javascript - 为缩略图库和更大的图像库添加下一个和上一个按钮

Question

我正在尝试为缩略图和更大的图片库添加下一个和上一个按钮。下一个和上一个按钮也应该支持键盘事件监听器。

这是我尝试过的链接。

http://jsfiddle.net/L7yKp/36/

我需要帮助。

Answer 1

在这里，我已经完成了添加下一个和上一个按钮的上述问题的完整解决方案。

演示： http ://codebins.com/bin/4ldqp7y

HTML

<div id="panel">
  <div class="controls">
    <img src="http://aux.iconpedia.net/uploads/1698581142461241089.png" class="prev" />
    <span>
      Thumbnail Navigation 
    </span>
    <img src="http://cdn1.iconfinder.com/data/icons/fatcow/32x32_0760/resultset_next.png" class="next" />
  </div>


  <div id="thumbs">
    <div class="thumb active">
      <img src="http://images.replacements.com/images/images5/china/C/lenox_china_garden_birds_no_box_P0000014675S0122T2.jpg" width="100" height="80" />
    </div>
    <div class="thumb">
      <img src="http://coolfunnyanimals.com/thumb/funny-animal-bird-47.jpg" width="100" height="80" />
    </div>
    <div class="thumb">
      <img src="http://learnordie.files.wordpress.com/2012/05/thrasher.jpg" width="100" height="80" />
    </div>
    <div class="thumb">
      <img src="http://3.bp.blogspot.com/_N_mOB63qPaE/TSC17ceXRII/AAAAAAAARaQ/TeDi9FYIBPw/s1600/Flying-Bird-Picture-2.jpg" width="100" height="80" />
    </div>
    <div class="thumb">
      <img src="http://www.kevinhearne.com/wp-content/uploads/2011/11/pic6.jpg" width="100" height="80" />
    </div>
  </div>


  <div class="controls" align="center" width="400px">
    <img src="http://aux.iconpedia.net/uploads/1698581142461241089.png" class="prev" />
    <span>
      Large Image Navigation 
    </span>
    <img src="http://cdn1.iconfinder.com/data/icons/fatcow/32x32_0760/resultset_next.png" class="next" />
  </div>


  <div id="large">
    <div class="bigthumb active">
      <img src="http://images.replacements.com/images/images5/china/C/lenox_china_garden_birds_no_box_P0000014675S0122T2.jpg" />
    </div>
    <div class="bigthumb">
      <img src="http://coolfunnyanimals.com/thumb/funny-animal-bird-47.jpg" />
    </div>
    <div class="bigthumb">
      <img src="http://learnordie.files.wordpress.com/2012/05/thrasher.jpg" />
    </div>
    <div class="bigthumb">
      <img src="http://3.bp.blogspot.com/_N_mOB63qPaE/TSC17ceXRII/AAAAAAAARaQ/TeDi9FYIBPw/s1600/Flying-Bird-Picture-2.jpg" />
    </div>
    <div class="bigthumb">
      <img src="http://www.kevinhearne.com/wp-content/uploads/2011/11/pic6.jpg" />
    </div>
  </div>
</div>

CSS：

#thumbs{
  text-align:center;
  background:#77a5c6;
  padding:5px;
}
.thumb{
  display:inline-block;
  margin:0px;
  padding:0px;
  cursor:pointer;
}
#thumbs .active{
  border:3px solid #333;
}
.controls{
  margin-left:10px;
}
.controls img{
  cursor:pointer;
  margin:0px;
}
.controls span{
  font-size:13px;
  display:inline-block;
  vertical-align:top;
  margin-top:5px;
}
#large{
  text-align:center;
}
#large .bigthumb{
  display:none;
}
#large .active{
  display:block;
}
#large .active img{
  border:2px solid #333;
}

jQuery：

$(function() {
    $("#thumbs").find(".thumb:first").addClass("active");
    $("#large").find(".bigthumb:first").addClass("active");

    var getIndex = $("#thumbs").find(".active").index();

    $(".controls").each(function() {
        $(this).find(".next").click(function() {
            getIndex = $("#thumbs").find(".active").index();
            getIndex += 1;
            if (getIndex > ($("#thumbs").find(".thumb").length - 1)) {
                getIndex = 0;
            }
            setActiveImage(getIndex);
        });
        $(this).find(".prev").click(function() {
            getIndex -= 1;
            if (getIndex < 0) {
                getIndex = $("#thumbs").find(".thumb").length - 1;
            }
            setActiveImage(getIndex); //Set/Show Active Image
        });
    });

});

function setActiveImage(index) {
    if (typeof(index) == "undefined" || index == "" || index == null) index = 0;

    $("#thumbs").find(".thumb").removeClass("active");
    $("#thumbs").find(".thumb:eq(" + index + ")").addClass("active");
    $("#large").find(".bigthumb").removeClass("active");
    $("#large").find(".bigthumb:eq(" + index + ")").addClass("active");
}

演示： http ://codebins.com/bin/4ldqp7y

Answer 2

见http://jsfiddle.net/L7yKp/37/

问题是

$(['next','prev']).each(function(){
    var that=this;
    $('#'+that).click(function(){
        $('#thumbs img.clicked')[that]().click();
    });
});

因为现在你有

<a href="#" id="tnext">Next</a>
<a href="#" id="tprev">Prev</a>

和

<a href="#" id="lnext">Next</a>
<a href="#" id="lprev">Prev</a>

所以解决方案是；

$(['next','prev']).each(function(){
    var that=this;
    $('.'+that).click(function(){
        $('#thumbs .clicked')[that]().click();
    });
});

和

<a href="#" class="next">Next</a>
<a href="#" class="prev">Prev</a>