迭代地显示一组图像，每次只显示一个

Iteratively displaying a set of images, showing only 1 at a time

本文关键字：显示 一个 一组 迭代 图像      更新时间：2023-09-26

是否有一种方法可以循环遍历一组图像，依次显示每个图像(每次只显示1个，每个新图像与前一个在同一位置)?我该如何做到这一点?

我设法用jQuery创建这种效果，我在每个图像中淡出和淡出。有没有一种方法可以用JavaScript做到这一点，而不需要额外的库?

我用这段代码来做你说的。

注意:它将在最后一张图像上停止。

<script type="text/javascript">
// <!--
var imagePaths = ["images/slide1.jpg", "images/slide2.jpg", "images/slide3.jpg"];
var showCanvas = null;
var showCanvasCtx = null;
var img = document.createElement("img");
var currentImage = 0;
var revealTimer;
var timeoutVariable = 3000;
window.onload = function () {
  showCanvas = document.getElementById('SlideShowCanvas');
  showCanvasCtx = showCanvas.getContext('2d');
  img.setAttribute('width', '560');
  img.setAttribute('height', '343');
  switchImage();
  setInterval(switchImage, timeoutVariable);
}
function switchImage() {
// Loop once
if (currentImage >= imagePaths.length) {
  clearInterval(revealTimer);
  clearTimeout(timeoutVariable);
} else {
  img.setAttribute('src', imagePaths[currentImage++]);
  showCanvasCtx.globalAlpha = 0.1;
  revealTimer = setInterval(revealImage, 100);
}
function revealImage() {
  showCanvasCtx.save();
  showCanvasCtx.drawImage(img, 0, 0, 560, 343);
  showCanvasCtx.globalAlpha += 0.1;
  if (showCanvasCtx.globalAlpha > 1.0)
  clearInterval(revealTimer);
  showCanvasCtx.restore();
}
// -->
</script>
<标题>糟糕h1> 记添加html 
<canvas id="SlideShowCanvas" style="width: 560px; height: 343px;" width="560px" height="343px">
  <div style="width: 560px; text-align: center; vertical-align: middle; height: 343px; border: 1px solid #C0C0C0;">
    <span style="width: 560px; height: 343px;">
      <br /><br />Your browser does not support<br />the html5 canvas object!<br /><br /><a href="http://www.microsoft.com/ie">Click Here To Download Microsoft's</a><br />Feature Rich Internet Explorer Web Browser<br />
    </span>
  </div>
</canvas>
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