带字幕的Javascript图片滑块-字幕不显示

Question

I have programmed a slider that works well. 我编写了一个效果很好的滑块。 I intend to have captions, but that doesn't work. 我打算添加字幕，但这是行不通的。 What am I doing wrong? 我究竟做错了什么？ The span does show up correctly in the Firefox Developer Edition, but it doesn't show up on screen. 跨度确实在Firefox开发人员版中正确显示，但没有显示在屏幕上。 Is the CSS incorrect? CSS不正确吗？ Or does it not work like this with Javascript? 还是在Javascript中无法正常工作？ Thanks for any help! 谢谢你的帮助！ http://www.holymountstudios.com/index.php http://www.holymountstudios.com/index.php

Javascript: Javascript：

// PICTURE SLIDER ON MAIN PAGE

function mainPageSlider(imgArray, duration) {
    var curIndex = 0,
        imgDuration = duration,
        slider = document.getElementById("slider"),
        slides = slider.childNodes; 

    buildSlideShow(imgArray);
    slideShow(); 

    function buildSlideShow(arr) {
        for (i = 0; i < arr.length; i++) {
            var img = document.createElement('img');
            img.src = arr[i][0];
            var desc_span = document.createElement('span');
            var desc_spanClass = desc_span.setAttribute('class', 'img_desc');
            var desc = document.createTextNode(arr[i][1]);
            desc_span.appendChild(desc);
            img.appendChild(desc_span);
            slider.appendChild(img);
        }
    }

    function slideShow() {

        function fadeIn(e) {
            e.className = "fadeIn";
        };

        function fadeOut(e) {
            e.className = "";
        };

        fadeOut(slides[curIndex]);
        curIndex++;
        if (curIndex === slides.length) {
            curIndex = 0;
        }

        fadeIn(slides[curIndex]);

        setTimeout(slideShow, imgDuration);     
    };
}

CSS: CSS：

#slider {
    position: static;
    height: 100%;
    width: 100%;
    overflow: hidden;
}

#slider img {
    transition: opacity 2.2s;
    position: absolute;
    top:0;
    left:0;
    opacity:0;
    height: 100%;
    width: 100%;
/*    padding-top: 60px; */
    object-fit: cover;
}

#slider img.fadeIn {
    opacity:1;
}

#slider .img_desc, .img_desc {
    font-size: 50px;
    color: white;
    z-index: 5000;
    background-color: red;
    height: 500px;
    width: 90%;
    margin: 100px 0px;
    display: inline-block;
    opacity: 1;
    position: absolute;
    line-height:100px;
}

HTML: HTML：

<body onload="mainPageSlider([
    ['', 'Studio'],
    ['images/Fotos/2016-02-01_15.36.22.jpg', 'etwas anderes'],
    ], 
    2000)"> 

<span class = img_desc>Hello</span>

I have deleted one of the ref links of the img, in order to see if the caption was hidden by the img, which wasn't the case. 我删除了img的ref链接之一，以便查看字幕是否被img隐藏了，情况并非如此。 I have added a span with the same class further below, to make sure that I was doing the CSS correctly. 我在下面进一步添加了具有相同类的span，以确保我正确地执行了CSS。 The current CSS for the caption (.img_desc) is a pretty random collection of things I have tried out. 字幕（.img_desc）的当前CSS是我尝试过的东西的相当随机的集合。

Answer 1

Solution: 解：

I changed the relevant Javascript function to 我将相关的Javascript函数更改为

function buildSlideShow(arr) {
    for (i = 0; i < arr.length; i++) {
        var img_with_desc = document.createElement('div');
        var img = document.createElement('img');
        var img_with_descClass = img_with_desc.setAttribute('class', 'main_img');
        img.src = arr[i][0];
        var desc_span = document.createElement('span');
        var desc_spanClass = desc_span.setAttribute('class', 'img_desc');
        var desc = document.createTextNode(arr[i][1]);
        desc_span.appendChild(desc);
        img_with_desc.appendChild(img);
        img_with_desc.appendChild(desc_span);
        slider.appendChild(img_with_desc);
    }

and the CSS to 和CSS

#slider {
    position: static;
    height: 100%;
    width: 100%;
    overflow: hidden;
}

#slider img {
    transition: opacity 2.2s;
    position: absolute;
    top:0;
    left:0;
    opacity:0;
    height: 100%;
    width: 100%;
    z-index: 1;
/*  padding-top: 200px; */
    object-fit: cover;
}

.img_desc, #slider .fadeIn .img_desc {
    font-size: 36px;
    color: white;
    background-color: #aaa;
    z-index: 2;
    padding: 10px;
    left:100px; 
    bottom: 50px;
    left: 50%;
    width: 60%;
    margin-left: -30%;
    text-align: center;
    opacity: 0;
    position: absolute;
    object-fit: cover; 
    background: rgb(54, 25, 25); /* Fall-back for browsers that don't
                                    support rgba */
    background: rgba(54, 25, 25, .1);
}

#slider .fadeIn .img_desc {
    -webkit-animation: fadein 4s; /* Safari, Chrome and Opera > 12.1 */
       -moz-animation: fadein 4s; /* Firefox < 16 */
        -ms-animation: fadein 4s; /* Internet Explorer */
         -o-animation: fadein 4s; /* Opera < 12.1 */
            animation: fadein 4s;
}

@keyframes fadein {
    from { opacity: 0; }
    to   { opacity: 1; }
}

/* Firefox < 16 */
@-moz-keyframes fadein {
    from { opacity: 0; }
    to   { opacity: 1; }
}

/* Safari, Chrome and Opera > 12.1 */
@-webkit-keyframes fadein {
    from { opacity: 0; }
    to   { opacity: 1; }
}

/* Internet Explorer */
@-ms-keyframes fadein {
    from { opacity: 0; }
    to   { opacity: 1; }
}

/* Opera < 12.1 */
@-o-keyframes fadein {
    from { opacity: 0; }
    to   { opacity: 1; }
}

#slider .fadeIn img, #slider .fadeIn .img_desc {
    opacity:1;
}

The fade-in is just for a nicer behavior. 淡入仅用于更好的行为。

带字幕的Javascript图片滑块-字幕不显示

问题描述

1 个解决方案

解决方案1
0 2017-11-03 15:11:06

带字幕的Javascript图片滑块-字幕不显示

问题描述

1 个解决方案

解决方案1 0 2017-11-03 15:11:06

解决方案1
0 2017-11-03 15:11:06