问颤振:当前的颤振SDK版本为0.0.0-未知

EN

Running "flutter pub get" in testapp...                  
The current Flutter SDK version is 0.0.0-unknown.

Because qr_code_scanner 0.0.13 requires Flutter SDK version ^1.10.0 and no versions of qr_code_scanner match >0.0.13 <0.1.0, qr_code_scanner ^0.0.13 is forbidden.

So, because testapp depends on qr_code_scanner ^0.0.13, version solving failed.
pub get failed (1; So, because testapp depends on qr_code_scanner ^0.0.13, version solving failed.)
exit code 1

Doctor summary (to see all details, run flutter doctor -v):
[✓] Flutter (Channel stable, 1.22.4, on Mac OS X 10.15.7 19H2 darwin-x64, locale
    en-IN)
 
[✓] Android toolchain - develop for Android devices (Android SDK version 28.0.3)
[✗] Xcode - develop for iOS and macOS
    ✗ Xcode installation is incomplete; a full installation is necessary for iOS
      development.
      Download at: https://developer.apple.com/xcode/download/
      Or install Xcode via the App Store.
      Once installed, run:
        sudo xcode-select --switch /Applications/Xcode.app/Contents/Developer
        sudo xcodebuild -runFirstLaunch
    ✗ CocoaPods not installed.
        CocoaPods is used to retrieve the iOS and macOS platform side's plugin
        code that responds to your plugin usage on the Dart side.
        Without CocoaPods, plugins will not work on iOS or macOS.
        For more info, see https://flutter.dev/platform-plugins
      To install:
        sudo gem install cocoapods
[✓] Android Studio (version 3.1)
[✓] VS Code (version 1.51.1)
[✓] Connected device (1 available)

! Doctor found issues in 1 category.

  flutter:
    dependency: "direct main"
    description: flutter
    source: sdk
    version: "0.0.0"