sidebar:/uploads/projects/swan-docs/program-docs/docs/develop/api/show//uploads/projects/swan-docs/program-docs/docs/develop/api/show/ canvas_CanvasContext-measureText

title:/uploads/projects/swan-docs/program-docs/docs/develop/api/show//uploads/projects/swan-docs/program-docs/docs/develop/api/show/ CanvasContext.measureText header:/uploads/projects/swan-docs/program-docs/docs/develop/api/show//uploads/projects/swan-docs/program-docs/docs/develop/api/show/ develop nav:/uploads/projects/swan-docs/program-docs/docs/develop/api/show//uploads/projects/swan-docs/program-docs/docs/develop/api/show/ api

sidebar:/uploads/projects/swan-docs/program-docs/docs/develop/api/show//uploads/projects/swan-docs/program-docs/docs/develop/api/show/ canvas_CanvasContext-measureText

/uploads/projects/swan-docs/program-docs/docs/develop/api/show//uploads/projects/swan-docs/program-docs/docs/develop/api/show/

解释：测量文本尺寸信息，目前仅返回文本宽度，同步接口。

/uploads/projects/swan-docs/program-docs/docs/develop/api/show//uploads/projects/swan-docs/program-docs/docs/develop/api/show/

/uploads/projects/swan-docs/program-docs/docs/develop/api/show//uploads/projects/swan-docs/program-docs/docs/develop/api/show/ 方法参数/uploads/projects/swan-docs/program-docs/docs/develop/api/show//uploads/projects/swan-docs/program-docs/docs/develop/api/show/

String/uploads/projects/swan-docs/program-docs/docs/develop/api/show//uploads/projects/swan-docs/program-docs/docs/develop/api/show/ text：要测量的文本/uploads/projects/swan-docs/program-docs/docs/develop/api/show//uploads/projects/swan-docs/program-docs/docs/develop/api/show/ /uploads/projects/swan-docs/program-docs/docs/develop/api/show//uploads/projects/swan-docs/program-docs/docs/develop/api/show/

/uploads/projects/swan-docs/program-docs/docs/develop/api/show//uploads/projects/swan-docs/program-docs/docs/develop/api/show/ 返回值

返回/uploads/projects/swan-docs/program-docs/docs/develop/api/show//uploads/projects/swan-docs/program-docs/docs/develop/api/show/ TextMetrics/uploads/projects/swan-docs/program-docs/docs/develop/api/show//uploads/projects/swan-docs/program-docs/docs/develop/api/show/ 对象，结构如下：

|/uploads/projects/swan-docs/program-docs/docs/develop/api/show//uploads/projects/swan-docs/program-docs/docs/develop/api/show/ 参数名/uploads/projects/swan-docs/program-docs/docs/develop/api/show//uploads/projects/swan-docs/program-docs/docs/develop/api/show/ |/uploads/projects/swan-docs/program-docs/docs/develop/api/show//uploads/projects/swan-docs/program-docs/docs/develop/api/show/ 类型/uploads/projects/swan-docs/program-docs/docs/develop/api/show//uploads/projects/swan-docs/program-docs/docs/develop/api/show/ |/uploads/projects/swan-docs/program-docs/docs/develop/api/show//uploads/projects/swan-docs/program-docs/docs/develop/api/show/ 说明/uploads/projects/swan-docs/program-docs/docs/develop/api/show//uploads/projects/swan-docs/program-docs/docs/develop/api/show/ | |——/uploads/projects/swan-docs/program-docs/docs/develop/api/show//uploads/projects/swan-docs/program-docs/docs/develop/api/show/ |/uploads/projects/swan-docs/program-docs/docs/develop/api/show//uploads/projects/swan-docs/program-docs/docs/develop/api/show/ ——/uploads/projects/swan-docs/program-docs/docs/develop/api/show//uploads/projects/swan-docs/program-docs/docs/develop/api/show/ |/uploads/projects/swan-docs/program-docs/docs/develop/api/show//uploads/projects/swan-docs/program-docs/docs/develop/api/show/ ——/uploads/projects/swan-docs/program-docs/docs/develop/api/show//uploads/projects/swan-docs/program-docs/docs/develop/api/show/ | |/uploads/projects/swan-docs/program-docs/docs/develop/api/show//uploads/projects/swan-docs/program-docs/docs/develop/api/show/ width/uploads/projects/swan-docs/program-docs/docs/develop/api/show//uploads/projects/swan-docs/program-docs/docs/develop/api/show/ |/uploads/projects/swan-docs/program-docs/docs/develop/api/show//uploads/projects/swan-docs/program-docs/docs/develop/api/show/ Number/uploads/projects/swan-docs/program-docs/docs/develop/api/show//uploads/projects/swan-docs/program-docs/docs/develop/api/show/ |/uploads/projects/swan-docs/program-docs/docs/develop/api/show//uploads/projects/swan-docs/program-docs/docs/develop/api/show/ 文本的宽度/uploads/projects/swan-docs/program-docs/docs/develop/api/show//uploads/projects/swan-docs/program-docs/docs/develop/api/show/ |

