iOS: Fix runtime error in AppRTCMobile

bugFix: `poping-up` alert message before `hanging-up` will result in runtime assertation as:
[Assert] Trying to dismiss the presentation controller while transitioning already.
Warning: Attempt to dismiss from view controller <UINavigationController: 0x13081e200> while a presentation or dismiss is in progress!
[Assert] transitionViewForCurrentTransition is not set, presentation controller was dismissed during the presentation? (<_UIAlertControllerAlertPresentationController: 0x12fd57bf0>)

BUG=webrtc:7569

Review-Url: https://codereview.webrtc.org/2863473005
Cr-Commit-Position: refs/heads/master@{#18190}
1 file changed
tree: db067d3f614bccd1896eb29354280b3066129b4e
  1. build_overrides/
  2. data/
  3. infra/
  4. resources/
  5. tools_webrtc/
  6. webrtc/
  7. .clang-format
  8. .git-blame-ignore-revs
  9. .gitignore
  10. .gn
  11. AUTHORS
  12. BUILD.gn
  13. check_root_dir.py
  14. cleanup_links.py
  15. CODE_OF_CONDUCT.md
  16. codereview.settings
  17. DEPS
  18. LICENSE
  19. license_template.txt
  20. LICENSE_THIRD_PARTY
  21. OWNERS
  22. PATENTS
  23. PRESUBMIT.py
  24. pylintrc
  25. README.md
  26. WATCHLISTS
README.md

WebRTC is a free, open software project that provides browsers and mobile applications with Real-Time Communications (RTC) capabilities via simple APIs. The WebRTC components have been optimized to best serve this purpose.

Our mission: To enable rich, high-quality RTC applications to be developed for the browser, mobile platforms, and IoT devices, and allow them all to communicate via a common set of protocols.

The WebRTC initiative is a project supported by Google, Mozilla and Opera, amongst others.

Development

See http://www.webrtc.org/native-code/development for instructions on how to get started developing with the native code.

More info