今天提交代碼出現(xiàn)以下現(xiàn)象：

admin:ios-hybird-flutter Red$ git add .
admin:ios-hybird-flutter Red$ git st
On branch master
Your branch is up to date with 'origin/master'.

Changes to be committed:
  (use "git restore --staged <file>..." to unstage)
    new file:   FlutterBoostDemo/.gitignore
    new file:   FlutterBoostDemo/.metadata
    new file:   FlutterBoostDemo/FlutterBoostDemo.iml
    new file:   FlutterBoostDemo/FlutterBoostDemo_android.iml
    new file:   FlutterBoostDemo/README.md
    new file:   FlutterBoostDemo/lib/FirstPage.dart
    new file:   FlutterBoostDemo/lib/main.dart
    new file:   FlutterBoostDemo/pubspec.lock
    new file:   FlutterBoostDemo/pubspec.yaml
    new file:   FlutterBoostDemo/test/widget_test.dart
    new file:   SwiftDemo

Changes not staged for commit:
  (use "git add <file>..." to update what will be committed)
  (use "git restore <file>..." to discard changes in working directory)
  (commit or discard the untracked or modified content in submodules)
    modified:   SwiftDemo (modified content, untracked content)

問題：

modified:   SwiftDemo (modified content, untracked content)

SwiftDemo目錄沒有被跟蹤，嘗試幾次都沒有add上去，從SourceTree上看SwiftDemo只是一個空目錄，目錄下的文件沒有加進(jìn)去。

解決辦法：
SwiftDemo目錄里有一個.git目錄，就是說SwiftDemo本身也是一個代碼庫。

admin:SwiftDemo Red$ rm -rf .git

刪除.git目錄后，git add . 還是不行。

最后把SwiftDemo目錄移動到其它目錄，再移回去，git add . 正常。