Linphone is an open source softphone for voice and video over IP calling and instant messaging. It is fully SIP-based, for all calling, presence and IM features.
General description is available from linphone web site

License

Copyright © Belledonne Communications

Linphone is dual licensed, and is available either :
- under a GNU/GPLv3 license, for free (open source). Please make sure that you understand and agree with the terms of this license before using it (see LICENSE file for details).
- under a proprietary license, for a fee, to be used in closed source applications. Contact Belledonne Communications for any question about costs and services.

Documentation

• Supported features and RFCs : https://www.linphone.org/technical-corner/linphone/features
• Linphone public wiki : https://wiki.linphone.org/xwiki/wiki/public/view/Linphone/

How can I contribute?

Thanks for asking! We love pull requests from everyone. Depending on what you want to do, you can help us improve Linphone in
various ways:

Help on translations

We no longer use transifex for the translation process, instead we have deployed our own instance of Weblate.

Due to the full app rewrite we can't re-use previous translations, so we'll be very happy if you want to contribute.

Report bugs and submit patchs

If you want to dig through Linphone code or report a bug, please read CONTRIBUTING.md first. You should also read this README entirely ;-).

How to be a beta tester ?

Enter the Beta :
- Download TestFlight from the App Store and log in it with your apple-id
-Tap the public link on your iOS device. The public link : https://testflight.apple.com/join/LUlmZWjH
-Touch View in TestFlight or Start Testing. You can also touch Accept, Install, or Update for Linphone app.
-And voilà ! You can update your beta version with the same public link when a new one is available

Send a crash report :
- It is done automatically by TestFlight

Report a bug :
- Open Linphone
- Go to Settings —> Advanced —> Send logs
- An email to linphone-iphone@belledonne-communications.com is created with your logs attached
- Fill in the bug description with :
* What you were doing
* What happened
* What you were expecting
* Approximately when the bug happened
- Change the object to [Beta test - Bug report]
- Send the mail

Building the application

What's new

Now the default way of building linphone-iphone is to use CocoaPods to retrieve the linphone-sdk frameworks.
Compared to previous versions, this project no longer uses submodules developper has to build in order to get a working app.
However, if you wish to use a locally compiled SDK, read paragraph "Using a local linphone SDK" below to know how to proceed.

Building the app

If you don't have CocoaPods already, you can download and install it using :
sudo gem install cocoapods
If you alreadly have Cocoapods, make sur that the version is higher than 1.7.5.

• Install the app's dependencies with cocoapods first:
  pod install
  It will download the linphone-sdk from our gitlab repository so you don't have to build anything yourself.
• Then open linphone.xcworkspace file (**NOT linphone.xcodeproj**) with XCode to build and run the app.

Limitations and known bugs

• Video capture will not work in simulator (not implemented in it).

Using a local linphone SDK

• Clone the linphone-sdk repository from out gitlab:
  git clone https://gitlab.linphone.org/BC/public/linphone-sdk.git --recursive

• Follow the instructions in the linphone-sdk/README file to build the SDK.

• Rebuild the project:
  PODFILE_PATH=<path to linphone-sdk-ios> pod install
  where is your build directory of the linphone-sdk project, containing the linphone-sdk.podspec file and a linphone-sdk ouptut directory comprising built frameworks and resources.

• Then open linphone.xcworkspace with Xcode to build and run the app.

Enabling crashlytics

We've integrated Crashlytics into liphone-iphone, which can automatically send crash reports. It is disabled by default.
To activate it:

• Replace the GoogleService-Info.plist for this project with yours (specific to your crashlytics account).

• Rebuild the project:
  USE_CRASHLYTICS=true pod install

• Then open linphone.xcworkspace with Xcode to build and run the app.

Quick UI reference

• The app is contained in a window, which resides in the MainStoryboard file.
• The delegate is set to LinphoneAppDelegate in main.m, in the UIApplicationMain() by passing its class

• Basic layout:

  MainStoryboard
          |
          | (rootViewController)
          |
      PhoneMainView ---> view |--> app background
          |                   |
          |                   |--> statusbar background
          |
          | (mainViewController)
          |
      UICompositeView : TPMultilayout
                  |
                  |---> view  |--> statusBar
                              |
                              |--> contentView
                              |
                              |--> tabBar
  

When the application is started, the phoneMainView gets asked to transition to the Dialer view or the Assistant view.
PhoneMainView exposes the -changeCurrentView: method, which will setup its
Any Linphone view is actually presented in the UICompositeView, with or without a statusBar and tabBar.

The UICompositeView consists of 3 areas laid out vertically. From top to bottom: StatusBar, Content and TabBar.
The TabBar is usually the UIMainBar, which is used as a navigation controller: clicking on each of the buttons will trigger
a transition to another "view".