Capacitor 5升级至6时CLI迁移失败，遇npm安装及图标问题

迁移时遇到的异常信息 #

✖ Installing Latest Modules using npm. - failed!
[error] npm install failed. Try deleting node_modules folder and running npm install --force manually.
[error] Unable to find AppIcon-512@2x.png. Try updating it manually
✔ Update App Icon to only 1024 x 1024 in 391.79μs
✔ Remove Podfile.lock from iOS .gitignore in 331.92μs
✔ Migrating build.gradle file. in 6.71ms
✔ Remove android.enableJetifier=true from gradle.properties in 363.96μs
[error] Found namespace in build.gradle already, skipping migration
✔ Migrating package from Manifest to build.gradle in 460.83μs
✔ Migrating gradle-wrapper.properties by updating gradle version to 8.0.2. in 479.67μs
✔ Migrating variables.gradle file. in 2.82ms
[warn] Skipped migrating package from Manifest to build.gradle in Capacitor plugins
[warn] Skipped Running cap sync.
[warn] Skipped upgrading gradle wrapper files
✔ Writing breaking changes. in 125.63μs
[warn] Migration to Capacitor ^5.0.0 is incomplete. Check the log messages for more information.

分步解决方案 #

• 修复npm安装失败

  1. 删除项目根目录下的node_modules文件夹和package-lock.json文件
  2. 执行命令：npm install --force
  3. 若仍失败，检查package.json中Capacitor相关依赖（如@capacitor/core、@capacitor/android、@capacitor/ios）是否已指定^6.x.x版本，手动调整后重新执行安装

• 修复AppIcon缺失问题

  1. 找到iOS项目的Assets.xcassets/AppIcon.appiconset目录
  2. 确认是否存在AppIcon-512@2x.png（要求尺寸为1024x1024），缺失则生成对应图标放入该目录
  3. 执行命令：cap sync ios同步图标配置

• 处理build.gradle namespace提示
  该提示为正常情况，说明Android项目的android/app/build.gradle中已配置namespace字段，无需额外操作，可自行核对字段值是否匹配应用包名

• 完成剩余迁移步骤

  1. 重新执行迁移命令：npx @capacitor/cli migrate
  2. 执行全平台同步：cap sync
  3. 检查Android项目gradle/wrapper/gradle-wrapper.properties中的distributionUrl是否已更新至gradle 8.0.2版本，未更新则手动调整

内容的提问来源于stack exchange，提问作者Xero