refactor: 架构升级

2026-09-13 00:50:40 +08:00 · 2026-08-31 07:58:23 +08:00
commit ba5b77568b
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+# canvas
+
+## Instructions
+
+画布
+
+属性说明
+
+注意事项：
+
+### Syntax
+
+- 使用 `<canvas />`（或 `<canvas></canvas>`，当需要包裹子节点时）。
+- 遇到平台差异时，建议使用条件编译（`#ifdef / #endif`）显式处理。
+
+#### Properties
+
+| 属性名 | 类型 | 默认值 | 说明 | 平台差异说明 |
+| --- | --- | --- | --- | --- |
+| type | String |  | 指定 canvas 类型，支持 2d 和 webgl | 微信小程序2.7.0+ 、抖音小程序1.78.0+、支付宝小程序2.7.0+ |
+| canvas-id | String |  | canvas 组件的唯一标识符 |  |
+| disable-scroll | Boolean | false | 当在 canvas 中移动时且有绑定手势事件时，禁止屏幕滚动以及下拉刷新 | 抖音小程序与飞书小程序不支持 |
+| hidpi | Boolean | true | 是否启用高清处理 | H5 (HBuilder X 3.4.0+)、App-vue (HBuilder X 3.4.0+) |
+
+#### Events
+
+| 事件名 | 类型 | 默认值 | 说明 | 平台差异说明 |
+| --- | --- | --- | --- | --- |
+| @touchstart | EventHandle |  | 手指触摸动作开始 | 抖音小程序1.78.0+、小红书小程序 |
+| @touchmove | EventHandle |  | 手指触摸后移动 | 抖音小程序1.78.0+、小红书小程序 |
+| @touchend | EventHandle |  | 手指触摸动作结束 | 抖音小程序1.78.0+、小红书小程序 |
+| @touchcancel | EventHandle |  | 手指触摸动作被打断，如来电提醒，弹窗 | 抖音小程序1.78.0+ |
+| @longtap | EventHandle |  | 手指长按 500ms 之后触发，触发了长按事件后进行移动不会触发屏幕的滚动 | 抖音小程序与飞书小程序不支持 |
+| @error | EventHandle |  | 当发生错误时触发 error 事件，detail = {errMsg: 'something wrong'} | 抖音小程序与飞书小程序不支持 |
+
+#### Platform Compatibility
+
+See official docs for platform support table: `https://doc.dcloud.net.cn/uni-app-x/component/canvas.html`
+
+### Examples
+
+### Example (Example 1)
+
+```vue
+<template>
+	<view>
+		<canvas style="width: 300px; height: 200px;" canvas-id="firstCanvas" id="firstCanvas"></canvas>
+		<canvas style="width: 400px; height: 500px;" canvas-id="secondCanvas" id="secondCanvas"></canvas>
+		<canvas style="width: 400px; height: 500px;" canvas-id="secondCanvas" id="secondCanvas" @error="canvasIdErrorCallback"></canvas>
+	</view>
+</template>
+```
+
+### Example (Example 2)
+
+```vue
+<template>
+	<view>
+		<canvas style="width: 300px; height: 200px;" canvas-id="firstCanvas" id="firstCanvas"></canvas>
+		<canvas style="width: 400px; height: 500px;" canvas-id="secondCanvas" id="secondCanvas"></canvas>
+		<canvas style="width: 400px; height: 500px;" canvas-id="secondCanvas" id="secondCanvas" @error="canvasIdErrorCallback"></canvas>
+	</view>
+</template>
+```
+
+### Example (Example 3)
+
+```vue
+<script>
+export default {
+	onReady: function (e) {
+		var context = uni.createCanvasContext('firstCanvas')
+		context.setStrokeStyle("#00ff00")
+		context.setLineWidth(5)
+		context.rect(0, 0, 200, 200)
+		context.stroke()
+		context.setStrokeStyle("#ff0000")
+		context.setLineWidth(2)
+		context.moveTo(160, 100)
+		context.arc(100, 100, 60, 0, 2 * Math.PI, true)
+		context.moveTo(140, 100)
+		context.arc(100, 100, 40, 0, Math.PI, false)
+		context.moveTo(85, 80)
+		context.arc(80, 80, 5, 0, 2 * Math.PI, true)
+		context.moveTo(125, 80)
+		context.arc(120, 80, 5, 0, 2 * Math.PI, true)
+		context.stroke()
+		context.draw()
+	},
+	methods: {
+		canvasIdErrorCallback: function (e) {
+			console.error(e.detail.errMsg)
+		}
+	}
+}
+</script>
+```
+
+Reference: [Official Documentation](https://doc.dcloud.net.cn/uni-app-x/component/canvas.html)