly divisible by 'itemsinpage', then they add up as an additional page)

    If you can use a third party take a look here Infinite ajax scroll.

    Or as explain in similar asked question use JQuery Waypoint plugin

    与本文相关的文章

    发布评论

    评论列表(0)

    1. 暂无评论