地图警告信息优化：Canvas2D: Multiple readback operations using getImageData are faster with the willReadFrequ

地图警告信息优化：Canvas2D: Multiple readback operations using getImageData are faster with the willReadFrequently attribute set to true.

• 法一：
• 法二：使用辅助函数（推荐）

两种方法，测试了都可使用。

法一：

在main.ts中加入：

// 地图警告信息优化：maps?callback=___onA…Eye,AMap.Geocoder:1 Canvas2D: Multiple readback operations using getImageData are faster with the willReadFrequently attribute set to true.const originalGetContext = HTMLCanvasElement.prototype.getContext;// 使用正确的类型声明重写 getContextHTMLCanvasElement.prototype.getContext = function <T extends RenderingContext | null>( contextId: string, options?: any): T { if (contextId === \"2d\") { // 处理 2D 上下文 const context = originalGetContext.call(this, contextId, { willReadFrequently: true, ...(options || {}), }) as CanvasRenderingContext2D | null; return context as T; } // 处理其他上下文类型 return originalGetContext.call(this, contextId, options) as T;};

法二：使用辅助函数（推荐）

src/utils/canvasPatch.ts：

// src/utils/canvasPatch.ts/** * 应用 Canvas 性能优化补丁 */export function applyCanvasPerformancePatch() { // 保存原始方法 const originalGetContext = HTMLCanvasElement.prototype.getContext // 使用类型安全的实现 HTMLCanvasElement.prototype.getContext = function <T extends RenderingContext | null>( contextId: string, options?: any ): T { if (contextId === \"2d\") { // 处理 2D 上下文 const context = originalGetContext.call(this, contextId, { willReadFrequently: true, ...(options || {}), }) as CanvasRenderingContext2D | null return context as T } // 处理其他上下文类型 return originalGetContext.call(this, contextId, options) as T }}

然后在 main.ts 中使用：

// main.tsimport { createApp } from \'vue\'import App from \'./App.vue\'import { applyCanvasPerformancePatch } from \'@/utils/canvasPatch\'// 在创建 Vue 应用前应用补丁applyCanvasPerformancePatch()const app = createApp(App)app.mount(\'#app\')