Outgoing Call - CometChat Docs

The CometChatOutgoingCall component is a visual representation of a user-initiated call, whether voice or video. It serves as an interface for managing outgoing calls, providing users with essential options to control the call experience.

AI Integration Quick Reference

{
  "component": "CometChatOutgoingCall",
  "package": "CometChatUIKitSwift",
  "import": "import CometChatUIKitSwift\nimport CometChatSDK",
  "description": "Displays outgoing call interface while waiting for recipient to answer",
  "inherits": "UIViewController",
  "primaryOutput": {
    "callback": "onCancelClick",
    "type": "(Call, UIViewController) -> Void"
  },
  "props": {
    "data": {
      "call": { "type": "Call", "required": true }
    },
    "callbacks": {
      "onCancelClick": "(Call, UIViewController) -> Void",
      "onError": "(CometChatException) -> Void"
    },
    "sound": {
      "disableSoundForCalls": { "type": "Bool", "default": false },
      "customSoundForCalls": { "type": "URL?", "default": "nil" }
    },
    "viewSlots": {
      "listItemView": "(Call) -> UIView",
      "leadingView": "(Call) -> UIView",
      "titleView": "(Call) -> UIView"
    }
  },
  "events": [
    { "name": "onOutgoingCallAccepted", "payload": "Call", "description": "Fires when outgoing call is accepted" },
    { "name": "onOutgoingCallRejected", "payload": "Call", "description": "Fires when outgoing call is rejected" }
  ],
  "sdkListeners": [],
  "compositionExample": {
    "description": "OutgoingCall is presented when user initiates a call",
    "components": ["CometChatCallButtons", "CometChatOutgoingCall", "CometChatOngoingCall"],
    "flow": "User taps call → OutgoingCall shown → Recipient answers → OngoingCall starts"
  }
}

Field	Value
Component	`CometChatOutgoingCall`
Package	`CometChatUIKitSwift`
Inherits	`UIViewController`

Usage

Integration

CometChatOutgoingCall is a custom view controller that offers versatility in its integration. It can be seamlessly launched via button clicks or any user-triggered action, enhancing the overall user experience and facilitating smoother interactions within the application.

Swift

let cometChatOutgoingCall = CometChatOutgoingCall()
cometChatOutgoingCall.set(call: call)

cometChatOutgoingCall.modalPresentationStyle = .fullScreen
self.present(cometChatOutgoingCall, animated: true)

If you are already using a navigation controller, you can use the pushViewController function instead of presenting the view controller.

Actions

Actions dictate how a component functions. They are divided into two types: Predefined and User-defined. You can override either type, allowing you to tailor the behavior of the component to fit your specific needs.

1. SetOnCancelClick

The setOnCancelClick action is typically triggered when the call is canceled, carrying out default actions. You can customize or override this default behavior using the following code snippet:

Swift

let cometChatOutgoingCall = CometChatOutgoingCall()
cometChatOutgoingCall.set(onCancelClick: { call, controller in
    // Perform your action
})

2. OnError

You can customize error handling behavior by using the provided code snippet to override the onError callback:

Swift

let incomingCallConfiguration = CometChatOutgoingCall()
.set(onError: { error in
    // Perform your action
})

Filters

Filters allow you to customize the data displayed in a list within a Component. You can filter the list based on your specific criteria for a more customized experience. Filters can be applied using RequestBuilders of the Chat SDK. The OutgoingCall component does not have any exposed filters.

Events

Events are emitted by a Component. By using events, you can extend existing functionality. Being global events, they can be applied in multiple locations and can be added or removed as needed.

Event	Description
onOutgoingCallAccepted	Triggers when the outgoing call is accepted.
onOutgoingCallRejected	Triggers when the outgoing call is rejected.

Add Listener

// View controller from your project where you want to listen to events
public class ViewController: UIViewController {

   public override func viewDidLoad() {
        super.viewDidLoad()

       // Subscribe to the listener for call events
        CometChatCallEvents.addListener("UNIQUE_ID", self as CometChatCallEventListener)
    }
}

// Listener for call events
extension ViewController: CometChatCallEventListener {

    func onOutgoingCallAccepted(call: Call) {
        // Handle call accepted
    }

    func onOutgoingCallRejected(call: Call) {
        // Handle call rejected
    }
}

Emitting Call Events

// Emit this when the other user accepts the call
CometChatCallEvents.emitOnOutgoingCallAccepted(call: Call)

// Emit this when the other user rejects a call
CometChatCallEvents.emitOnOutgoingCallRejected(call: Call)

Remove Listener

public override func viewWillDisappear(_ animated: Bool) {
      // Unsubscribe from the listener
      CometChatCallEvents.removeListener("LISTENER_ID_USED_FOR_ADDING_THIS_LISTENER")
}

Customization

To fit your app’s design requirements, you can customize the appearance of the component. We provide exposed methods that allow you to modify the experience and behavior according to your specific needs.

