Flutter 多个版本切换控制

cd ~/flutter

# Checkout needed version
git checkout 1.22.6

# Download Dart SDK, tools, etc.
flutter doctor

# Check Flutter and Dart version
flutter --version

当你需要切换回最新版本时，反之亦然:

cd ~/flutter

# Switch back to the stable channel
flutter channel stable

# Switch to latest version
# flutter doctor will be invoked at this step
flutter upgrade

# Check Dart and Flutter  version
flutter --version