javascript - 动态 slider 双内容显示

Question

我正在尝试使 W3 slider 动态化原始 slider 来自 this-link

我想以一种只显示所有底部图像并且只显示顶部当前图像的方式制作它，请参阅此链接以便更好地理解。

在我的代码中，所有内容都显示为双倍。

这是我的 slider 代码:

       <section id="slider">
    <div class="container wow fadeInUp">
      <div class="row">
        <div class="col-md-12">
         <h3 class="section-title">Photo Gallery</h3>
         <div class="section-title-divider"></div>
  <div class="w3-content" style="max-width:1200px">
                                                                <?php 

include("admin/db/db.php");


$select_db = "select * from gallery";

$run_events = mysql_query($select_db);

while($row=mysql_fetch_array($run_events)){


    $id = $row['id'];
      $image= $row['image'];

?>
  <img class="mySlides" src="admin/images/gallery/<?php echo $image; ?>" style="width:100%;height:350px;">
  <div class="w3-row-padding w3-section">
    <div class="w3-col s4">
      <img class="demo w3-opacity w3-hover-opacity-off" src="admin/images/gallery/<?php echo $image; ?>" style="width:100%" onclick="currentDiv(<?php echo $id; ?>)">
    </div>
<?php }?>

  </div>
</div>
<script>
var slideIndex = 1;
showDivs(slideIndex);

function plusDivs(n) {
  showDivs(slideIndex += n);
}

function currentDiv(n) {
  showDivs(slideIndex = n);
}

function showDivs(n) {
  var i;
  var x = document.getElementsByClassName("mySlides");
  var dots = document.getElementsByClassName("demo");
  if (n > x.length) {slideIndex = 1}
  if (n < 1) {slideIndex = x.length}
  for (i = 0; i < x.length; i++) {
     x[i].style.display = "none";
  }
  for (i = 0; i < dots.length; i++) {
     dots[i].className = dots[i].className.replace(" w3-opacity-off", "");
  }
  x[slideIndex-1].style.display = "block";
  dots[slideIndex-1].className += " w3-opacity-off";
}
</script>

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

  </section> 

Answer 1

您需要用这个替换您的代码并查看:

<section id="slider">
    <div class="container wow fadeInUp">
      <div class="row">
        <div class="col-md-12">
         <h3 class="section-title">Photo Gallery</h3>
         <div class="section-title-divider"></div>
  <div class="w3-content" style="max-width:1200px">

<?php 

include("admin/db/db.php");

$select_db = "select * from gallery";
$run_events = mysql_query($select_db);
while($row=mysql_fetch_array($run_events)){

    $id = $row['id'];
      $image= $row['image'];

?>
  <img class="mySlides" src="admin/images/gallery/<?php echo $image; ?>" style="width:100%;height:350px;">
  <div class="w3-row-padding w3-section">
    <div class="w3-col s4">
      <img class="demo w3-opacity w3-hover-opacity-off" src="admin/images/gallery/<?php echo $image; ?>" style="width:100%" onclick="currentDiv(<?php echo $id; ?>)">
    </div>
  </div>
<?php }?>

</div>

<script>
var slideIndex = 1;
showDivs(slideIndex);

function plusDivs(n) {
  showDivs(slideIndex += n);
}

function currentDiv(n) {
  showDivs(slideIndex = n);
}

function showDivs(n) {
  var i;
  var x = document.getElementsByClassName("mySlides");
  var dots = document.getElementsByClassName("demo");
  if (n > x.length) {slideIndex = 1}
  if (n < 1) {slideIndex = x.length}
  for (i = 0; i < x.length; i++) {
     x[i].style.display = "none";
  }
  for (i = 0; i < dots.length; i++) {
     dots[i].className = dots[i].className.replace(" w3-opacity-off", "");
  }
  x[slideIndex-1].style.display = "block";
  dots[slideIndex-1].className += " w3-opacity-off";
}
</script>

        </div>
      </div>

    </div>
</section>