Style

Using Style, you can customize the look and feel of the component in your app. These parameters typically control elements such as the color, size, shape, and fonts used within the component.

1. OutgoingCall Style

You can customize the appearance of the OutgoingCall Component by applying the OutgoingCallStyle to it. Global level styling

Swift

let customAvatarStyle = AvatarStyle()
customAvatarStyle.backgroundColor = UIColor(hex: "#FBAA75")
customAvatarStyle.cornerRadius = CometChatCornerStyle(cornerRadius: 8)
        
CometChatOutgoingCall.style.nameLabelFont = UIFont(name: "Times-New-Roman", size: 20)
CometChatOutgoingCall.style.callLabelFont = UIFont(name: "Times-New-Roman", size: 14)
CometChatOutgoingCall.style.declineButtonCornerRadius = .init(cornerRadius: 8)
CometChatOutgoingCall.avatarStyle = customAvatarStyle

Instance level styling

Swift

let customAvatarStyle = AvatarStyle()
customAvatarStyle.backgroundColor = UIColor(hex: "#FBAA75")
customAvatarStyle.cornerRadius = CometChatCornerStyle(cornerRadius: 8)
        
let outgoingCallStyle = OutgoingCallStyle()
outgoingCallStyle.nameLabelFont = UIFont(name: "Times-New-Roman", size: 20)
outgoingCallStyle.callLabelFont = UIFont(name: "Times-New-Roman", size: 14)
outgoingCallStyle.declineButtonCornerRadius = .init(cornerRadius: 8)
        
let outgoingCall = CometChatOutgoingCall()
outgoingCall.style = outgoingCallStyle
outgoingCall.avatarStyle = customAvatarStyle

CometChatOutgoingCall with custom styling showing custom fonts and rounded decline button

OutgoingCallStyle Properties

Property	Description	Code
`backgroundColor`	Sets the background color for the outgoing call view.	`CometChatOutgoingCall.style.backgroundColor = UIColor()`
`borderColor`	Sets the border color for the outgoing call view.	`CometChatOutgoingCall.style.borderColor = UIColor.clear`
`borderWidth`	Sets the border width for the outgoing call view.	`CometChatOutgoingCall.style.borderWidth = 0`
`cornerRadius`	Sets the corner radius for the outgoing call view.	`CometChatOutgoingCall.style.cornerRadius = .init(cornerRadius: 0)`
`nameTextColor`	Sets the text color for the name label in the outgoing call view.	`CometChatOutgoingCall.style.nameTextColor = UIColor()`
`nameTextFont`	Sets the font for the name label in the outgoing call view.	`CometChatOutgoingCall.style.nameTextFont = UIFont()`
`callTextColor`	Sets the text color for the call label in the outgoing call view.	`CometChatOutgoingCall.style.callTextColor = UIColor()`
`callTextFont`	Sets the font for the call label in the outgoing call view.	`CometChatOutgoingCall.style.callTextFont = UIFont()`
`declineButtonBackgroundColor`	Sets the background color for the decline button in the outgoing call view.	`CometChatOutgoingCall.style.declineButtonBackgroundColor = UIColor()`
`declineButtonIconTint`	Sets the tint color for the decline button icon.	`CometChatOutgoingCall.style.declineButtonIconTint = UIColor()`
`declineButtonIcon`	Sets the icon for the decline button.	`CometChatOutgoingCall.style.declineButtonIcon = UIImage(systemName: "phone.down.fill")`
`declineButtonCornerRadius`	Sets the corner radius for the decline button.	`CometChatOutgoingCall.style.declineButtonCornerRadius: CometChatCornerStyle?`
`declineButtonBorderColor`	Sets the border color for the decline button.	`CometChatOutgoingCall.style.declineButtonBorderColor: UIColor?`
`declineButtonBorderWidth`	Sets the border width for the decline button.	`CometChatOutgoingCall.style.declineButtonBorderWidth: CGFloat?`

Functionality

These are small functional customizations that allow you to fine-tune the overall experience of the component.