/uploads/projects/swan-docs/program-docs/docs/develop/api/show//uploads/projects/swan-docs/program-docs/docs/develop/api/show/ 示例

在开发者工具中预览效果 /uploads/projects/swan-docs/program-docs/docs/develop/api/show//uploads/projects/swan-docs/program-docs/docs/develop/api/show/

/uploads/projects/swan-docs/program-docs/docs/develop/api/show//uploads/projects/swan-docs/program-docs/docs/develop/api/show/ 扫码体验

/uploads/projects/swan-docs/program-docs/docs/develop/api/show//uploads/projects/swan-docs/program-docs/docs/develop/api/show/ /uploads/projects/swan-docs/program-docs/docs/develop/api/show//uploads/projects/swan-docs/program-docs/docs/develop/api/show/ /uploads/projects/swan-docs/program-docs/docs/develop/api/show//uploads/projects/swan-docs/program-docs/docs/develop/api/show/ /uploads/projects/swan-docs/program-docs/docs/develop/api/show//uploads/projects/swan-docs/program-docs/docs/develop/api/show/ /uploads/projects/swan-docs/program-docs/docs/develop/api/show//uploads/projects/swan-docs/program-docs/docs/develop/api/show/ /uploads/projects/swan-docs/program-docs/docs/develop/api/show//uploads/projects/swan-docs/program-docs/docs/develop/api/show/ /uploads/projects/swan-docs/program-docs/docs/develop/api/show//uploads/projects/swan-docs/program-docs/docs/develop/api/show/ /uploads/projects/swan-docs/program-docs/docs/develop/api/show//uploads/projects/swan-docs/program-docs/docs/develop/api/show/ 请使用百度APP扫码

/uploads/projects/swan-docs/program-docs/docs/develop/api/show//uploads/projects/swan-docs/program-docs/docs/develop/api/show/ /uploads/projects/swan-docs/program-docs/docs/develop/api/show//uploads/projects/swan-docs/program-docs/docs/develop/api/show/ 图片示例/uploads/projects/swan-docs/program-docs/docs/develop/api/show//uploads/projects/swan-docs/program-docs/docs/develop/api/show/ /uploads/projects/swan-docs/program-docs/docs/develop/api/show//uploads/projects/swan-docs/program-docs/docs/develop/api/show/

/uploads/projects/swan-docs/program-docs/docs/develop/api/show//uploads/projects/swan-docs/program-docs/docs/develop/api/show/ /uploads/projects/swan-docs/program-docs/docs/develop/api/show//uploads/projects/swan-docs/program-docs/docs/develop/api/show/ /uploads/projects/swan-docs/program-docs/docs/develop/api/show//uploads/projects/swan-docs/program-docs/docs/develop/api/show/ /uploads/projects/swan-docs/program-docs/docs/develop/api/show//uploads/projects/swan-docs/program-docs/docs/develop/api/show/

