1. 準(zhǔn)備圖片屎开，最好是寬高一樣的。設(shè)置圖片的寬度
<!DOCTYPE html>
<html>
<head>
<script src="http://code.jquery.com/jquery-2.1.1.min.js"></script>
<meta charset="utf-8">
<title>JS Bin</title>
</head>
<body>
<div class="images">
<img src="https://i.loli.net/2018/10/13/5bc1604f2a255.jpg" width=480 alt="">
<img src="https://i.loli.net/2018/10/13/5bc1604f3b560.jpg" width=480 alt="">
<img src="https://i.loli.net/2018/10/13/5bc1604f83051.jpg" width=480 alt="">
<img src="https://i.loli.net/2018/10/13/5bc1604f836b9.jpg" width=480 alt="">
</div>
</body>
</html>
2. 設(shè)置一個(gè)窗口马靠；讓圖片橫向顯示奄抽；設(shè)置邊框，然后觀察
<div class="window">
<div class="images">
<img src="https://i.loli.net/2018/10/13/5bc1604f2a255.jpg" width=480 alt="">
<img src="https://i.loli.net/2018/10/13/5bc1604f3b560.jpg" width=480 alt="">
<img src="https://i.loli.net/2018/10/13/5bc1604f836b9.jpg" width=480 alt="">
<img src="https://i.loli.net/2018/10/13/5bc1604f83051.jpg" width=480 alt="">
</div>
</div>
<style>
.images{
display: flex;
align-items: flex-start;/*交叉軸的起點(diǎn)對(duì)齊*/
}
.window{
border: 3px solid green;
}
</style>
圖片超出了綠色邊框的寬度甩鳄，綠色邊框的寬度是和頁(yè)面寬度相同逞度。
3. 設(shè)置窗口的寬高，和第一個(gè)圖片寬高相同妙啃，然后設(shè)置 overflow: hidden 档泽；
<style>
.images{
display: flex;
align-items: flex-start;
}
.window{
border: 3px solid green;
width: 480px;
height: 320px;
overflow: hidden;
}
此時(shí)顯示的只有第一張圖片，只需要改變images 的水平位置揖赴，就可以看到其他圖片：
<div class="window">
<div class="images" style="transform: translateX(-480px)">
<img src="https://i.loli.net/2018/10/13/5bc1604f2a255.jpg" width=480 alt="">
<img src="https://i.loli.net/2018/10/13/5bc1604f3b560.jpg" width=480 alt="">
<img src="https://i.loli.net/2018/10/13/5bc1604f836b9.jpg" width=480 alt="">
<img src="https://i.loli.net/2018/10/13/5bc1604f83051.jpg" width=480 alt="">
</div>
</div>
4. 添加 button 馆匿，通過(guò) js 控制使點(diǎn)擊顯示相應(yīng)圖片，初步實(shí)現(xiàn)輪播
<div class="window">
<div class="images" id="images">
<img src="https://i.loli.net/2018/10/13/5bc1604f2a255.jpg" width=480 alt="">
<img src="https://i.loli.net/2018/10/13/5bc1604f3b560.jpg" width=480 alt="">
<img src="https://i.loli.net/2018/10/13/5bc1604f836b9.jpg" width=480 alt="">
<img src="https://i.loli.net/2018/10/13/5bc1604f83051.jpg" width=480 alt="">
</div>
</div>
<button id="p1">第1張</button>
<button id="p2">第2張</button>
<button id="p3">第3張</button>
<button id="p4">第4張</button>
<style>
.images{
display: flex;
align-items: flex-start;
transition: transform 0.5s;
}
.window{
width: 480px;
height: 320px;
overflow: hidden;
}
</style>
$(p1).on('click',function(){
$(images).css({
transform: 'translateX(0)'})
})
$(p2).on('click',function(){
$(images).css({
transform: 'translateX(-480px)'
})
})
$(p3).on('click',function(){
$(images).css({
transform: 'translateX(-960px)'
})
})
$(p4).on('click',function(){
$(images).css({
transform: 'translateX(-1440px)'
})
})
5. 調(diào)整代碼燥滑，可以支持更多張圖片輪播
<div class="window">
<div class="images" id="images">
<img src="https://i.loli.net/2018/10/13/5bc1604f2a255.jpg" width=480 alt="">
<img src="https://i.loli.net/2018/10/13/5bc1604f3b560.jpg" width=480 alt="">
<img src="https://i.loli.net/2018/10/13/5bc1604f836b9.jpg" width=480 alt="">
<img src="https://i.loli.net/2018/10/13/5bc1604f83051.jpg" width=480 alt="">
</div>
</div>
<span id="buttons">
<span>第1張</span>
<span>第2張</span>
<span>第3張</span>
<span>第4張</span>
</span>
var allButtons = $('#buttons > span')