Property	Description	Code
disableSoundForCalls	Disables sound for outgoing calls.	`disableSoundForCalls = true`
setCustomSoundForCalls	Sets a custom sound for outgoing calls.	`set(customSoundForCalls: URL)`

Advanced

For advanced-level customization, you can set custom views to the component. This lets you tailor each aspect of the component to fit your exact needs and application aesthetics. You can create and define your own views, layouts, and UI elements and then incorporate those into the component.

SetAvatarView

With this function, you can assign a custom view to the avatar of the OutgoingCall Component.

Swift

cometChatOutgoingCall.set(avatarView: { call in
    let customView = CustomAvatarView()
    return customView
})

Demonstration

You can create a CustomAvatarView as a custom UIView:

Swift

import UIKit

class CustomAvatarView: UIView {
    
    private let imageView: UIImageView = {
        let imageView = UIImageView(image: UIImage(named: "user_profile")) // Replace with actual image
        imageView.contentMode = .scaleAspectFill
        imageView.layer.cornerRadius = 50
        imageView.layer.masksToBounds = true
        imageView.translatesAutoresizingMaskIntoConstraints = false
        return imageView
    }()
    
    private let badgeView: UIView = {
        let view = UIView()
        view.backgroundColor = .yellow
        view.layer.cornerRadius = 14
        view.translatesAutoresizingMaskIntoConstraints = false
        return view
    }()
    
    private let starIcon: UIImageView = {
        let imageView = UIImageView(image: UIImage(systemName: "star.fill"))
        imageView.tintColor = .white
        imageView.translatesAutoresizingMaskIntoConstraints = false
        return imageView
    }()
    
    override init(frame: CGRect) {
        super.init(frame: frame)
        setupView()
    }
    
    required init?(coder: NSCoder) {
        super.init(coder: coder)
        setupView()
    }
    
    private func setupView() {
        translatesAutoresizingMaskIntoConstraints = false
        
        addSubview(imageView)
        addSubview(badgeView)
        badgeView.addSubview(starIcon)
        
        NSLayoutConstraint.activate([
            imageView.centerXAnchor.constraint(equalTo: centerXAnchor),
            imageView.centerYAnchor.constraint(equalTo: centerYAnchor),
            imageView.widthAnchor.constraint(equalToConstant: 100),
            imageView.heightAnchor.constraint(equalToConstant: 100),
            
            badgeView.trailingAnchor.constraint(equalTo: imageView.trailingAnchor, constant: 5),
            badgeView.bottomAnchor.constraint(equalTo: imageView.bottomAnchor, constant: 5),
            badgeView.widthAnchor.constraint(equalToConstant: 28),
            badgeView.heightAnchor.constraint(equalToConstant: 28),
            
            starIcon.centerXAnchor.constraint(equalTo: badgeView.centerXAnchor),
            starIcon.centerYAnchor.constraint(equalTo: badgeView.centerYAnchor),
            starIcon.widthAnchor.constraint(equalToConstant: 14),
            starIcon.heightAnchor.constraint(equalToConstant: 14)
        ])
    }
}

SetCancelView

You can modify the cancel call view of the Outgoing call component using the property below:

Swift

cometChatOutgoingCall.set(cancelView: { call in
    let view = CustomCancelView()
    return view
})

Demonstration

CometChatOutgoingCall with custom cancel view showing red End Call button with phone icon

You can create a CustomCancelView as a custom UIView:

Swift

import UIKit

class EndCallButton: UIButton {
    
    private let phoneIcon: UIImageView = {
        let imageView = UIImageView(image: UIImage(systemName: "phone.down.fill"))
        imageView.tintColor = .white
        imageView.translatesAutoresizingMaskIntoConstraints = false
        return imageView
    }()
    
    override init(frame: CGRect) {
        super.init(frame: frame)
        setupView()
    }
    
    required init?(coder: NSCoder) {
        super.init(coder: coder)
        setupView()
    }
    
    private func setupView() {
        setTitle("End Call", for: .normal)
        setTitleColor(.white, for: .normal)
        backgroundColor = .red
        layer.cornerRadius = 10
        titleLabel?.font = UIFont.systemFont(ofSize: 18)
        translatesAutoresizingMaskIntoConstraints = false
        
        let stackView = UIStackView(arrangedSubviews: [phoneIcon, titleLabel!])
        stackView.axis = .horizontal
        stackView.spacing = 5
        stackView.alignment = .center
        stackView.translatesAutoresizingMaskIntoConstraints = false
        
        addSubview(stackView)
        
