小编给大家分享一下Angular路由动画及高阶动画函数的示例分析，希望大家阅读完这篇文章之后都有所收获，下面让我们一起去探讨吧！
一、路由动画
路由动画需要在host元数据中指定触发器。动画注意不要过多，否则适得其反。
内容优先，引导用户去注意到某个内容。动画只是辅助手段。
在router.animate.ts中定义一个进场动画，一个离场动画。
因为进场动画和离场动画用的特别频繁，有一个别名叫:enter和:leave。
import { trigger, state, transition, style, animate} from '@angular/animations';export const slideToRight = trigger('routeAnim',[ state('void',style({'position':'fixed','width':'100%','height':'100%'})), state('*',style({'position':'fixed','width':'100%','height':'80%'})), transition('void => *',[ style({transform:'translateX(-100%)'}), animate('.5s ease-in-out', style({transform:'translateX(0)'})) ]), transition('* => void',[ style({transform:'translateX(0)'}), animate('.5s ease-in-out', style({transform:'translateX(100%)'})) ]),]);在project-list中使用路由动画。
import { Component, OnInit , HostBinding } from "@angular/core";import { MatDialog } from "@angular/material";import { NewProjectComponent } from "../new-project/new-project.component";import { InviteComponent } from '../invite/invite.component';import { ConfirmDialogComponent } from '../../shared/confirm-dialog/confirm-dialog.component';import {slideToRight} from '../../animate/router.animate'@Component({ selector: "app-project-list", templateUrl: "./project-list.component.html", styleUrls: ["./project-list.component.scss"], animations:[ slideToRight ]})export class ProjectListComponent implements OnInit { @HostBinding('@routeAnim') state; projects = [ { name: "企业协作平台", desc: "这是一个企业内部项目", coverImg: "assets/images/covers/0.jpg" }, { name: "自动化测试项目", desc: "这是一个企业内部项目", coverImg: "assets/images/covers/2.jpg" } ]; constructor(private dialog: MatDialog) { } ngOnInit() { } openNewProjectDialog() { // this.dialog.open(NewProjectComponent,{data:'this is a dialog'}); const dialogRef = this.dialog.open(NewProjectComponent, { data: { title: '新建项目' } }); dialogRef.afterClosed().subscribe((result) => { console.log(result); }); } lauchInviteDialog() { const dialogRef = this.dialog.open(InviteComponent); } lauchUpdateDialog() { const dialogRef = this.dialog.open(NewProjectComponent, { data: { title: '编辑项目' } }); } lauchConfimDialog() { const dialogRef = this.dialog.open(ConfirmDialogComponent, { data: { title: '编辑项目', content: '您确认删除该项目吗？' } }); }}在task-home中使用路由动画。
import { Component, OnInit , HostBinding } from "@angular/core";import { NewTaskComponent } from "../new-task/new-task.component";import { MatDialog } from "@angular/material";import { CopyTaskComponent } from "../copy-task/copy-task.component";import { ConfirmDialogComponent } from "../../shared/confirm-dialog/confirm-dialog.component";import { NewTaskListComponent } from "../new-task-list/new-task-list.component";import {slideToRight} from '../../animate/router.animate';@Component({ selector: "app-task-home", templateUrl: "./task-home.component.html", styleUrls: ["./task-home.component.scss"], animations:[ slideToRight ]})export class TaskHomeComponent implements OnInit { constructor(private dialog: MatDialog) {} @HostBinding('@routeAnim') state; ngOnInit() {} launchNewTaskDialog() { // this.dialog.open(NewTaskComponent); const dialogRef = this.dialog.open(NewTaskComponent, { data: { title: "新建任务" } }); } lauchCopyTaskDialog() { const dialogRef = this.dialog.open(CopyTaskComponent, { data: { lists: this.lists } }); } launchUpdateTaskDialog(task) { const dialogRef = this.dialog.open(NewTaskComponent, { data: { title: "修改任务", task: task } }); } launchConfirmDialog() { const dialogRef = this.dialog.open(ConfirmDialogComponent, { data: { title: "删除任务列表", content: "您确定要删除该任务列表吗？" } }); } launchEditListDialog() { const dialogRef = this.dialog.open(NewTaskListComponent, { data: { title: "更改列表名称" } }); dialogRef.afterClosed().subscribe(result => console.log(result)); } launchNewListDialog() { const dialogRef = this.dialog.open(NewTaskListComponent, { data: { title: "新建列表名称" } }); dialogRef.afterClosed().subscribe(result => console.log(result)); } lists = [ { id: 1, name: "待办", tasks: [ { id: 1, desc: "任务一： 去星巴克买咖啡", completed: true, priority: 3, owner: { id: 1, name: "张三", avatar: "avatars:svg-11" }, dueDate: new Date(), reminder: new Date() }, { id: 2, desc: "任务一： 完成老板布置的PPT作业", completed: false, priority: 2, owner: { id: 2, name: "李四", avatar: "avatars:svg-12" }, dueDate: new Date() } ] }, { id: 2, name: "进行中", tasks: [ { id: 1, desc: "任务三： 项目代码评审", completed: false, priority: 1, owner: { id: 1, name: "王五", avatar: "avatars:svg-13" }, dueDate: new Date() }, { id: 2, desc: "任务一： 制定项目计划", completed: false, priority: 2, owner: { id: 2, name: "李四", avatar: "avatars:svg-12" }, dueDate: new Date() } ] } ];}定义路由
