使用字符串作为数组名

Question

我正在尝试动态获取正确数组的名称，然后显示该数组的内容。不知道该怎么做：

html:

<div class="grid" id="arrSemmes">
      <div class="grid-sizer"></div>
      <div class="grid-item"><img src="img/2019/s1-thumb.jpg" /></div>
      <div class="grid-item"><img src="img/2019/s2-thumb.jpg" /></div>
      <div class="grid-item"><img src="img/2019/s3-thumb.jpg" /></div>
      <div class="grid-item"><img src="img/2019/s4-thumb.jpg" /></div>
</div>

jquery:

    var thisIndex;
    var arrSemmes = [
        ["2019/s1.jpg", "caption1"],
        ["2019/s2.jpg", "caption2"],
        ["2019/s3.jpg", "caption3"],
        ["2019/s4.jpg", "caption4"],
    ];

$('.grid-item img').on('click', function() {
        var thisArray = $(this).parent().parent().attr('id'); //returns a string: arrSemmes
        thisIndex = $(this).attr('src');
        thisIndex = thisIndex.replace('-thumb.jpg','');
        thisIndex = thisIndex.replace('img/2019/s','');
        thisIndex = thisIndex--; //must be one less for the array key
        alert(thisArray[thisIndex][0]); //thinks I want a letter in the string "thisArray"
    });

Answer 1

简化您的逻辑。使用数据属性并移除基于位置的逻辑。

根据您的评论，我还包含了上一个和下一个按钮的逻辑，使用一个类来识别哪个图像是当前图像，并进行相应的调整。

var $images = $('.grid-item img').on('click', function() {
  var $img = $(this);
  console.log($img.data('src'), $img.data('caption'));
  
  $images.removeClass('current');
  $img.addClass('current');
});

function adjustCurrentImage ( adjustment ) {
  var currentImageIndex = $images.index($images.filter('.current'));
  var nextImageIndex = currentImageIndex + adjustment;
  
  if (-1 < nextImageIndex && nextImageIndex < $images.length) {
    $images.removeClass('current');
    $images.eq(nextImageIndex).addClass('current');
    console.log($images.eq(nextImageIndex).data('src'), $images.eq(nextImageIndex).data('caption'));
  }
}

$('#prev').on('click', function(){ adjustCurrentImage(-1); });
$('#next').on('click', function(){ adjustCurrentImage(1); });

<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
<div class="grid" id="arrSemmes">
  <div class="grid-sizer"></div>
  <div class="grid-item"><img src="img/2019/s1-thumb.jpg" data-src="2019/s1.jpg" data-caption="caption1" /></div>
  <div class="grid-item"><img src="img/2019/s2-thumb.jpg" data-src="2019/s2.jpg" data-caption="caption2" /></div>
  <div class="grid-item"><img src="img/2019/s3-thumb.jpg" data-src="2019/s3.jpg" data-caption="caption3" /></div>
  <div class="grid-item"><img src="img/2019/s4-thumb.jpg" data-src="2019/s4.jpg" data-caption="caption4" /></div>
</div>
<button id="prev">Previous Image</button>
<button id="next">Next Image</button>