引导轮播（自动滑动不起作用）

Question

希望你有一个美好的一天！每次运行时我都会遇到问题，它只显示第一张幻灯片几秒钟，然后完全消失，当我在幻灯片消失之前使用侧箭头或按钮时，它可以正常工作。

HTML

<header>
        <div class="row row-content">
            <div class="col">
                <div id="mycarousel" class="carousel slide" data-ride="carousel">
                    <div class="carousel-inner" role="listbox">
                        
                        <div class="carousel-item active">
                            <img src="img/img1.png" class="d-block img-fluid">
                            <div class="carousel-caption d-none d-md-block" alt="img1">
                                <h2>text</h2>
                                <p class="d-none d-sm-block">text</p>
                            </div>
                        </div>

                        <div class="carousel-item">
                            <img src="img/img2.png" class="d-block img-fluid">
                            <div class="carousel-caption d-none d-md-block" alt="img2">
                                <h2>text</h2>
                                <p class="d-none d-sm-block">text</p>
                            </div>
                        </div>

                        <div class="carousel-item">
                            <img src="img/img3.png" class="d-block img-fluid">
                            <div class="carousel-caption d-none d-md-block" alt="img3">
                                <h2>text</h2>
                                <p class="d-none d-sm-block">text</p>
                            </div>
                        </div>
                       
                        
                    </div>
                    <ol class="carousel-indicators">
                        <li data-target="#mycarousel"data-slide-to="0" class="active"></li>
                        <li data-target="#mycarousel"data-slide-to="1" class="active"></li>
                        <li data-target="#mycarousel"data-slide-to="2" class="active"></li>
                    </ol>
                    <a  class="carousel-control-prev" href="#mycarousel" role="button" data-slide="prev">
                        <span class="carousel-control-prev-icon"></span>
                    </a>
                    <a  class="carousel-control-next" href="#mycarousel" role="button" data-slide="next">
                        <span class="carousel-control-next-icon"></span>
                    </a>
                </div>
            </div>
        </div>
    </header>

CSS

.carousel-item {
  height: 420px;
}
.carousel-item img {
  position: absolute;
  top: 0;
  left: 0;
  min-height: 420px;
}

Answer 1

我已经做了这个例子并且运行良好。你插入了js库吗？因为你的代码没问题。

.carousel-item {
  height: 420px;
}
.carousel-item img {
  position: absolute;
  top: 0;
  left: 0;
  min-height: 420px;
}

<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
    <link href="https://stackpath.bootstrapcdn.com/bootstrap/4.4.1/css/bootstrap.min.css" rel="stylesheet"/>

    <header>
            <div class="row row-content">
                <div class="col">
                    <div id="mycarousel" class="carousel slide" data-ride="carousel">
                        <div class="carousel-inner" role="listbox">
                            
                            <div class="carousel-item active">
                                <img src="https://www.lupadigital.info/wp-content/uploads/2018/05/imagens-gratis.jpg" class="d-block img-fluid">
                                <div class="carousel-caption d-none d-md-block" alt="img1">
                                    <h2>text</h2>
                                    <p class="d-none d-sm-block">text</p>
                                </div>
                            </div>

                            <div class="carousel-item">
                                <img src="https://www.lupadigital.info/wp-content/uploads/2018/05/imagens-gratis.jpg" class="d-block img-fluid">
                                <div class="carousel-caption d-none d-md-block" alt="img2">
                                    <h2>text</h2>
                                    <p class="d-none d-sm-block">text</p>
                                </div>
                            </div>

                            <div class="carousel-item">
                                <img src="https://www.lupadigital.info/wp-content/uploads/2018/05/imagens-gratis.jpg" class="d-block img-fluid">
                                <div class="carousel-caption d-none d-md-block" alt="img3">
                                    <h2>text</h2>
                                    <p class="d-none d-sm-block">text</p>
                                </div>
                            </div>
                           
                            
                        </div>
                        <ol class="carousel-indicators">
                            <li data-target="#mycarousel"data-slide-to="0" class="active"></li>
                            <li data-target="#mycarousel"data-slide-to="1" class=""></li>
                            <li data-target="#mycarousel"data-slide-to="2" class=""></li>
                        </ol>
                        <a  class="carousel-control-prev" href="#mycarousel" role="button" data-slide="prev">
                            <span class="carousel-control-prev-icon"></span>
                        </a>
                        <a  class="carousel-control-next" href="#mycarousel" role="button" data-slide="next">
                            <span class="carousel-control-next-icon"></span>
                        </a>
                    </div>
                </div>
            </div>
        </header>
        
        <script src="https://stackpath.bootstrapcdn.com/bootstrap/4.4.1/js/bootstrap.min.js"></script>