我试图用简单的JavaScript代码在AngularJS中添加轮播，但是它w3school.com只能与JavaScript一起正常使用，但是当我在AngularJS中实现时却无法正常工作。
我不想将任何库用于轮播。
下面的代码可以正常工作 w3school.com
https://www.w3schools.com/howto/tryit.asp?filename=tryhow_js_slideshow
但是当我在AngularJS中实现此功能后，它就无法工作了。我正在获得slide.length价值0。
以下是AngularJS代码：-
$scope.showCarousel = function(n) {
var i;
var slides = document.getElementsByClassName("mySlides");
console.log(slides);
var dots = document.getElementsByClassName("dot");
if (n > slides.length) {
slideIndex = 1
}
if (n < 1) {
slideIndex = slides.length
}
console.log(slides.length);
for (i = 0; i < slides.length; i++) {
slides[i].style.display = "none";
console.log(slides[i].style);
}
for (i = 0; i < dots.length; i++) {
dots[i].className = dots[i].className.replace(" active", "");
}
// $scope.style1 = {'display': 'block'};
slides[$scope.slideIndex - 1].style.display = "block";
dots[$scope.slideIndex - 1].className += " active";
}
尝试一次，我已经更改了w3c学校的代码，并尝试使用angular
<!DOCTYPE html>
<html ng-app="myApp">
<head>
<script src="https://ajax.googleapis.com/ajax/libs/angularjs/1.6.9/angular.min.js"></script>
<meta name="viewport" content="width=device-width, initial-scale=1">
<style>
* {box-sizing: border-box}
body {font-family: Verdana, sans-serif; margin:0}
.mySlides {display: none}
img {vertical-align: middle;}
/* Slideshow container */
.slideshow-container {
max-width: 1000px;
position: relative;
margin: auto;
}
/* Next & previous buttons */
.prev, .next {
cursor: pointer;
position: absolute;
top: 50%;
width: auto;
padding: 16px;
margin-top: -22px;
color: white;
font-weight: bold;
font-size: 18px;
transition: 0.6s ease;
border-radius: 0 3px 3px 0;
}
/* Position the "next button" to the right */
.next {
right: 0;
border-radius: 3px 0 0 3px;
}
/* On hover, add a black background color with a little bit see-through */
.prev:hover, .next:hover {
background-color: rgba(0,0,0,0.8);
}
/* Caption text */
.text {
color: #f2f2f2;
font-size: 15px;
padding: 8px 12px;
position: absolute;
bottom: 8px;
width: 100%;
text-align: center;
}
/* Number text (1/3 etc) */
.numbertext {
color: #f2f2f2;
font-size: 12px;
padding: 8px 12px;
position: absolute;
top: 0;
}
/* The dots/bullets/indicators */
.dot {
cursor: pointer;
height: 15px;
width: 15px;
margin: 0 2px;
background-color: #bbb;
border-radius: 50%;
display: inline-block;
transition: background-color 0.6s ease;
}
.active, .dot:hover {
background-color: #717171;
}
/* Fading animation */
.fade {
-webkit-animation-name: fade;
-webkit-animation-duration: 1.5s;
animation-name: fade;
animation-duration: 1.5s;
}
@-webkit-keyframes fade {
from {opacity: .4}
to {opacity: 1}
}
@keyframes fade {
from {opacity: .4}
to {opacity: 1}
}
/* On smaller screens, decrease text size */
@media only screen and (max-width: 300px) {
.prev, .next,.text {font-size: 11px}
}
</style>
</head>
<body ng-controller="myCtrl">
<div class="slideshow-container">
<div class="mySlides fade">
<div class="numbertext">1 / 3</div>
<img src="img_nature_wide.jpg" style="width:100%">
<div class="text">Caption Text</div>
</div>
<div class="mySlides fade">
<div class="numbertext">2 / 3</div>
<img src="img_snow_wide.jpg" style="width:100%">
<div class="text">Caption Two</div>
</div>
<div class="mySlides fade">
<div class="numbertext">3 / 3</div>
<img src="img_mountains_wide.jpg" style="width:100%">
<div class="text">Caption Three</div>
</div>
<a class="prev" ng-click="plusSlides(-1)">❮</a>
<a class="next" ng-click="plusSlides(1)">❯</a>
</div>
<br>
<div style="text-align:center">
<span class="dot" ng-click="currentSlide(1)"></span>
<span class="dot" ng-click="currentSlide(2)"></span>
<span class="dot" ng-click="currentSlide(3)"></span>
</div>
<script>
var app=angular.module('myApp',[]);
app.controller('myCtrl',function($scope){
$scope.showSlides=function(n) {
var i;
var slides = document.getElementsByClassName("mySlides");
var dots = document.getElementsByClassName("dot");
if (n > slides.length) {slideIndex = 1}
if (n < 1) {slideIndex = slides.length}
for (i = 0; i < slides.length; i++) {
slides[i].style.display = "none";
}
for (i = 0; i < dots.length; i++) {
dots[i].className = dots[i].className.replace(" active", "");
}
slides[slideIndex-1].style.display = "block";
dots[slideIndex-1].className += " active";
}
var slideIndex = 1;
$scope.showSlides(slideIndex);
$scope.plusSlides=function(n){
$scope.showSlides(slideIndex += n);
}
$scope.currentSlide=function(n){
$scope.showSlides(slideIndex = n);
}
});
</script>
</body>
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