[英]How can I add fade in, fade out effects
我有一个简单的脚本,它可以作为一个简单的 html 画廊。 但是,我需要在我的图库中添加一些过渡效果,例如淡入、淡出或类似于每部电影结尾字幕的效果(您知道我的意思)。
我该如何解决这个问题? 我想只使用 JS、HTML、CSS,而不使用外部插件。 是否可以? 现在,我只有以下内容:
<head>
<title>Test</title>
<script>
var images = [ "https://upload.wikimedia.org/wikipedia/commons/7/70/Example.png",
"https://upload.wikimedia.org/wikipedia/commons/a/a9/Example.jpg",
"https://upload.wikimedia.org/wikipedia/commons/c/ce/Example_image.png",
"https://upload.wikimedia.org/wikipedia/commons/e/ee/Example-zh.jpg",
"https://upload.wikimedia.org/wikipedia/commons/e/e2/P%C5%99%C3%ADklad.jpg",
"https://upload.wikimedia.org/wikipedia/commons/d/d6/Beispiel.png"
];
var links = [ "http://www.example1.com",
"http://www.example2.com",
"http://www.example3.com",
"http://www.example4.com",
"http://www.example5.com",
"http://www.example6.com",
];
var i = 0;
var renew = setInterval(function(){
if(i==images.length) i=0;
document.getElementById("img1").src = images[i];
document.getElementById("link1").href = links[i];
if(i+1==images.length) i=-1;
document.getElementById("img2").src = images[i+1];
document.getElementById("link2").href = links[i+1];
if(i+2==images.length) i=-2;
document.getElementById("img3").src = images[i+2];
document.getElementById("link3").href = links[i+2];
i+=3;
},5000);
</script>
</head>
<body>
<div align="center">
<a href="http://www.example1.com" id="link1"><img src="https://upload.wikimedia.org/wikipedia/commons/7/70/Example.png" id='img1' > </a> </br></br>
<a href="http://www.example2.com" id="link2"><img src="https://upload.wikimedia.org/wikipedia/commons/a/a9/Example.jpg" id='img2' > </a> </br></br>
<a href="http://www.example3.com" id="link3"><img src="https://upload.wikimedia.org/wikipedia/commons/c/ce/Example_image.png" id='img3' > </a> </br>
</div>
</body>
我刚刚创建了一个JQuery函数并将其添加到您的脚本中。 现在,当您单击该按钮时,它将按照说明执行。 这只是一个例子
<html>
<head>
<title>Test</title>
<script>
var images = [ "https://upload.wikimedia.org/wikipedia/commons/7/70/Example.png",
"https://upload.wikimedia.org/wikipedia/commons/a/a9/Example.jpg",
"https://upload.wikimedia.org/wikipedia/commons/c/ce/Example_image.png",
"https://upload.wikimedia.org/wikipedia/commons/e/ee/Example-zh.jpg",
"https://upload.wikimedia.org/wikipedia/commons/e/e2/P%C5%99%C3%ADklad.jpg",
"https://upload.wikimedia.org/wikipedia/commons/d/d6/Beispiel.png"
];
var links = [ "http://www.example1.com",
"http://www.example2.com",
"http://www.example3.com",
"http://www.example4.com",
"http://www.example5.com",
"http://www.example6.com",
];
var i = 0;
var renew = setInterval(function(){
if(i==images.length) i=0;
document.getElementById("img1").src = images[i];
document.getElementById("link1").href = links[i];
if(i+1==images.length) i=-1;
document.getElementById("img2").src = images[i+1];
document.getElementById("link2").href = links[i+1];
if(i+2==images.length) i=-2;
document.getElementById("img3").src = images[i+2];
document.getElementById("link3").href = links[i+2];
i+=3;
},5000);
</script>
<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.12.2/jquery.min.js"></script>
<script type='text/javascript'>
$(document).ready(function(){
$(".btn1").click(function(){
$("#link1").fadeOut()
});
$(".btn2").click(function(){
$("#link1").fadeIn();
});
});
</script>
</head>
<body>
</script>
</head>
<body>
<div align="center">
<button class="btn1">Fade out</button>
<button class="btn2">Fade in</button>
<a href="http://www.example1.com" id="link1"><img src="https://upload.wikimedia.org/wikipedia/commons/7/70/Example.png" id='img1' > </a> </br></br>
<a href="http://www.example2.com" id="link2"><img src="https://upload.wikimedia.org/wikipedia/commons/a/a9/Example.jpg" id='img2' > </a> </br></br>
<a href="http://www.example3.com" id="link3"><img src="https://upload.wikimedia.org/wikipedia/commons/c/ce/Example_image.png" id='img3' > </a> </br>
</div>
</body>
</html>
