Skip to main content

Angular Konva 缓存教程

缓存会将节点光栅化为内部图像,这可以提高性能,并且是某些效果(例如滤镜)所必需的。

本示例在渲染后访问底层的 Konva 节点并手动调用 cache()

说明:演示展示了一个带有阴影样式的矩形,该矩形在视图初始化后被缓存。

了解更多详情,请参阅 Node API 参考cache() 文档

缓存示例

import { Component, ViewChild, AfterViewInit } from '@angular/core';
import { StageConfig } from 'konva/lib/Stage';
import { RectConfig } from 'konva/lib/shapes/Rect';

import {
CoreShapeComponent,
StageComponent,
} from 'ng2-konva';

@Component({
selector: 'app-root',
standalone: true,
template: `
<ko-stage [config]="configStage">
<ko-layer>
<ko-rect #rect [config]="configRect"></ko-rect>
</ko-layer>
</ko-stage>
`,
imports: [StageComponent, CoreShapeComponent],
})
export default class App implements AfterViewInit {
@ViewChild('rect') rect!: any;

public configStage: StageConfig = {
width: window.innerWidth,
height: window.innerHeight,
};
public configRect: RectConfig = {
x: 50,
y: 50,
width: 100,
height: 100,
fill: 'red',
shadowBlur: 10,
shadowColor: 'black',
shadowOffsetX: 5,
shadowOffsetY: 5
};

ngAfterViewInit() {
if (this.rect) {
this.rect.getNode().cache();
}
}
}