Unity开发PC端游戏使用Firebase遇问题：缺失文件无处下载

Hey there! Let's work through this missing Firebase SDK file issue for your PC-only Unity game—this is a common hiccup, so I’ve got some tried-and-true fixes to share:

Firebase’s console lets you pick exactly which platforms to include in your SDK download. It’s easy to accidentally uncheck Windows/Mac/Linux when you’re focused on other settings. Head back to your Firebase project’s SDK download page, re-generate the bundle, and double-check that the desktop platforms matching your target (Windows, Mac, Linux) are all checked. This ensures you’re not getting a mobile-only SDK package.

When you import the Firebase .unitypackage, Unity might auto-skip files it thinks are incompatible with your build target. Let’s fix that:

• If you used the downloaded package: Re-import it, and in the import window, expand every folder to make sure all PC-relevant files are checked (look for folders labeled Desktop or your specific OS under Plugins).
• If you used the Package Manager: Go to Window > Package Manager > Firebase, select your installed Firebase package, and check that the "Include Platforms" settings have your PC target enabled.

Sometimes the manual SDK bundle download misses files—using UPM is often more consistent for Unity projects. Here’s how:

• First, add the npm registry to your project’s Packages/manifest.json by inserting this line inside the top-level object:

  "registry": "https://registry.npmjs.org/"
  

• Open Window > Package Manager, click the + button, and select "Add package from git URL".
• Paste the Git URL for the Firebase service you need (e.g., com.google.firebase.analytics for Analytics, com.google.firebase.auth for Auth). UPM will automatically pull the correct binaries for your PC build target.

Cached files can mess with SDK imports. Try this fresh start:

• Delete the entire Assets/Firebase folder from your project.
• Delete the Library folder in your project root (this forces Unity to rebuild its cache—just note it might take a few minutes to finish).
• Re-download the correct PC-focused Firebase SDK bundle and re-import it into Unity.

Firebase SDKs have strict compatibility with Unity versions. If you’re using an older Unity editor, a brand-new Firebase SDK might drop support for it, or vice versa. Look up the Firebase release notes to find a version that matches your Unity version, then download that specific SDK bundle.

内容的提问来源于stack exchange，提问作者Seaky Lone