<mat-list-item [routerLink]="['/project']"> <mat-icon mat-list-icon svgIcon="projects"></mat-icon> <h5 mat-line>项目首页</h5> <p mat-line mat-subheader> 查看您的所有项目</p> </mat-list-item> <mat-list-item [routerLink]="['/task']"> <mat-icon mat-list-icon svgIcon="projects"></mat-icon> <h5 mat-line>任务首页</h5> <p mat-line mat-subheader> 查看您的所有项目</p> </mat-list-item>注意：一定要用HostBinding形式。
二、Group
用于同时进行一组动画变换
group([animate(...),animate(...)...])接收一个数组，数组里写多个动画。
import { trigger, state, transition, style, animate, group} from '@angular/animations';export const slideToRight = trigger('routeAnim',[ state('void',style({'position':'fixed','width':'100%','height':'80%'})), state('*',style({'position':'fixed','width':'100%','height':'80%'})), transition(':enter',[ style({transform:'translateX(-100%)',opacity:'0'}), group([ animate('.5s ease-in-out', style({transform:'translateX(0)'})), animate('.3s ease-in', style({opacity:1})) ]) ]), transition(':leave',[ style({transform:'translateX(0)',opacity:'1'}), group([ animate('.5s ease-in-out', style({transform:'translateX(100%)'})), animate('.3s ease-in', style({opacity:0})) ]) ]),]);三、Query & Stagger
Query用于父节点寻找子节点，把动画应用到选中元素。非常强大。
Stagger指定有多个满足Query的元素，每个的动画之间有间隔。
做一个示例：新建的时候同时新建2个项目，两个新建出的项目的动画依次产生，第一个完成后才开始第二个。
建立list.animate.ts
进场动画，先隐藏起来，通过stagger间隔1000s做一个1s的动画。
import { trigger, state, transition, style, animate, query, animation,stagger} from '@angular/animations';export const listAnimation = trigger('listAnim', [ transition('* => *', [ query(':enter', style({opacity: 0}), { optional: true }), //加入optional为true,后面的状态动画都是可选的 query(':enter', stagger(1000, [ animate('1s', style({opacity: 1})) ]), { optional: true }), query(':leave', style({opacity: 1}), { optional: true }), query(':leave', stagger(1000, [ animate('1s', style({opacity: 0})) ]), { optional: true }) ]) ]);在project_list中使用
应用query动画一般都是跟*ngFor在一起的，需要外面套一层div。
<div class="container" [@listAnim]="projects.length"> <app-project-item *ngFor="let project of projects" [item]="project" class="card" (onInvite)="lauchInviteDialog()" (onEdit)="lauchUpdateDialog()" (onDelete)="lauchConfimDialog(project)"> </app-project-item></div><button class="ab-buttonmad-fab fab-button" mat-fab type="button" (click)="openNewProjectDialog()"> <mat-icon>add</mat-icon></button>修改对应的css
// :host{// display: flex;// flex-direction: row;// flex-wrap: wrap;// }//把host改为div.container{ display: flex; flex-direction: row; flex-wrap: wrap;}修改一下component
import { Component, OnInit , HostBinding } from "@angular/core";import { MatDialog } from "@angular/material";import { NewProjectComponent } from "../new-project/new-project.component";import { InviteComponent } from '../invite/invite.component';import { ConfirmDialogComponent } from '../../shared/confirm-dialog/confirm-dialog.component';import {slideToRight} from '../../animate/router.animate'import { listAnimation } from '../../animate/list.animate';import { projection } from '@angular/core/src/render3';@Component({ selector: "app-project-list", templateUrl: "./project-list.component.html", styleUrls: ["./project-list.component.scss"], animations:[ slideToRight,listAnimation //第一步，导入listAnimation ]})export class ProjectListComponent implements OnInit { @HostBinding('@routeAnim') state; //第二步，改造一下数组，加id projects = [ { id:1, name: "企业协作平台", desc: "这是一个企业内部项目", coverImg: "assets/images/covers/0.jpg" }, { id:2, name: "自动化测试项目", desc: "这是一个企业内部项目", coverImg: "assets/images/covers/2.jpg" } ]; constructor(private dialog: MatDialog) { } ngOnInit() { } //第三步，新增元素时hard code一下 openNewProjectDialog() { // this.dialog.open(NewProjectComponent,{data:'this is a dialog'}); const dialogRef = this.dialog.open(NewProjectComponent, { data: { title: '新建项目' } }); dialogRef.afterClosed().subscribe((result) => { console.log(result); this.projects = [...this.projects, {id:3,name:'一个新项目',desc:'这是一个新项目',coverImg:"assets/images/covers/3.jpg"}, {id:4,name:'又一个新项目',desc:'这是又一个新项目',coverImg:"assets/images/covers/4.jpg"}] }); } lauchInviteDialog() { const dialogRef = this.dialog.open(InviteComponent); } lauchUpdateDialog() { const dialogRef = this.dialog.open(NewProjectComponent, { data: { title: '编辑项目' } }); } //第四步，改造一下删除项目 lauchConfimDialog(project) { const dialogRef = this.dialog.open(ConfirmDialogComponent, { data: { title: '删除项目', content: '您确认删除该项目吗？' } }); dialogRef.afterClosed().subscribe(result=>{ console.log(result); this.projects=this.projects.filter(p=>p.id!=project.id); }); }}Stagger使得在多个元素时候，动画交错开，而不是一起。
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