/uploads/projects/swan-docs/program-docs/docs/develop/api/show//uploads/projects/swan-docs/program-docs/docs/develop/api/show/ /uploads/projects/swan-docs/program-docs/docs/develop/api/show//uploads/projects/swan-docs/program-docs/docs/develop/api/show/ /uploads/projects/swan-docs/program-docs/docs/develop/api/show//uploads/projects/swan-docs/program-docs/docs/develop/api/show/ /uploads/projects/swan-docs/program-docs/docs/develop/api/show//uploads/projects/swan-docs/program-docs/docs/develop/api/show/ /uploads/projects/swan-docs/program-docs/docs/develop/api/show//uploads/projects/swan-docs/program-docs/docs/develop/api/show/ /uploads/projects/swan-docs/program-docs/docs/develop/api/show//uploads/projects/swan-docs/program-docs/docs/develop/api/show/ /uploads/projects/swan-docs/program-docs/docs/develop/api/show//uploads/projects/swan-docs/program-docs/docs/develop/api/show/ /uploads/projects/swan-docs/program-docs/docs/develop/api/show//uploads/projects/swan-docs/program-docs/docs/develop/api/show/ /uploads/projects/swan-docs/program-docs/docs/develop/api/show//uploads/projects/swan-docs/program-docs/docs/develop/api/show/ /uploads/projects/swan-docs/program-docs/docs/develop/api/show//uploads/projects/swan-docs/program-docs/docs/develop/api/show/ /uploads/projects/swan-docs/program-docs/docs/develop/api/show//uploads/projects/swan-docs/program-docs/docs/develop/api/show/ /uploads/projects/swan-docs/program-docs/docs/develop/api/show//uploads/projects/swan-docs/program-docs/docs/develop/api/show/

/uploads/projects/swan-docs/program-docs/docs/develop/api/show//uploads/projects/swan-docs/program-docs/docs/develop/api/show/ /uploads/projects/swan-docs/program-docs/docs/develop/api/show//uploads/projects/swan-docs/program-docs/docs/develop/api/show/ /uploads/projects/swan-docs/program-docs/docs/develop/api/show//uploads/projects/swan-docs/program-docs/docs/develop/api/show/ /uploads/projects/swan-docs/program-docs/docs/develop/api/show//uploads/projects/swan-docs/program-docs/docs/develop/api/show/

/uploads/projects/swan-docs/program-docs/docs/develop/api/show//uploads/projects/swan-docs/program-docs/docs/develop/api/show/ /uploads/projects/swan-docs/program-docs/docs/develop/api/show//uploads/projects/swan-docs/program-docs/docs/develop/api/show/ /uploads/projects/swan-docs/program-docs/docs/develop/api/show//uploads/projects/swan-docs/program-docs/docs/develop/api/show/ /uploads/projects/swan-docs/program-docs/docs/develop/api/show//uploads/projects/swan-docs/program-docs/docs/develop/api/show/ /uploads/projects/swan-docs/program-docs/docs/develop/api/show//uploads/projects/swan-docs/program-docs/docs/develop/api/show/ /uploads/projects/swan-docs/program-docs/docs/develop/api/show//uploads/projects/swan-docs/program-docs/docs/develop/api/show/ /uploads/projects/swan-docs/program-docs/docs/develop/api/show//uploads/projects/swan-docs/program-docs/docs/develop/api/show/ /uploads/projects/swan-docs/program-docs/docs/develop/api/show//uploads/projects/swan-docs/program-docs/docs/develop/api/show/ /uploads/projects/swan-docs/program-docs/docs/develop/api/show//uploads/projects/swan-docs/program-docs/docs/develop/api/show/ /uploads/projects/swan-docs/program-docs/docs/develop/api/show//uploads/projects/swan-docs/program-docs/docs/develop/api/show/ /uploads/projects/swan-docs/program-docs/docs/develop/api/show//uploads/projects/swan-docs/program-docs/docs/develop/api/show/ /uploads/projects/swan-docs/program-docs/docs/develop/api/show//uploads/projects/swan-docs/program-docs/docs/develop/api/show/

