Callkit
Implement VoIP calling with CallKit and PushKit.
Install
npx skills add dpearson2699/swift-ios-skills --skill callkit -g -a claude-code -y- Repository
- dpearson2699/swift-ios-skills1.3k
- Category
- Media
- Updated
- 3mo ago
- License
- See repository
- Context cost
- Mediumabout 3,000 tokens
- Runs scripts
- No, instructions only
What it does
Implement VoIP calling with CallKit and PushKit. Use when building incoming/outgoing call flows, registering for VoIP push notifications, configuring CXProvider and CXCallController, handling call actions, coordinating audio sessions, or creating Call Directory extensions for caller ID and call blocking.
CallKit
Build VoIP calling features that integrate with the native iOS call UI using CallKit and PushKit. Covers incoming/outgoing call flows, VoIP push registration, audio session coordination, and call directory extensions.
Contents
- Setup
- Provider Configuration
- Incoming Call Flow
- Outgoing Call Flow
- PushKit VoIP Registration
- Audio Session Coordination
- Call Directory Extension and Manager
- Common Mistakes
- Review Checklist
- References
Setup
Project Configuration
- Enable the Voice over IP background mode in Signing & Capabilities
- Add the Push Notifications capability
- For call directory extensions, add a Call Directory Extension target
Key Types
| Type | Role |
|---|---|
CXProvider | Reports calls to the system, receives call actions |
CXCallController | Requests call actions (start, end, hold, mute) |
CXCallUpdate | Describes call metadata (caller name, video, handle) |
CXProviderDelegate | Handles system call actions and audio session events |
PKPushRegistry | Registers for and receives VoIP push notifications |
PKVoIPPushMetadata | iOS 26.4+ metadata that says whether a VoIP push must be reported |
Provider Configuration
Create a single CXProvider at app launch and keep it alive for the app
lifetime. Configure it with a CXProviderConfiguration that describes your
calling capabilities.
import CallKit
