将上一个/下一个按钮添加到针对 DIVS 的水平内容滚动条

Question

我已经为 div 上的一些滚动实现了 jQuery Custom Scroller，这很好用。我什至使用平滑滚动来水平滚动到某些 DIV，但我的问题是我想要一个下一个和上一个导航按钮，但我在任何地方都找不到。

下面是我的 HTML 和 jQuery。先谢谢了

<div id="source-container">
        <div class="container-inner">
                <div class="source-item item one current" id="the-cedarburg">
                    <div class="source-slide-title">
                        <h2>the cedarburg</h2>
                    </div>
                </div>
                <div class="source-item item two"  id="our-farm">


                  </div>

                </div>
                <div class="source-item item three"  id="our-rooibos">


                </div>
                <div class="source-item item four"  id="our-process">

                </div>
                <div class="source-item item five"  id="our-innovation">

                  </div>

                </div>
                <div class="source-item item six">

                </div>
                <div class="source-item item seven">

                </div>
                <div class="source-item item eight">

                </div>
                <div class="source-item item nine">

                </div>
                <div class="source-item item ten">

                </div>
                <div class="source-item item eleven">

                </div>
                <div class="source-item item twelve">

                </div>
                <div class="source-item item thirteen">

                </div>
                <div class="source-item item fourteen">

                </div>
                <div class="source-item item fifteen">

                </div>
                <div class="source-item item sixteen">

                </div>
                <div class="source-item item seventeen">

                </div>
                <div class="source-item item eighteen">

                </div>
                <div class="source-item item nineteen" >

                </div>
                <div class="source-item item twenty">

                </div>
                <div class="source-item item twentyone">

                </div>
                <div class="source-item item twentytwo">

                </div>
            </div>
    </div>
 </div>

CSS：

#source-container{
    overflow-x: hidden;
    overflow-y: hidden;
}

.source-item{
float: left;
display: inline-block;
background-repeat:no-repeat;
background-size:cover;
background-position: center;
 -moz-background-size: cover;
}

#source-container .one{background-image:url(images/source/1-the-cedarberg.jpg);}

#source-container .two{background-image:url(images/source/2-the-cedarberg.jpg);}

#source-container .three{background-image:url(images/source/3-the-cedarberg.jpg);}

#source-container .four{background-image:url(images/source/4-the-cedarberg.jpg);}

#source-container .five{background-image:url(images/source/5-the-cedarberg.jpg);}

#source-container .six{background-image:url(images/source/6-the-cedarberg.jpg);}

#source-container .seven{background-image:url(images/source/2-our-farm.jpg);}

#source-container .eight{background-image:url(images/source/1-our-farm.jpg);}

#source-container .nine{background-image:url(images/source/3-our-farm.jpg);}

#source-container .ten{background-image:url(images/source/4-our-farm.jpg);}

#source-container .eleven{background-image:url(images/source/1-our-rooibos.jpg);}

#source-container .twelve{background-image:url(images/source/6-the-cedarberg.jpg);}

#source-container .thirteen{background-image:url(images/source/1-the-cedarberg.jpg);}

#source-container .fourteen{background-image:url(images/source/2-the-cedarberg.jpg);}

#source-container .fifteen{background-image:url(images/source/3-the-cedarberg.jpg);}

#source-container .sixteen{background-image:url(images/source/4-the-cedarberg.jpg);}

#source-container .seventeen{background-image:url(images/source/5-the-cedarberg.jpg);}

#source-container .eighteen{background-image:url(images/source/6-the-cedarberg.jpg);}

#source-container .nineteen{background-image:url(images/source/1-the-cedarberg.jpg);}

#source-container .twenty{background-image:url(images/source/2-the-cedarberg.jpg);}

#source-container .twentyone{background-image:url(images/source/3-the-cedarberg.jpg);}

#source-container .twentytwo{background-image:url(images/source/4-the-cedarberg.jpg);}




.mCSB_dragger_bar{box-sizing:border-box;}

.source-item{border-right:5px solid #e1001a; border-left:5px solid #3c1c11;}

脚本：

<script>
$(function(){
 $('.container-inner').css({'width':(jQuery(window).width())*22+'px'});
    $(window).resize(function(){
        $('.container-inner').css({'width':(jQuery(window).width())*22+'px'});
    });
});