/uploads/projects/swan-docs/program-docs/docs/develop/api/show//uploads/projects/swan-docs/program-docs/docs/develop/api/show/ /uploads/projects/swan-docs/program-docs/docs/develop/api/show//uploads/projects/swan-docs/program-docs/docs/develop/api/show/ /uploads/projects/swan-docs/program-docs/docs/develop/api/show//uploads/projects/swan-docs/program-docs/docs/develop/api/show/ /uploads/projects/swan-docs/program-docs/docs/develop/api/show//uploads/projects/swan-docs/program-docs/docs/develop/api/show/

/uploads/projects/swan-docs/program-docs/docs/develop/api/show//uploads/projects/swan-docs/program-docs/docs/develop/api/show/ /uploads/projects/swan-docs/program-docs/docs/develop/api/show//uploads/projects/swan-docs/program-docs/docs/develop/api/show/ /uploads/projects/swan-docs/program-docs/docs/develop/api/show//uploads/projects/swan-docs/program-docs/docs/develop/api/show/ /uploads/projects/swan-docs/program-docs/docs/develop/api/show//uploads/projects/swan-docs/program-docs/docs/develop/api/show/ /uploads/projects/swan-docs/program-docs/docs/develop/api/show//uploads/projects/swan-docs/program-docs/docs/develop/api/show/ /uploads/projects/swan-docs/program-docs/docs/develop/api/show//uploads/projects/swan-docs/program-docs/docs/develop/api/show/ /uploads/projects/swan-docs/program-docs/docs/develop/api/show//uploads/projects/swan-docs/program-docs/docs/develop/api/show/ /uploads/projects/swan-docs/program-docs/docs/develop/api/show//uploads/projects/swan-docs/program-docs/docs/develop/api/show/ /uploads/projects/swan-docs/program-docs/docs/develop/api/show//uploads/projects/swan-docs/program-docs/docs/develop/api/show/ /uploads/projects/swan-docs/program-docs/docs/develop/api/show//uploads/projects/swan-docs/program-docs/docs/develop/api/show/ /uploads/projects/swan-docs/program-docs/docs/develop/api/show//uploads/projects/swan-docs/program-docs/docs/develop/api/show/ /uploads/projects/swan-docs/program-docs/docs/develop/api/show//uploads/projects/swan-docs/program-docs/docs/develop/api/show/

/uploads/projects/swan-docs/program-docs/docs/develop/api/show//uploads/projects/swan-docs/program-docs/docs/develop/api/show/ /uploads/projects/swan-docs/program-docs/docs/develop/api/show//uploads/projects/swan-docs/program-docs/docs/develop/api/show/ /uploads/projects/swan-docs/program-docs/docs/develop/api/show//uploads/projects/swan-docs/program-docs/docs/develop/api/show/ /uploads/projects/swan-docs/program-docs/docs/develop/api/show//uploads/projects/swan-docs/program-docs/docs/develop/api/show/ /uploads/projects/swan-docs/program-docs/docs/develop/api/show//uploads/projects/swan-docs/program-docs/docs/develop/api/show/

/uploads/projects/swan-docs/program-docs/docs/develop/api/show//uploads/projects/swan-docs/program-docs/docs/develop/api/show/ 代码示例/uploads/projects/swan-docs/program-docs/docs/develop/api/show//uploads/projects/swan-docs/program-docs/docs/develop/api/show/

:::codeTab

```/uploads/projects/swan-docs/program-docs/docs/develop/api/show//uploads/projects/swan-docs/program-docs/docs/develop/api/show/ swan

/uploads/projects/swan-docs/program-docs/docs/develop/api/show//uploads/projects/swan-docs/program-docs/docs/develop/api/show/ /uploads/projects/swan-docs/program-docs/docs/develop/api/show//uploads/projects/swan-docs/program-docs/docs/develop/api/show/ /uploads/projects/swan-docs/program-docs/docs/develop/api/show//uploads/projects/swan-docs/program-docs/docs/develop/api/show/ /uploads/projects/swan-docs/program-docs/docs/develop/api/show//uploads/projects/swan-docs/program-docs/docs/develop/api/show/ 在此输入文本信息 /uploads/projects/swan-docs/program-docs/docs/develop/api/show//uploads/projects/swan-docs/program-docs/docs/develop/api/show/ /uploads/projects/swan-docs/program-docs/docs/develop/api/show//uploads/projects/swan-docs/program-docs/docs/develop/api/show/ /uploads/projects/swan-docs/program-docs/docs/develop/api/show//uploads/projects/swan-docs/program-docs/docs/develop/api/show/ /uploads/projects/swan-docs/program-docs/docs/develop/api/show//uploads/projects/swan-docs/program-docs/docs/develop/api/show/ /uploads/projects/swan-docs/program-docs/docs/develop/api/show//uploads/projects/swan-docs/program-docs/docs/develop/api/show/ /uploads/projects/swan-docs/program-docs/docs/develop/api/show//uploads/projects/swan-docs/program-docs/docs/develop/api/show/ /uploads/projects/swan-docs/program-docs/docs/develop/api/show//uploads/projects/swan-docs/program-docs/docs/develop/api/show/ /uploads/projects/swan-docs/program-docs/docs/develop/api/show//uploads/projects/swan-docs/program-docs/docs/develop/api/show/ 点击获取文本信息的长度

/uploads/projects/swan-docs/program-docs/docs/develop/api/show//uploads/projects/swan-docs/program-docs/docs/develop/api/show/ 
```js
Page({
/uploads/projects/swan-docs/program-docs/docs/develop/api/show//uploads/projects/swan-docs/program-docs/docs/develop/api/show/ /uploads/projects/swan-docs/program-docs/docs/develop/api/show//uploads/projects/swan-docs/program-docs/docs/develop/api/show/ /uploads/projects/swan-docs/program-docs/docs/develop/api/show//uploads/projects/swan-docs/program-docs/docs/develop/api/show/ /uploads/projects/swan-docs/program-docs/docs/develop/api/show//uploads/projects/swan-docs/program-docs/docs/develop/api/show/ data:/uploads/projects/swan-docs/program-docs/docs/develop/api/show//uploads/projects/swan-docs/program-docs/docs/develop/api/show/ {
/uploads/projects/swan-docs/program-docs/docs/develop/api/show//uploads/projects/swan-docs/program-docs/docs/develop/api/show/ /uploads/projects/swan-docs/program-docs/docs/develop/api/show//uploads/projects/swan-docs/program-docs/docs/develop/api/show/ /uploads/projects/swan-docs/program-docs/docs/develop/api/show//uploads/projects/swan-docs/program-docs/docs/develop/api/show/ /uploads/projects/swan-docs/program-docs/docs/develop/api/show//uploads/projects/swan-docs/program-docs/docs/develop/api/show/ /uploads/projects/swan-docs/program-docs/docs/develop/api/show//uploads/projects/swan-docs/program-docs/docs/develop/api/show/ /uploads/projects/swan-docs/program-docs/docs/develop/api/show//uploads/projects/swan-docs/program-docs/docs/develop/api/show/ /uploads/projects/swan-docs/program-docs/docs/develop/api/show//uploads/projects/swan-docs/program-docs/docs/develop/api/show/ /uploads/projects/swan-docs/program-docs/docs/develop/api/show//uploads/projects/swan-docs/program-docs/docs/develop/api/show/ key:/uploads/projects/swan-docs/program-docs/docs/develop/api/show//uploads/projects/swan-docs/program-docs/docs/develop/api/show/ ''
/uploads/projects/swan-docs/program-docs/docs/develop/api/show//uploads/projects/swan-docs/program-docs/docs/develop/api/show/ /uploads/projects/swan-docs/program-docs/docs/develop/api/show//uploads/projects/swan-docs/program-docs/docs/develop/api/show/ /uploads/projects/swan-docs/program-docs/docs/develop/api/show//uploads/projects/swan-docs/program-docs/docs/develop/api/show/ /uploads/projects/swan-docs/program-docs/docs/develop/api/show//uploads/projects/swan-docs/program-docs/docs/develop/api/show/ },
/uploads/projects/swan-docs/program-docs/docs/develop/api/show//uploads/projects/swan-docs/program-docs/docs/develop/api/show/ /uploads/projects/swan-docs/program-docs/docs/develop/api/show//uploads/projects/swan-docs/program-docs/docs/develop/api/show/ /uploads/projects/swan-docs/program-docs/docs/develop/api/show//uploads/projects/swan-docs/program-docs/docs/develop/api/show/ /uploads/projects/swan-docs/program-docs/docs/develop/api/show//uploads/projects/swan-docs/program-docs/docs/develop/api/show/ keyInput(e)/uploads/projects/swan-docs/program-docs/docs/develop/api/show//uploads/projects/swan-docs/program-docs/docs/develop/api/show/ {
/uploads/projects/swan-docs/program-docs/docs/develop/api/show//uploads/projects/swan-docs/program-docs/docs/develop/api/show/ /uploads/projects/swan-docs/program-docs/docs/develop/api/show//uploads/projects/swan-docs/program-docs/docs/develop/api/show/ /uploads/projects/swan-docs/program-docs/docs/develop/api/show//uploads/projects/swan-docs/program-docs/docs/develop/api/show/ /uploads/projects/swan-docs/program-docs/docs/develop/api/show//uploads/projects/swan-docs/program-docs/docs/develop/api/show/ /uploads/projects/swan-docs/program-docs/docs/develop/api/show//uploads/projects/swan-docs/program-docs/docs/develop/api/show/ /uploads/projects/swan-docs/program-docs/docs/develop/api/show//uploads/projects/swan-docs/program-docs/docs/develop/api/show/ /uploads/projects/swan-docs/program-docs/docs/develop/api/show//uploads/projects/swan-docs/program-docs/docs/develop/api/show/ /uploads/projects/swan-docs/program-docs/docs/develop/api/show//uploads/projects/swan-docs/program-docs/docs/develop/api/show/ this.data.key/uploads/projects/swan-docs/program-docs/docs/develop/api/show//uploads/projects/swan-docs/program-docs/docs/develop/api/show/ =/uploads/projects/swan-docs/program-docs/docs/develop/api/show//uploads/projects/swan-docs/program-docs/docs/develop/api/show/ e.detail.value;
/uploads/projects/swan-docs/program-docs/docs/develop/api/show//uploads/projects/swan-docs/program-docs/docs/develop/api/show/ /uploads/projects/swan-docs/program-docs/docs/develop/api/show//uploads/projects/swan-docs/program-docs/docs/develop/api/show/ /uploads/projects/swan-docs/program-docs/docs/develop/api/show//uploads/projects/swan-docs/program-docs/docs/develop/api/show/ /uploads/projects/swan-docs/program-docs/docs/develop/api/show//uploads/projects/swan-docs/program-docs/docs/develop/api/show/ },
/uploads/projects/swan-docs/program-docs/docs/develop/api/show//uploads/projects/swan-docs/program-docs/docs/develop/api/show/ /uploads/projects/swan-docs/program-docs/docs/develop/api/show//uploads/projects/swan-docs/program-docs/docs/develop/api/show/ /uploads/projects/swan-docs/program-docs/docs/develop/api/show//uploads/projects/swan-docs/program-docs/docs/develop/api/show/ /uploads/projects/swan-docs/program-docs/docs/develop/api/show//uploads/projects/swan-docs/program-docs/docs/develop/api/show/ measureText()/uploads/projects/swan-docs/program-docs/docs/develop/api/show//uploads/projects/swan-docs/program-docs/docs/develop/api/show/ {
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:::

/uploads/projects/swan-docs/program-docs/docs/develop/api/show//uploads/projects/swan-docs/program-docs/docs/develop/api/show/ /uploads/projects/swan-docs/program-docs/docs/develop/api/show//uploads/projects/swan-docs/program-docs/docs/develop/api/show/ 错误码

/uploads/projects/swan-docs/program-docs/docs/develop/api/show//uploads/projects/swan-docs/program-docs/docs/develop/api/show/ Android

/uploads/projects/swan-docs/program-docs/docs/develop/api/show//uploads/projects/swan-docs/program-docs/docs/develop/api/show/ iOS

/uploads/projects/swan-docs/program-docs/docs/develop/api/show//uploads/projects/swan-docs/program-docs/docs/develop/api/show/