Question

我试着寻找这个，但我找不到直接相关的东西。我是jQuery / Javascript的新手，所以任何帮助将不胜感激！谢谢！

我有一个自定义滑块，功能上有3个幻灯片，我使用jQuery在幻灯片之间来回切换。每张幻灯片的宽度为1040像素。每张幻灯片都相对定位，并向左浮动。

当我的滑块位于开头时我想隐藏我的“按钮右键”（所以你不要滚动到空白区域），当我的滑块在末尾时隐藏我的“按钮左”（再次，所以你不要滚动到空白区域。）

我可以用什么逻辑来做这件事？

$(function(){
$(".button-right").click(function() {
    $(".portfolioSection").animate({left: "-=1040" }, "slow");
}); });

$(function(){
$(".button-left").click(function() {
    $(".portfolioSection").animate({left: "+=1040" }, "slow");
}); });

这是HTML

<div class="portfolioImg" style="background-image: url(images/featured-flushed.jpg);">
    <div class="portfolioImgOver">
        <div class="button-right">Next</div>
        <div class="button-left">Back</div>
        <div class="portfolioSection">
            <div class="finley"></div>
            <div class="portfolioContent">
                <h2>Flushed</h2><br/><br/>Flushed was a project planned for release on mobile platforms.<br /><br />My responsibilities for Flushed included: establishing a visual direction for the game, creating stylized 3D models, and developing technical game art, including textures, user interfaces and sprite sheets.<br /><br />I also worked with another artist to guide and assist with creating concept art, story mechanics and level designs.<br /><br /><span style="font-size:10px; color:#aaa;">Flushed is owned by Applied Studios, LLC.</span>
            </div>
        </div>

        <div class="portfolioSection">
            <div class="portfolioContent">
                <h2>WHOA! Another div</h2><br/><br/>Here is some crazy cool stuff that I bet you thought you would never see.
            </div>
        </div>

        <div class="portfolioSection">
            <div class="portfolioContent">
                <h2>WHOA! Another div</h2><br/><br/>Here is some crazy cool stuff that I bet you thought you would never see. 
            </div>
        </div>

        <div class="clear"></div>

    </div>
</div>

这是CSS

<style>.portfolioImg {width:1040px; height:600px; background-color:#efefef; margin-bottom:150px; z-index:1; overflow:hidden;}.portfolioImgOver{width:2080px; height:600px; background: rgba(25,25,25,.94);margin-bottom:150px; display:none; z-index:2; left:0px; position:relative;}.portfolioSection{width:1040px; height:600px; position:relative; float:left;}.portfolioContent{width:300px; color:#dedede; padding:40px; float:left; line-height:22px;}.portfolioContent a{color:#dedede; border-bottom:dotted 1px #888; padding-bottom:1px; text-decoration:none;}.button-right {width:60px; background:#333; color:#fff; padding:10px; position:absolute; z-index:3; right:1040px; top:300px; cursor:pointer; transition: all 0.6s ease 0s; -webkit-transition: all 0.6s ease 0s;}.button-right:hover {background:#777; transition: all 0.6s ease 0s; -webkit-transition: all 0.6s ease 0s;}.button-left {width:60px; background:#333; color:#fff; padding:10px; position:absolute; z-index:3; left:0px; top:300px; cursor:pointer; transition: all 0.6s ease 0s; -webkit-transition: all 0.6s ease 0s;}.button-left:hover {background:#777; transition: all 0.6s ease 0s; -webkit-transition: all 0.6s ease 0s;}</style>

以下是该页面的链接：

http://alanvitek.com/dev

Answer 1

尝试为幻灯片设置变量（可能在数组中），然后检查它是否是第一个，隐藏左键。如果是最后一个，请隐藏右键。

$('.button-left').hide()

Answer 2

尝试

jQuery(function($){
    var sec = $('.portfolioSection'), secwidth = sec.width(), unit = 1040;

    $(".button-right").click(function() {
        var left = sec.css('left');
        left = Math.abs(parseInt(left.substring(0, left.length - 2)))
        if(left + unit >= secwidth){
            $(this).hide()
        }

        sec.animate({left: "-=" + unit }, "slow");
        $(".button-left").show();
    });


    $(".button-left").click(function() {
        var left = sec.css('left');
        if(left == '-' + unit + 'px'){
            $(this).hide()
        }
        sec.animate({left: "+=" + unit }, "slow");
        $(".button-right").show();
    });
})

演示：Fiddle

Answer 3

设置状态变量。 1是第一张幻灯片，2是第二张幻灯片，依此类推。在每个按键上按1或减1.然后，你可以执行以下操作：

if(variable == 1)$('.button-left').hide()

jQuery - 从Slider中删除Next，Prev按钮

3 个答案: