【报Bug】canvas中measureText的问题

示例代码：

<template>  
<view @tap="ceshi">  
测试  
</view>  
</template>  

<script>  
export default {  
data() {  
return {  
measureContext: null  
}  
},  
created() {  
this.download()  
},  
methods: {  
ceshi(){  
uni.navigateTo({  
url:'/pages/index/tiao'  
})  
},  
async download() {  
// 下载字体文件  
const cachedPath = uni.getStorageSync(  
'https://write.quickoj.com/uploads/font_ttf/8320702d427f13b080819d668effc629.ttf ');  
console.log(cachedPath)  
if (cachedPath) {  
try {  
await this.loadFontFace(cachedPath)  
return  
} catch (e) {  
console.log('缓存字体加载失败，重新下载', e);  
uni.removeStorageSync(item.font_url); // 移除无效缓存  
}  
}  
console.log('下载')  
const tempPath = await this.downloadFontFile(  
'https://write.quickoj.com/uploads/font_ttf/8320702d427f13b080819d668effc629.ttf ');  
// 保存到本地（仅小程序/部分App支持）  
const savedPath = await this.saveFile(tempPath);  
uni.setStorageSync('https://write.quickoj.com/uploads/font_ttf/8320702d427f13b080819d668effc629.ttf ',  
savedPath);  
await this.loadFontFace(savedPath);  
},  
downloadFontFile(url) {  
return new Promise((resolve, reject) => {  
uni.downloadFile({  
url,  
success: (res) => {  
if (res.statusCode === 200) {  
resolve(res.tempFilePath);  
} else {  
reject(`下载失败，状态码：${res.statusCode}`);  
}  
},  
fail: reject,  
});  
});  
},  
saveFile(tempFilePath) {  
return new Promise((resolve, reject) => {  
uni.saveFile({  
tempFilePath,  
success: (res) => {  
resolve(res.savedFilePath); // 返回持久化路径  
},  
fail: reject,  
});  
});  
},  
loadFontFace(filePath, index, item) {  
const fontFamily = `customFont_1`;  
uni.loadFontFace({  
family: fontFamily,  
source: `url("${filePath}")`,  
success: () => {  
this.fontFamily = fontFamily  
this.createMeasureContext()  
// console.log(this.fontCache)  
},  
fail: (err) => {  
console.error(`字体加载失败，尝试回退网络地址：${item.font_url}`, err);  
}  
});  
},  
// 创建测量上下文的独立方法  
createMeasureContext() {  
try {  
// 创建测量上下文  
this.measureContext = uni.createCanvasContext('measureCanvas2', this);  
// 设置字体  
console.log('fontFamily', this.fontFamily)  
// const fontFamily = '"Noto Sans Thai", "Thonburi", "Tahoma", sans-serif';  
this.measureContext.font = `30px ${this.fontFamily || 'sans-serif'}`;  
console.log(this.measureContext)  
// 验证字体设置是否生效  
const testText = 'สวัสดีครับ';  
const metrics = this.measureContext.measureText(testText);  
console.log('测量上下文创建完成，测试文本宽度:', metrics.width);  
} catch (error) {  
console.error('创建测量上下文失败:', error);  
}  
},  
}  
}  
</script>  

<style lang="scss">  

</style>

操作步骤：

我这段代码放在底部导航栏首页index里可以获取正常metrics.width，但放在底部导航栏我的页面同样代码获取metrics.width就异常，在页面也可以正常渲染该字体

预期结果：

metrics.width为78.62992858886719

实际结果：

metrics.width为125.1123046875