javascript - 使用 fadeLoop 显示和隐藏 div 的工具提示定时教程

Question

因此，我创建了一个在线工具提示教程，并将每个工具提示设置为以 7 秒的间隔淡入和淡出。一切都运行得很好，除了当第一次打开打开交互式教程的按钮时，所有工具提示都会在屏幕上闪烁一秒钟 - 我不希望发生这种情况。关于如何消除这种情况的发生有什么想法吗？

此外，我想在一个工具提示淡出和下一个工具提示淡入之间添加 300 毫秒的重叠。如何调整代码以实现这一点？

这是我控制 fadeLoop 的 Javascript:

<script src="jquery.js"></script>
<script type="text/javascript">
    $(document).ready(function(){
    fadeLoop()
    function fadeLoop() {

        var counter = 0,
            divs = $('.fader').hide(),
            dur = 300;

        function showDiv() {
            $("div.fader").fadeOut(dur) // hide all divs
                .filter(function(index) {
                    return index == counter % divs.length;
                }) // figure out correct div to show
                .delay(dur) // delay until fadeout is finished
                .fadeIn(dur); // and show it
            counter++;
        }; // function to loop through divs and show correct div
        showDiv(); // show first div    
        return setInterval(function() {
            showDiv(); // show next div
        }, 7 * 1000); // do this every 7 seconds    
    };

    $(function() {
        var interval;

        $("#start").click(function() {
            if (interval == undefined){
                interval = fadeLoop();
                $(this).val("Stop");
            }
            else{
                clearInterval(interval);
                $(this).val("Start");
                interval = undefined;
            }
        });
    });
    });
    </script>

这是我的 HTML:

<!--#include file="header.asp"-->
<% if Request("interactive") = "on" then %>
<form name="tutorial">

<div class="fader"><div class="arrow-w arrowlocation1" style="font-size:1em;" ></div><div id="tutorial1" class="tutorial createquestion1">Start by creating a title and selecting a folder for your question to be stored in.</div></div>

<div class="fader"><div class="arrow-w arrowlocation2" style="font-size:1em;" ></div>
<div id="tutorial2" class="tutorial createquestion2">Categories are key to your reporting effectiveness, be sure to include categories that relate to this question.</div></div>

<div class="fader"><div class="arrow-w arrowlocation3" style="font-size:1em;" ></div>
<div id="tutorial3" class="tutorial createquestion3">Select your options and/or upload an attachment (file, video or audio).</div></div>

<div class="fader"><div class="quicktiptitle quicktiplocation4">QUICK TIP</div><div class="arrow-n arrowlocation4" style="font-size:1em;" ></div>
<div id="tutorial4" class="quicktip createquestion4">To create questions easier update your question preferences in your account area options.</div></div>

<div class="fader"><div class="arrow-w arrowlocation5" style="font-size:1em;" ></div>
<div id="tutorial5" class="tutorial createquestion5">Your rationale can be used to provide feedback to students on this question and you also can use internal comment to track notes on changes, updates, textbook information and more.</div></div>

<div class="fader"><div class="arrow-e arrowlocation6" style="font-size:1em;" ></div>
<div id="tutorial6" class="tutorial createquestion6">Write your questions, answers and you are ready to go.</div></div>

<div class="fader"><div class="arrow-w arrowlocation7" style="font-size:1em;" ></div>
<div class="quicktiptitle quicktiplocation7">QUICK TIP</div>
<div id="tutorial7" class="quicktip createquestion7"> Click on this icon to open and close sections that you don't use. These will remain closed whenever you visit this page until you open them again.</div></div></form>

有什么想法吗？

克里斯

Answer 1

当我在 jsFiddle 中运行它时看起来运行良好。也许在 $(document).ready() 触发之前 div 都是可见的？您可以尝试最初使用 css 隐藏 .fade div，以便在 jQuery 脚本运行之前它们不会显示。

编辑

好的，在您发表评论后，我在 jsFiddle 中对此进行了测试它似乎可以解决你的问题。基本上，我使用 CSS 隐藏 div，然后在 hide() 函数调用之前将可见性设置为 visible。

所以在 CSS 中:

.fader
{
    visibility:hidden;
}​

然后在脚本中替换:

divs = $('.fader').hide()

与:

divs = $('.fader').css('visibility','visible').hide()

然后它应该可以工作