Question

美好的一天朋友，

你能帮我解决一下吗？我有一个图像幻灯片（3张图片）。它显示页面加载时的第一个图像。现在，它不是转移到第二张图像，而是显示一个空的＆＃34; div直到你点击下一个按钮。

下一个和上一个按钮100％正常工作。但我只想让它在几秒钟（10秒）后自动移动到下一张图像。

我的CSS

/ ********************

*   Animation Styles   *
********************/

/* Slideshow container */
.slideshow-container {
  max-width: 1000px;
  position: relative;
  margin: auto;
}

/* Next & previous buttons */
.prev, .next {
  cursor: pointer;
  position: absolute;
  top: 0;
  top: 50%;
  width: auto;
  margin-top: -22px;
  padding: 16px;
  color: white;
  font-weight: bold;
  font-size: 18px;
  transition: 1.6s ease;
  border-radius: 0 3px 3px 0;
}

/* Position the "next button" to the right */
.next {
  right: 0;
  border-radius: 3px 0 0 3px;
}

/* On hover, add a black background color with a little bit see-through */
.prev:hover, .next:hover {
  background-color: rgba(0,0,0,0.8);
}

/* Caption text */
.text {
  color: #f2f2f2;
  font-size: 15px;
  padding: 8px 12px;
  position: absolute;
  bottom: 8px;
  width: 100%;
  text-align: center;
}

/* Number text (1/3 etc) */
.numbertext {
  color: #f2f2f2;
  font-size: 12px;
  padding: 8px 12px;
  position: absolute;
  top: 0;
}

/* The dots/bullets/indicators */
.dot {
  cursor:pointer;
  height: 13px;
  width: 13px;
  margin: 0 2px;
  background-color: #bbb;
  border-radius: 50%;
  display: inline-block;
  transition: background-color 0.6s ease;
}

.active, .dot:hover {
  background-color: #717171;
}

/* Fading animation */
.fade {
  -webkit-animation-name: fade;
  -webkit-animation-duration: 8.5s;
  animation-name: fade;
  animation-duration: 8.5s;
}

@-webkit-keyframes fade {
  from {opacity: .4}
  to {opacity: 1}
}

@keyframes fade {
  from {opacity: .4}
  to {opacity: 1}
}

我的JavaScript

var slideIndex = 1;
showSlides(slideIndex);

function plusSlides(n) {
  showSlides(slideIndex += n);
}

function currentSlide(n) {
  showSlides(slideIndex = n);
}

//I am trying to play the slideshow on page load
function autoPlaySlideShow() {
    showSlides(2);
}

function showSlides(n) {
  var i;
  var slides = document.getElementsByClassName("mySlides");
  var dots = document.getElementsByClassName("dot");
  if (n > slides.length) {slideIndex = 1}
  if (n < 1) {slideIndex = slides.length} ;
  for (i = 0; i < slides.length; i++) {
    slides[i].style.display = "none";
  }
  for (i = 0; i < dots.length; i++) {
    dots[i].classList.remove("active");
  }
  slides[slideIndex-1].style.display = "block";
  dots[slideIndex-1].classList.add("active");
}

我的HTML

<section class="featured">
        <div class="content-wrapper">
              <div class="slideshow-container">
              <div class="mySlides fade">
                <div class="numbertext">1 / 3</div>
                <img src="~/Images/Animation/img1.jpg" style="width:100%">
                <div class="text">Caption Text</div>
              </div>

              <div class="mySlides fade">
                <div class="numbertext">2 / 3</div>
                <img src="~/Images/Animation/img2.jpg" style="width:100%">
                <div class="text">Caption Two</div>
              </div>

              <div class="mySlides fade">
                <div class="numbertext">3 / 3</div>
                <img src="~/Images/Animation/img3.jpg" style="width:100%">
                <div class="text">Caption Three</div>
              </div>

              <a class="prev" onclick="plusSlides(-1)">&#10094;</a>
              <a class="next" onclick="plusSlides(1)">&#10095;</a>
            </div>
            <br>

            <div style="text-align:center">
              <span class="dot" onclick="currentSlide(1)"></span>
              <span class="dot" onclick="currentSlide(2)"></span>
              <span class="dot" onclick="currentSlide(3)"></span>
            </div>
        </div>
    </section>

在页面加载

<body onload="setInterval(autoPlaySlideShow(),5000)">

非常感谢任何帮助。非常感谢你。

Answer 1

希望这会有所帮助 https://jsfiddle.net/qsyLktdd/

这就是我改变的内容

function autoPlaySlideShow() {
    slideIndex = slideIndex+1;
    showSlides(slideIndex);
    //showSlides(2); old code
}

在此函数的每次间隔调用之后，您没有更新slideIndex

SlideShow未自动运行

我的CSS

我的JavaScript

我的HTML

在页面加载

1 个答案: