微信小程序全局水印组件

• 在components文件夹下新建watermark页面

watermark.wxml

<view class="water_top" style="pointer-events: none;">
    <view class="water-text">{{watermarkText}}view>
    <view class="water-text">{{watermarkText}}view>
    <view class="water-text">{{watermarkText}}view>
    <view class="water-text">{{watermarkText}}view>
    <view class="water-text">{{watermarkText}}view>
    <view class="water-text">{{watermarkText}}view>
    <view class="water-text">{{watermarkText}}view>
    <view class="water-text">{{watermarkText}}view>
    <view class="water-text">{{watermarkText}}view>
view>

watermark.wxss

.water_top{
  position: fixed;
  top:0;
  bottom: 0;
  left: 0;
  right: 0;
  transform:rotate(-12deg); /** 旋转 可自己调整 **/
  z-index: 9999;
}
.water-text{
  float: left;
  width:375rpx;
  color: rgba(169,169,169,.1); //文字颜色
  text-align: center;
  font-size: 95%;
  margin: 100rpx 0; /** 间距 可自调 **/
}

watermark.js

// components/watermark/watermark.js
import { getUserInfo } from "../../api/api"
Component({
  /**
   * 组件的属性列表
   */
  properties: {
    name:String
  },
 
  /**
   * 组件的初始数据
   */
  data: {
    watermarkText:'测试'
  },
 
  /**
   * 组件生命周期声明对象，组件的生命周期
   * ：created、attached、ready、moved、detached 
   * 将收归到 lifetimes 字段内进行声明
   * 原有声明方式仍旧有效，如同时存在两种声明方式
   * 则 lifetimes 字段内声明方式优先级最高
   */
  lifetimes:{
    ready(){
      this.getUserInfo();
    }
  },
 
  /**
   * 组件的方法列表
   */
  methods: {
    getUserInfo(){
        getUserInfo().then(res=>{
            this.setData({
                watermarkText: res.data?.name
            })
        }).catch(err=>{
            wx.showToast({
                title: err.data,
                icon: 'none'
            })
        })
    }
 
  }
})
 

• app.json 全局引用

{
  ...
  "usingComponents": {
    "watermark":"./components/watermark/watermark"
  }
}
 

• 单个页面使用，找到需要使用水印的页面添加如下代码即可

<watermark name="班长">watermark>

• 全局页面使用

新建文件generator/index.js

 代码如下

/**
 * @description: 将组件插入到小程序项目，包括app.json和page
 * @param {string} cpName 组件名
 * @param {string} cpPath 组件路径
 * @param {string} cpString 要插入的组件字符串内容
 * @param {Array} whiteList 不需要插入的组件
 * @return {*}
 */
function insertComponent(
  cpName = 'watermark',
  cpPath = '/components/watermark/watermark',
  cpString = ``,
  whiteList = []
) {
  try {
    const path = require('path');
    const fs = require('fs');
    const entryFilePath = './app.json';
 
    if (fs.statSync(entryFilePath)) {
      const { EOL } = require('os');
 
      // app.json 内容
      const contentMain = fs.readFileSync(path.resolve(entryFilePath), {
        encoding: 'utf-8',
      });
      // 获取每行内容
      const contentMainLine = contentMain.split(/\r?\n/g);
      // 组件（'new-user-dialog':）正则
      const compReg = eval(`/['"]?${cpName}['"]?:/`);
      // 组件正则
      const usingComponentReg = /['"]?usingComponents['"]?:/;
      // 检测组件配置项所在行
      const ucLineNum = contentMainLine.findIndex(line =>
        line.match(usingComponentReg)
      );
 
      // TODO: 插入组件部分
      // 检测tabbar
      const tabBarStartReg = /['"]?tabBar['"]?:/;
      // app.json没有配置自定义组件，自定义添加
      if (!compReg.test(contentMain)) {
        // 如果没有usingComponent配置项的话，就找tabbar，放在后面
        if (ucLineNum < 0) {
          const tabBarLineNum = contentMainLine.findIndex(line =>
            line.match(tabBarStartReg)
          );
          contentMainLine[
            tabBarLineNum - 1
          ] += `${EOL}  "usingComponents": { "${cpName}": "${cpPath}" },`;
        } else {
          // 有配置项，放到配置项里面
          contentMainLine[ucLineNum] += `${EOL}    "${cpName}": "${cpPath}",`;
        }
        fs.writeFileSync(
          path.resolve(entryFilePath),
          contentMainLine.join(EOL),
          { encoding: 'utf-8' }
        );
      }
 
      // TODO: 插入page部分
      // pages开始，逗号结尾的部分
      const pageConfigReg = /['"]?pages['"]?: \[([^\]]+)\],/;
      // 将pages按照逗号分隔为数组
      const pageList = pageConfigReg
        .exec(contentMain)[1]
        .replace(/\s+/g, '')
        .replace(/"/g, '')
        .replace(/\n\s+/g, '')
        .split(',')
        .filter(pn => {
          return !whiteList.includes(pn);
        });
      pageList.forEach(pagePath => {
        insertFileToPage(pagePath, cpString);
      });
    }
  } catch (error) {
    console.warn(error);
  }
}
 
/**
 * @description: 将组件插入到page
 * @param {string} pagePath 组件page路径
 * @param {string} cpString 要插入的组件字符串内容
 * @return {*}
 */
function insertFileToPage(pagePath, cpString) {
  const path = require('path');
  const fs = require('fs');
  if (pagePath.indexOf('wxml' < 0)) {
    pagePath += '.wxml';
  }
  const pageContent = fs.readFileSync(path.resolve(pagePath), {
    encoding: 'utf-8',
  });
  // 组件（'new-user-dialog':）正则
  const compReg = new RegExp(cpString);
 
  // 没有引用标签则添加标签引用
  if (!compReg.test(pageContent)) {
    const { EOL } = require('os');
    const pageLine = pageContent.split(/\r?\n/g);
    // 添加到最后一行
    pageLine[pageLine.length - 1] += `${EOL}${cpString}`;
    fs.writeFileSync(path.resolve(pagePath), pageLine.join(EOL), {
      encoding: 'utf-8',
    });
  }
}
 
/**
 * @description: 将组件插入到小程序项目，包括app.json和page
 * @param {string} cpName 组件名
 * @param {string} cpPath 组件路径
 * @param {string} cpString 要插入的组件字符串内容
 * @param {Array} whiteList 不需要插入的组件
 * @return {*}
 */
function deleteComponent(
  cpName = 'new-user-dialog',
  cpPath = '/components/newUserDialog/newUserDialog',
  cpString = ``,
  whiteList = [
    'pages/mine/login/logout/logut',
    'pages/mine/login/method/method',
    'pages/mine/login/scan/scan',
    'pages/mine/login/people/people',
    'pages/mine/collect/collect',
  ]
) {
  try {
    const path = require('path');
    const fs = require('fs');
    const entryFilePath = './app.json';
 
    if (fs.statSync(entryFilePath)) {
      // app.json 内容
      const contentMain = fs.readFileSync(path.resolve(entryFilePath), {
        encoding: 'utf-8',
      });
      // pages开始，逗号结尾的部分
      const pageConfigReg = /['"]?pages['"]?: \[([^\]]+)\],/;
      // 将pages按照逗号分隔为数组
      const pageList = pageConfigReg
        .exec(contentMain)[1]
        .replace(/\s+/g, '')
        .replace(/"/g, '')
        .replace(/\n\s+/g, '')
        .split(',')
        .filter(pn => {
          return !whiteList.includes(pn);
        });
      pageList.forEach(pagePath => {
        deleteFileToPage(pagePath, cpString);
      });
    }
  } catch (error) {
    console.warn(error);
  }
}
 
/**
 * @description: 将组件从page中删除
 * @param {string} pagePath 组件page路径
 * @param {string} cpString 要删除的组件字符串内容
 * @return {*}
 */
function deleteFileToPage(pagePath, cpString) {
  const path = require('path');
  const fs = require('fs');
  if (pagePath.indexOf('wxml' < 0)) {
    pagePath += '.wxml';
  }
  let pageContent = fs.readFileSync(path.resolve(pagePath), {
    encoding: 'utf-8',
  });
  // 组件（'new-user-dialog':）正则
  const compReg = new RegExp(cpString, 'g');
 
  // 有引用标签则删除标签引用
  if (compReg.test(pageContent)) {
    pageContent = pageContent.replace(compReg, '');
    fs.writeFileSync(path.resolve(pagePath), pageContent, {
      encoding: 'utf-8',
    });
  }
}
 
// deleteComponent()
insertComponent();
 

在使用命令工具内输入：
node .\generator\index.js

即可实现

参考链接： https://blog.csdn.net/Depressiom/article/details/124707186?spm=1001.2101.3001.6650.2&utm_medium=distribute.pc_relevant.none-task-blog-2%7Edefault%7ECTRLIST%7ERate-2-124707186-blog-121975714.pc_relevant_multi_platform_whitelistv4&depth_1-utm_source=distribute.pc_relevant.none-task-blog-2%7Edefault%7ECTRLIST%7ERate-2-124707186-blog-121975714.pc_relevant_multi_platform_whitelistv4&utm_relevant_index=4

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