$(document).ready(function(e) {
$("#source-container").mCustomScrollbar({
                    horizontalScroll:true,
                    mouseWheelPixels: 500,
                    autoDraggerLength: false,
                    callbacks:{
                        onScroll:function(){ 
                            $("."+this.attr("id")+"-pos").text(mcs.left);
                        }
                    }
                });
});

$(function(){
 $('#source-container').css({'height':(jQuery(window).height())/100*80+'px'});
    $(window).resize(function(){
        $('#source-container').css({'height':(jQuery(window).height())/100*80+'px'});
    });
});

$(function(){
 $('.source-item').css({'width':(jQuery(window).width())+'px'});
    $(window).resize(function(){
        $('.source-item').css({'width':(jQuery(window).width())+'px'});
    });
});

$(function(){
$('.source-item').css({'height':($('#source-container').height())+'px'});
    $('#source-container').resize(function(){
        $('#source-item').css({'height':($('#source-container').height())+'px'});
    });
});
$(".output a[rel~='_mCS_2_scrollTo']").click(function(e){
                    e.preventDefault();

                    $("#source-container").mCustomScrollbar("scrollTo",$(this).attr("href"));
});
$('ul li a').on('click', function() {  
    $('ul li a.active').removeClass('active');
    $(this).addClass('active');    
});

$('.source-slide-dropdown').on('click', function() {  
    $('.source-slide-dropdown').css('border-bottom-right-radius','0px');  

});
</script>

Answer 1

如何将“Next”和“Prev”按钮连接到插件的 scrollTo 方法？ 从您提供的文档链接中，您似乎可以出于某种原因滚动到给定 ID 的元素（要求每个元素都有一个 id 而不是使用元素索引滚动）：

var elID="#el-1";
$(".content").mCustomScrollbar("scrollTo",elID);

在滚动条中获取当前项目的支持并不多，因此您可能必须自己管理（通过可以通过滚动或单击下一步/上一个按钮更新的索引）和使用上面的方法滚动到下一个div。

我使用常规滚动条（不使用插件）为此制作了fiddle。这是它的javascript源代码：

var currentElement = $("#wrapper > div:nth-child(2)");
var onScroll = function () {
    //get the current element
    var container = $("#source-container");
    var wrapper = $("#wrapper");
    var children = wrapper.children();
    var position = 0;
    for (var i = 0; i < children.length; i++) {
        var child = $(children[i]);
        var childLeft = container.offset().left < child.offset().left;
        if (childLeft) {
            currentElement = child;
            console.log(currentElement)
            return;
        }
    }
}

var indexClick = function () {
    console.log($("#inputScrollIndex").val())
    var index = parseInt($("#inputScrollIndex").val(), 10) - 1;
    if (index < 1) {
        index = 0;
    }
    console.log(index);
    scrollToIndex(index);
}

var scrollToIndex = function (index) {
    var element = $($("#wrapper").children()[index]);
    scrollToElement(element);
}

var scrollToElement = function ($element) {
    var container = $("#source-container");
    var wrapper = $("#wrapper");
    var children = wrapper.children();
    var width = 0;
    for (var i = 0; i < children.length; i++) {
        var child = $(children[i]);
        if (child.get(0) == $element.get(0)) {
            if (i == 0) {
                width = 0;
            }
            container.animate({
                scrollLeft: width
            }, 100);
            onScroll();
        }
        if (child.next().length > 0) {
            //make sure we factor in borders/padding/margin in height
            width += child.next().offset().left - child.offset().left
        } else {
            width += child.width();
        }
    }
}

var next = function (e) {
    scrollToElement(currentElement);
}

var prev = function (e) {
    var container = $("#source-container");
    if (currentElement.prev().length > 0) {
        if (container.offset().left == currentElement.prev().offset().left) {
            currentElement = currentElement.prev().prev().length > 0 ? currentElement.prev().prev() : currentElement.prev();
        } else {
            currentElement = currentElement.prev();
        }
    }
    scrollToElement(currentElement);
}

$("#source-container").scroll(onScroll);
$("#scrollIndex").click(indexClick);
$("#next").click(next);
$("#prev").click(prev);