Angular Konva 简单动画教程
Konva 提供了两个主要的动画工具:node.to() 用于简单过渡,Konva.Animation 用于逐帧更新。
此示例直接使用 Konva.Animation 在视图初始化后以正弦波方式移动圆形。
说明:演示使红色圆形持续左右移动。
简单动画示例
import { Component, ViewChild, OnInit, OnDestroy } from '@angular/core'; import { StageConfig } from 'konva/lib/Stage'; import { CircleConfig } from 'konva/lib/shapes/Circle'; import Konva from 'konva'; import { CoreShapeComponent, StageComponent, } from 'ng2-konva'; @Component({ selector: 'app-root', standalone: true, template: ` <ko-stage [config]="configStage"> <ko-layer> <ko-circle #circle [config]="configCircle"></ko-circle> </ko-layer> </ko-stage> `, imports: [StageComponent, CoreShapeComponent], }) export default class App implements OnInit, OnDestroy { @ViewChild('circle') circle!: any; private animation: any = null; public configStage: StageConfig = { width: window.innerWidth, height: window.innerHeight, }; public configCircle: CircleConfig = { x: 100, y: 100, radius: 50, fill: 'red', stroke: 'black', strokeWidth: 4 }; ngAfterViewInit() { const circle = this.circle.getNode(); this.animation = new Konva.Animation((frame: any) => { const time = frame.time; const x = 100 + Math.sin(time / 1000) * 100; circle.x(x); }, circle.getLayer()); this.animation.start(); } ngOnDestroy() { if (this.animation) { this.animation.stop(); } } }