我正在尝试从头开始以角度实现图像滑块，并尝试复制基于 w3school 的图像滑块。
下面我尝试用 Angular 实现，有人可以指导我如何使用 Angular 实现吗？
在这里您可以找到stackblitz链接
组件.html
<div class="slideshow-container" #myDiv>
<div class="mySlides fade">
<div class="numbertext">1 / 3</div>
<img src="https://img.adaptivereso.com/https://stellarmls-propertyresi.s3.us-west-002.backblazeb2.com/314a10f7-07d4-4d9e-b8ea-be44be55ab35.jpeg/?rwidth=300&rheight=200&type=jpg" style="width:100%">
<div class="text">Caption Text</div>
</div>
<div class="mySlides fade" >
<div class="numbertext">2 / 3</div>
<img src="https://img.adaptivereso.com/https://stellarmls-propertyresi.s3.us-west-002.backblazeb2.com/cd7c5e85-d528-4d10-a635-ace77aaef77d.jpeg/?rwidth=300&rheight=200&type=jpg" style="width:100%">
<div class="text">Caption Two</div>
</div>
<div class="mySlides fade">
<div class="numbertext">3 / 3</div>
<img src="https://img.adaptivereso.com/https://stellarmls-propertyresi.s3.us-west-002.backblazeb2.com/314a10f7-07d4-4d9e-b8ea-be44be55ab35.jpeg/?rwidth=300&rheight=200&type=jpg" style="width:100%">
<div class="text">Caption Three</div>
</div>
<a class="prev" (click)="plusSlides(-1)">❮</a>
<a class="next" (click)="plusSlides(1)">❯</a>
</div>
<br>
<div style="text-align:center">
<span class="dot" (click)="currentSlide(1)"></span>
<span class="dot" (click)="currentSlide(2)"></span>
<span class="dot" (click)="currentSlide(3)"></span>
</div>
组件.ts
import { Component, OnInit, ViewChild, ElementRef, ViewChildren, QueryList } from '@angular/core';
@Component({
selector: 'app-custom-gallery',
templateUrl: './custom-gallery.component.html',
styleUrls: ['./custom-gallery.component.css']
})
export class CustomGalleryComponent implements OnInit {
slideIndex:number = 1;
constructor (public elementRef: ElementRef) { }
ngOnInit(): void {
this.showSlides(this.slideIndex);
}
plusSlides(n) {
this.showSlides(this.slideIndex += n);
}
currentSlide(n) {
console.log(n)
this.showSlides(this.slideIndex = n);
}
showSlides(n) {
var i;
var slides = document.getElementsByClassName("mySlides");
var dots = document.getElementsByClassName("dot");
if (n > slides.length) {this.slideIndex = 1}
if (n < 1) {this.slideIndex = slides.length}
for (i = 0; i < slides.length; i++) {
console.log(typeof slides[i]);
// slides[i].style.display = "none";
}
for (i = 0; i < dots.length; i++) {
dots[i].className = dots[i].className.replace(" active", "");
}
// slides[this.slideIndex-1].style.display = "block";
dots[this.slideIndex-1].className += " active";
}
}
组件.css
* {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;
user-select: none;
}
/* 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}
}
您可以使用以下方法：
创建一个
ImageSliderimagesexport class ImageSliderComponent {
@Input() images: string[];
slideIndex: number = 0;
changeSlide(n: number) {
this.slideIndex += n;
}
}
在模板中，仅显示活动幻灯片（请参阅
imgsrc<div class="slideshow-container" #myDiv>
<div class="mySlides fade">
<div class="numbertext">{{ slideIndex + 1}} / {{ images.length }}</div>
<img
[src]="images[slideIndex]"
style="width:100%"
/>
<div class="text">Caption Text</div>
</div>
<a class="prev" (click)="changeSlide(-1)">❮</a>
<a class="next" (click)="changeSlide(1)">❯</a>
</div>
使用您的组件，例如：
<app-image-slider [images]="[
'http://images.com/image1.jpg',
'http://images.com/image1.jpg',
'http://images.com/image3.jpg']"></app-image-slider>
Stackblitz：https://stackblitz.com/edit/angular-ivy-x9nk16?file=src%2Fapp%2Fimage-slider.component.ts
注：
ElementRefgetElementsByClassName您可以使用以下方法：
创建一个 ImageSlider 组件，该组件将图像列表作为输入，并跟踪当前幻灯片
export class ImageSliderComponent {
@Input() images: string[];
slideIndex: number = 0;
changeSlide(n: number) {
this.slideIndex += n;
}
}
In the template, display only the active slide (refer to the img src binding):
<div class="slideshow-container" #myDiv>
<div class="mySlides fade">
<div class="numbertext">{{ slideIndex + 1}} / {{ images.length }}</div>
<img
[src]="images[slideIndex]"
style="width:100%"
/>
<div class="text">Caption Text</div>
</div>
<a class="prev" (click)="changeSlide(-1)">❮</a>
<a class="next" (click)="changeSlide(1)">❯</a>
</div>
使用您的组件，例如：
<app-image-slider [images]="[
'http://images.com/image1.jpg',
'http://images.com/image1.jpg',
'http://images.com/image3.jpg']"></app-image-slider>
https://stackblitz.com/edit/angular-ivy-xppajp?file=src%2Fapp%2Fimage-slider.component.ts