Run 'pod install' before building iOS app. (#8609)

Since iOS builds are CocoaPods enabled by default, we should make sure to run `pod install` to get pods wired up before building the app.

Also added a check to `flutter doctor` to verify CocoaPods is installed.

I'm passing FLUTTER_FRAMEWORK_DIR to the `pod install` command, so we can have the app's Podfile link in Flutter.framework as a pod instead of having to copy it over in xcode_backend.sh.
4 files changed
tree: 3be334ba4ac14653096fcb4142e6fa543f97528a
  1. .idea/
  2. bin/
  3. dev/
  4. examples/
  5. packages/
  6. .analysis_options
  7. .analysis_options_repo
  8. .gitattributes
  9. .gitignore
  10. .travis.yml
  11. appveyor.yml
  12. AUTHORS
  13. CONTRIBUTING.md
  14. ISSUE_TEMPLATE.md
  15. LICENSE
  16. README.md
  17. VERSION
README.md

Flutter

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Flutter is a new way to build high-performance, cross-platform mobile apps. Flutter is optimized for today‘s, and tomorrow’s, mobile devices. We are focused on low-latency input and high frame rates on Android and iOS.

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