首先，unity3d 2021版本確實從一些方面進行了更新，但是unity HUB的安裝也確實挺麻煩。聽說有大神可以繞過HUB，但我沒有成功。用一段时间HUB后，发现HUB还是很好用的，对于项目管理、版本管理都很到位，不建议安装高版本的HUB，2.3~2.4版本就很不错，运行速度快、占用资源少，最重要的是功能和高版本没有区别。3.0以后的版本就很庞大了，不建议使用。
其次，unity3d從2018開始，國內外用著兩個不同的版本。國內版本主文件加殼，PJ帶來困難。國外版本不好獲得。你可以嘗試進入英文官網，發現下載頁面打不開，因爲我們國內的IP被屏蔽了，包括部分台灣的IP。HUB內部安裝並沒有國外的版本。你用科學上網的方法可以下載，但科學上網是違法的哦。
另外，PJ的方法在這篇中就不再提及了，我分開文章說明。
所以，這篇筆記，我留下一些對大家有用的資料。下載地址複制到浏覽器，打開後自動連接HUB安裝相應版本。雖然是國外版本，但是是可以選擇下載中文語言的。
大家安裝時有什麽問題，可以加入我的q①群636131416，②群1022783217。
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