在 Angular 中创建可扩展和可折叠的侧边栏可以显着增强应用程序的用户体验。本教程提供了构建此类侧边栏的分步指南,其中包含图标和平滑过渡。我们将涵盖从设置组件结构到应用样式和逻辑来切换侧边栏的所有内容。
可折叠侧边栏通过以下方式提高应用程序的可用性:
首先,确保您安装了 Angular CLI。如果没有,请运行:
npm install -g @angular/cli
创建一个新的 Angular 项目:
ng new angular-sidebar cd angular-sidebar
生成必要的组件:
ng generate component sidebar
这将作为应用程序的主容器。添加侧边栏和用于切换其状态的按钮:
<div> <h4> <strong>app.component.ts</strong> </h4> <p>Add the logic to manage the sidebar's state:<br> </p> <pre class="brush:php;toolbar:false">import { Component } from '@angular/core'; @Component({ selector: 'my-app', templateUrl: './app.component.html', styleUrls: ['./app.component.scss'], }) export class AppComponent { isSidebarCollapsed = false; onSidebarToggle() { this.isSidebarCollapsed = !this.isSidebarCollapsed; } }
定义侧边栏的 HTML 结构,包括带有嵌套项目的菜单:
<div> <h4> <strong>sidebar.component.ts</strong> </h4> <p>Handle the toggle logic for menu items and sidebar:<br> </p> <pre class="brush:php;toolbar:false">import { Component, EventEmitter, Input, Output } from '@angular/core'; interface MenuItem { icon: string; label: string; children?: MenuItem[]; isOpen?: boolean; } @Component({ selector: 'app-sidebar', templateUrl: './sidebar.component.html', styleUrls: ['./sidebar.component.scss'], }) export class SidebarComponent { @Input() isSidebarCollapsed = false; @Output() sidebarToggle = new EventEmitter<void>(); menuItems: MenuItem[] = [ { icon: 'fas fa-home', label: 'Dashboard', isOpen: false, children: [ { icon: 'fas fa-chart-pie', label: 'Analytics' }, { icon: 'fas fa-tasks', label: 'Projects' }, ] }, { icon: 'fas fa-cog', label: 'Settings', isOpen: false, children: [ { icon: 'fas fa-user', label: 'Profile' }, { icon: 'fas fa-lock', label: 'Security' }, ] }, { icon: 'fas fa-envelope', label: 'Messages' } ]; toggleSidebar() { this.sidebarToggle.emit(); } toggleMenuItem(item: MenuItem) { // Only toggle if sidebar is not collapsed and item has children if (!this.isSidebarCollapsed && item.children) { item.isOpen = !item.isOpen; } } }
添加布局和过渡的全局样式:
.app-container { display: flex; height: 100vh; overflow: hidden; } .content { flex-grow: 1; margin-left: 250px; transition: all 0.3s ease-in-out; background-color: #f4f6f7; overflow-y: auto; &-inner { padding: 2rem; max-width: 1200px; margin: 0 auto; } &-expanded { margin-left: 50px; } } .sidebar-toggle-btn { position: absolute; top: 1rem; left: 200px; // Default position when sidebar is expanded background-color: #2c3e50; border: none; color: #fff; padding: 0.5rem; border-top-right-radius: 0.5rem; border-bottom-right-radius: 0.5rem; cursor: pointer; z-index: 1001; box-shadow: 2px 0 5px rgba(0, 0, 0, 0.1); transition: all 0.3s ease; &:hover { background-color: #34495e; } &.sidebar-collapsed { left: 15px; // Position when sidebar is collapsed } }
定义侧边栏和菜单的样式:
.sidebar { background-color: #2c3e50; color: #ecf0f1; height: 100vh; width: 250px; position: fixed; top: 0; left: 0; z-index: 1000; transition: all 0.3s ease-in-out; overflow-x: hidden; box-shadow: 2px 0 5px rgba(0, 0, 0, 0.1); } .sidebar-header { display: flex; justify-content: center; align-items: center; padding: 1.5rem; position: relative; } .sidebar-logo { color: #fff; text-decoration: none; font-size: 1.5rem; font-weight: bold; text-align: center; } .sidebar-menu { padding: 1rem 0; ul { list-style-type: none; padding: 0; margin: 0; } } .sidebar-menu-item { position: relative; } .sidebar-item { display: flex; align-items: center; color: #ecf0f1; text-decoration: none; padding: 0.75rem 1rem; transition: all 0.2s ease; cursor: pointer; &:hover { background-color: rgba(255, 255, 255, 0.1); } &.menu-item-active { background-color: rgba(255, 255, 255, 0.2); } i { margin-right: 0.75rem; &.sidebar-item-arrow { margin-left: auto; font-size: 0.8rem; transition: transform 0.3s ease; &.rotated { transform: rotate(180deg); } } } &-text { opacity: 1; transition: opacity 0.3s ease-in-out; } &.has-children { position: relative; } } .sidebar-submenu { background-color: rgba(0, 0, 0, 0.1); .sidebar-item { padding-left: 3rem; font-size: 0.9rem; } } .sidebar-collapsed { width: 50px; .sidebar-menu-item { position: static; } .sidebar-item { i { margin-right: 0; } &-text, &-arrow { opacity: 0; width: 0; overflow: hidden; } } .sidebar-submenu { display: none; } }
启动开发服务器:
ng serve
导航到 http://localhost:4200/ 以查看正在运行的侧边栏。
修改 sidebar.component.ts 中的 menuItems 数组并提供适当的图标类。
是的,使用 Angular 的动画模块在菜单打开和关闭时添加平滑的过渡。
更新 sidebar.component.scss 中展开和折叠状态的宽度属性。
本指南涵盖了在 Angular 中创建功能性可扩展和可折叠侧边栏的所有基本步骤。您可以进一步定制设计和功能以满足您的应用需求。
以上是带图标的 Angular 可展开和可折叠侧边栏的分步指南的详细内容。更多信息请关注PHP中文网其他相关文章!