在<head>
标记内添加此样式 -
<style>
img {
position: relative;
-webkit-animation: animateleft 4.9s;
animation: animateleft 4.9s;
animation-iteration-count:infinite;
}
@-webkit-keyframes animateleft {
from {
left: -300px;
opacity: 0
}
to {
left: 300px;
opacity: 1
}
}
@keyframes animateleft {
from {
left: -300px;
opacity: 0
}
to {
left: 300px;
opacity: 1
}
}
</style>
如果您不想要移动动画但只是淡入淡出,请from
所有定义中删除left
标记, from
仅opacity:0
to
1进行淡入。对于淡出, from
opacity:1
to
0。
希望这可以帮助。
你绝对可以通过CSS实现一些效果。 但并非所有(如jQuery-ui的盲人)
大多数影响包括改变:
opacity: [0-1]
display: relative; left: [X]px; top: [Y]px
display: relative; left: [X]px; top: [Y]px
或transform: translate([X]px,[Y]px)
overflow: hidden
要么CSS:
#img {
animation: fade-in 2s infinite;
}
@keyframe fade-in {
from {
left: -200px
}
to {
left: 0
}
}`
或JavaScript:
var img = document.getElementById('img');
for(i = 1; i <= 100; i++){
(function(step) {
setTimeout(function() {
img.style.transform = "translate(-"+(200-step*2)+"px, 0)";
}, step * 20);
})(i);
}
为了实现像盲目的东西,你必须向左移动图像容器<div>,同时以相同的速度向右移动图像。
在这里,我实现了8种纯JavaScript效果(包括盲,带说明)
- 淡入 http://codepen.io/warkentien2/pen/pboVXR
- 淡出 http://codepen.io/warkentien2/pen/EyxpVq
你可以尝试这个。 我根本没有改变你的代码。
HTML
<div align="center">
<a href="http://www.example1.com" id="link1">
<img src="https://upload.wikimedia.org/wikipedia/commons/7/70/Example.png" id='img1' >
</a>
</br>
</br>
<a href="http://www.example2.com" id="link2">
<img src="https://upload.wikimedia.org/wikipedia/commons/a/a9/Example.jpg" id='img2' >
</a>
<br>
<br>
<a href="http://www.example3.com" id="link3">
<img src="https://upload.wikimedia.org/wikipedia/commons/c/ce/Example_image.png" id='img3'>
</a>
<br>
</div>
CSS
<style>
.animate{transition:all 1s ease; opacity:0;}
</style>
JS
<script>
var images = [ "https://upload.wikimedia.org/wikipedia/commons/7/70/Example.png",
"https://upload.wikimedia.org/wikipedia/commons/a/a9/Example.jpg",
"https://upload.wikimedia.org/wikipedia/commons/c/ce/Example_image.png",
"https://upload.wikimedia.org/wikipedia/commons/e/ee/Example-zh.jpg",
"https://upload.wikimedia.org/wikipedia/commons/e/e2/P%C5%99%C3%ADklad.jpg",
"https://upload.wikimedia.org/wikipedia/commons/d/d6/Beispiel.png"
];
var links = [ "http://www.example1.com",
"http://www.example2.com",
"http://www.example3.com",
"http://www.example4.com",
"http://www.example5.com",
"http://www.example6.com",
];
var i = 0;
var renew = setInterval(function(){
if(i==images.length) i=0;
document.getElementById("img1").src = images[i];
document.getElementById("link1").href = links[i];
document.getElementById('link1').style.opacity = 0;
setTimeout(function(){
document.getElementById('link1').setAttribute("class", "animate");
document.getElementsByClassName('animate')[0].style.opacity = 1;
setTimeout(function(){document.getElementById('link1').removeAttribute("class", "animate")},500)
},500)
if(i+1==images.length) i=-1;
document.getElementById("img2").src = images[i+1];
document.getElementById("link2").href = links[i+1];
document.getElementById('link2').style.opacity = 0;
setTimeout(function(){
document.getElementById('link2').setAttribute("class", "animate");
document.getElementsByClassName('animate')[1].style.opacity = 1;
setTimeout(function(){document.getElementById('link2').removeAttribute("class", "animate")},500)
},500)
if(i+2==images.length) i=-2;
document.getElementById("img3").src = images[i+2];
document.getElementById("link3").href = links[i+2];
document.getElementById('link3').style.opacity = 0;
setTimeout(function(){
document.getElementById('link3').setAttribute("class", "animate");
document.getElementsByClassName('animate')[2].style.opacity = 1;
setTimeout(function(){document.getElementById('link3').removeAttribute("class", "animate")},500)
},500)
i+=3;
},5000);
</script>
点击此处查看实时示例 - https://jsfiddle.net/Rit_Design/9mkvffnk/1/
请记住,代码可以更加智能。
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