给定位置时图像消失：绝对

Question

我有一个相对定位的 div 中的图像列表。为了将图像堆叠在一起，我试图绝对定位它们。

但是，一旦我将position: absolute 应用于图像，它就会消失。我正在使用 jcarouselite 作为轮播，所以我不确定 jcarousel 脚本中的某些内容是否会导致此问题。

#sliderContainer {
  position: relative;
}
#sliderBtnPrev {
  position: absolute;
  top: 250px;
  z-index: 9999;
}
#sliderBtnPrev img {
  margin: 0px 30px;
  cursor: pointer;
}
#sliderBtnNext {
  position: absolute;
  top: 250px;
  right: 50px;
  z-index: 9999;
}
#sliderBtnNext img {
  cursor: pointer;
}
.slideImg {
  width: 100%;
  height: auto;
  vertical-align: middle;
  position: absolute;
}
.slideTxt {
  float: left;
  margin: -278px 0px 0px 150px;
  background: rgba(20, 0, 17, .5);
  width: 380px;
  border: 1px solid #000000;
  z-index: 100;
  color: #ffffff;
  font-size: 26px;
}

<div id="sliderContainer">
  <div id="sliderBtnPrev">
    <img src='http://www.placehold.it/200' alt="Previous">
  </div>
  <!-- end of sliderBtnPrev -->
  <div id="sliderBtnNext">
    <img src='http://www.placehold.it/200' alt="Next">
  </div>

  <ul>
    <li>
      <img src="http://www.placehold.it/200" alt="Slide" class="slideImg">
      <p class="slideTxt">For every service rendered, for every man hour utilized, we make it count for you through quality training delivery service.
      </p>
    </li>
    <li>
      <img src="http://www.placehold.it/200" alt="Slide" class="slideImg">
      <p class="slideTxt">Lorem ipsum id aptent suscipit curae donec nunc dolor,consectetur congue dolor viverra euismod.
      </p>
    </li>
    <li>
      <img src="http://www.placehold.it/200" alt="Slide" class="slideImg">
      <p class="slideTxt">Lorem ipsum id aptent suscipit curae donec nunc dolor,consectetur congue dolor viverra euismod.
      </p>
    </li>
  </ul>
</div>
<!-- end of sliderContainer -->

Jcarouselite code

    // JavaScript Document
(function($){$.fn.jCarouselLite=function(o){o=$.extend({btnPrev:null,btnNext:null,btnGo:null,mouseWheel:false,auto:null,speed:200,easing:null,vertical:false,circular:true,visible:3,start:0,scroll:1,beforeStart:null,afterEnd:null},o||{});
	return this.each(function(){var b=false,animCss=o.vertical?"top":"left",sizeCss=o.vertical?"height":"width";
	var c=$(this),ul=$("ul",c),tLi=$("li",ul),tl=tLi.size(),v=o.visible;if(o.circular){ul.prepend(tLi.slice(tl-v-1+1).clone()).append(tLi.slice(0,v).clone());
		o.start+=v}var f=$("li",ul),itemLength=f.size(),curr=o.start;c.css("visibility","visible");f.css({overflow:"hidden",float:o.vertical?"none":"left"});
		ul.css({margin:"0",padding:"0",position:"relative","list-style-type":"none","z-index":"1"});c.css({overflow:"hidden",position:"relative","z-index":"2",left:"0px"});
		var g=o.vertical?height(f):width(f);var h=g*itemLength;var j=g*v;f.css({width:f.width(),height:f.height()});ul.css(sizeCss,h+"px").css(animCss,-(curr*g));
		c.css(sizeCss,j+"px");if(o.btnPrev)$(o.btnPrev).click(function(){return go(curr-o.scroll)});if(o.btnNext)$(o.btnNext).click(function(){return go(curr+o.scroll)});
		if(o.btnGo)$.each(o.btnGo,function(i,a){$(a).click(function(){return go(o.circular?o.visible+i:i)})});if(o.mouseWheel&&c.mousewheel)c.mousewheel(function(e,d){return d>0?go(curr-o.scroll):go(curr+o.scroll)});
		if(o.auto)setInterval(function(){go(curr+o.scroll)},o.auto+o.speed);function vis(){return f.slice(curr).slice(0,v)};function go(a){if(!b){if(o.beforeStart)o.beforeStart.call(this,vis());if(o.circular){if(a<=o.start-v-1){ul.css(animCss,-((itemLength-(v*2))*g)+"px");curr=a==o.start-v-1?itemLength-(v*2)-1:itemLength-(v*2)-o.scroll}else if(a>=itemLength-v+1){ul.css(animCss,-((v)*g)+"px");curr=a==itemLength-v+1?v+1:v+o.scroll}else curr=a}else{if(a<0||a>itemLength-v)return;
			else curr=a}b=true;ul.animate(animCss=="left"?{left:-(curr*g)}:{top:-(curr*g)},o.speed,o.easing,function(){if(o.afterEnd)o.afterEnd.call(this,vis());b=false});if(!o.circular){$(o.btnPrev+","+o.btnNext).removeClass("disabled");$((curr-o.scroll<0&&o.btnPrev)||(curr+o.scroll>itemLength-v&&o.btnNext)||[]).addClass("disabled")}}return false}})};function css(a,b){return parseInt($.css(a[0],b))||0};function width(a){return a[0].offsetWidth+css(a,'marginLeft')+css(a,'marginRight')};function height(a){return a[0].offsetHeight+css(a,'marginTop')+css(a,'marginBottom')}})(jQuery);

what i have in my functions.js

// JavaScript Document
$(window).load(function(){
   //Activate the Slider
   $("#sliderContainer").jCarouselLite({
	   btnNext: "#sliderBtnNext",
	   btnPrev: "#sliderBtnPrev",
	   visible:1,
	   circular:true,
	   scroll:1
	});
 });

Answer 1

您已将第一张图片定义为 position: relative 和 position: absolute。这会导致错误吗？

您的代码：

#sliderContainer {
  position: relative;
}
#sliderBtnPrev {
  position: absolute;


<div id="sliderContainer">
  <div id="sliderBtnPrev">
    <img src='http://www.placehold.it/200' alt="Previous">
  </div>