for( let i=0; i<allButtons.length; i++){
$(allButtons[i]).on('click',function(x){
var index = $(x.currentTarget).index()
//index()可以得到當(dāng)前元素在父元素下所有子元素中排在第幾個(gè)渐北，并返回這個(gè)值
var n = index*-480
$('#images').css({
transform: 'translateX('+ n + 'px)'
})
})
}
6. 實(shí)現(xiàn)輪播自動(dòng)播放
var allButtons = $('#buttons > span')
for( let i=0; i<allButtons.length; i++){
$(allButtons[i]).on('click',function(x){
var index = $(x.currentTarget).index()
var n = index*-480
$('#images').css({
transform: 'translateX('+ n + 'px)'
})
})
}
var a = 0
var size = allButtons.length
allButtons.eq(a%size).trigger('click')
//eq()找出對(duì)應(yīng)的dom，封裝成對(duì)應(yīng)的 jQuery铭拧；trigger用于觸發(fā)事件
setInterval(()=>{
a += 1
allButtons.eq(a%size).trigger('click')
},1000) // 實(shí)現(xiàn)自動(dòng)輪播
7. 文字高亮
.red{
color: red;
}
var a = 0
var size = allButtons.length
allButtons.eq(a%size).trigger('click')
.addClass('red')
.siblings('.red').removeClass('red')
setInterval(()=>{
a += 1
allButtons.eq(a%size).trigger('click')
.addClass('red')
.siblings('.red').removeClass('red')
},1000) // 實(shí)現(xiàn)自動(dòng)輪播赃蛛；添加和刪除class實(shí)現(xiàn)相應(yīng)文字的高亮
8. 鼠標(biāo)移入圖片時(shí)自動(dòng)輪播停止，移開(kāi)時(shí)恢復(fù)自動(dòng)輪播
var a = 0
var size = allButtons.length
allButtons.eq(a%size).trigger('click')
.addClass('red')
.siblings('.red').removeClass('red')
var timerId = setInterval(()=>{
a += 1
allButtons.eq(a%size).trigger('click')
.addClass('red')
.siblings('.red').removeClass('red')
},1000)
$('.window').on('mouseenter',function(){
window.clearInterval(timerId)
})
$('.window').on('mouseleave',function(){
timerId = setInterval(()=>{
a += 1
allButtons.eq(a%size).trigger('click')
.addClass('red')
.siblings('.red').removeClass('red')
},1000)
})
9. 點(diǎn)擊文字時(shí)文字高亮
var allButtons = $('#buttons > span')
for( let i=0; i<allButtons.length; i++){
$(allButtons[i]).on('click',function(x){
var index = $(x.currentTarget).index()
var n = index*-480
$('#images').css({
transform: 'translateX('+ n + 'px)'
})
a = index
allButtons.eq(a)
.addClass('red')
.siblings('.red').removeClass('red')
})
}
var a = 0
var size = allButtons.length
allButtons.eq(a%size).trigger('click')
.addClass('red')
.siblings('.red').removeClass('red')
var timerId = setInterval(()=>{
a += 1
allButtons.eq(a%size).trigger('click')
.addClass('red')
.siblings('.red').removeClass('red')
},3000)
$('.window').on('mouseenter',function(){
window.clearInterval(timerId)
})
$('.window').on('mouseleave',function(){
timerId = setInterval(()=>{
a += 1
allButtons.eq(a%size).trigger('click')
.addClass('red')
.siblings('.red').removeClass('red')
},3000)
})
10. 簡(jiǎn)化代碼
var allButtons = $('#buttons > span')
for( let i=0; i<allButtons.length; i++){
$(allButtons[i]).on('click',function(x){
var index = $(x.currentTarget).index()
var n = index*-480
$('#images').css({
transform: 'translateX('+ n + 'px)'
})
a = index
activeButtons(allButtons.eq(a))
})
}
var a = 0
var size = allButtons.length
playSlide(a%size)
var timerId = setTimer()
function playSlide(index){
allButtons.eq(index).trigger('click')
}
function setTimer(){
return setInterval(()=>{
a += 1
playSlide(a%size)
},3000)
}
function activeButtons($buttons){
$buttons.addClass('red')
.siblings('.red').removeClass('red')
}
$('.window').on('mouseenter',function(){
window.clearInterval(timerId)
})
$('.window').on('mouseleave',function(){
timerId = setTimer()
})