        NSLayoutConstraint.activate([
            stackView.centerXAnchor.constraint(equalTo: centerXAnchor),
            stackView.centerYAnchor.constraint(equalTo: centerYAnchor)
        ])
        
        addTarget(self, action: #selector(endCallTapped), for: .touchUpInside)
    }
    
    @objc private func endCallTapped() {
        print("Call Ended")
    }
}

SetTitleView

You can customize the title view of the outgoing call component using the property below:

Swift

cometChatOutgoingCall.set(titleView: { call in
    let view = CustomTitleView()
    view.configure(call: call)
    return view
})

Demonstration

CometChatOutgoingCall with custom title view showing call initiator and receiver names

You can create a CustomTitleView as a custom UIView:

Swift

import UIKit

class CustomTitleView: UILabel {
    
    override init(frame: CGRect) {
        super.init(frame: frame)
        setupView()
    }
    
    required init?(coder: NSCoder) {
        super.init(coder: coder)
        setupView()
    }
    
    private func setupView() {
        font = UIFont.boldSystemFont(ofSize: 22)
        textAlignment = .center
        translatesAutoresizingMaskIntoConstraints = false
    }

    func configure(call: Call) {
        text = "\(call.callInitiator) <> \(call.receiver)"
    }
}

SetSubtitleView

You can modify the subtitle view of the outgoing call component using the property below:

Swift

cometChatOutgoingCall.set(subtitleView: { call in
    let view = CustomSubtitleView()
    return view
})

Demonstration

CometChatOutgoingCall with custom subtitle view showing phone icon and Calling status text

You can create a CustomSubtitleView as a custom UIView:

Swift

import UIKit

class CustomSubtitleView: UIStackView {
    
    private let phoneIcon: UIImageView = {
        let imageView = UIImageView(image: UIImage(systemName: "phone.fill"))
        imageView.tintColor = .gray
        imageView.translatesAutoresizingMaskIntoConstraints = false
        return imageView
    }()
    
    private let callingLabel: UILabel = {
        let label = UILabel()
        label.text = "Calling..."
        label.textColor = .gray
        label.font = UIFont.systemFont(ofSize: 18)
        label.translatesAutoresizingMaskIntoConstraints = false
        return label
    }()
    
    override init(frame: CGRect) {
        super.init(frame: frame)
        setupView()
    }
    
    required init(coder: NSCoder) {
        super.init(coder: coder)
        setupView()
    }
    
    private func setupView() {
        axis = .horizontal
        spacing = 5
        alignment = .center
        translatesAutoresizingMaskIntoConstraints = false
        
        addArrangedSubview(phoneIcon)
        addArrangedSubview(callingLabel)
    }
}

Props

All props are optional unless noted.

call

The outgoing call object to display.


Type	`Call`
Default	`undefined`

disableSoundForCalls

Disables the outgoing call ringtone.


Type	`Bool`
Default	`false`

customSoundForCalls

Custom sound file URL for outgoing calls.


Type	`URL?`
Default	`nil`

avatarStyle

Customizes the appearance of the recipient’s avatar.


Type	`AvatarStyle`
Default	`AvatarStyle()`

import CometChatUIKitSwift

let customAvatarStyle = AvatarStyle()
customAvatarStyle.backgroundColor = UIColor.systemOrange
customAvatarStyle.cornerRadius = CometChatCornerStyle(cornerRadius: 8)

let outgoingCall = CometChatOutgoingCall()
outgoingCall.avatarStyle = customAvatarStyle

Events

Events emitted by the Outgoing Call component:

Event	Description
`onOutgoingCallAccepted`	Triggers when the outgoing call is accepted by the recipient
`onOutgoingCallRejected`	Triggers when the outgoing call is rejected by the recipient

View Slots

Slot	Signature	Replaces
`avatarView`	`(Call) -> UIView`	Recipient avatar
`cancelView`	`(Call) -> UIView`	Cancel call button
`titleView`	`(Call) -> UIView`	Recipient name
`subtitleView`	`(Call) -> UIView`	”Calling…” text
`leadingView`	`(Call) -> UIView`	Left section
`trailingView`	`(Call) -> UIView`	Right section

leadingView

You can customize the leading view of an outgoing call component using the property below.

Swift

cometChatOutgoingCall.set(leadingView: { call in
    let view = CustomLeadingView()
    return view
})

trailingView

You can customize the trailing view of an outgoing call component using the property below.

Swift

cometChatOutgoingCall.set(trailingView: { call in
    let view = CustomTrailingView()
    return view
})

Common Patterns

Initiate Call and Present Outgoing Screen

Start a call and show the outgoing call interface:

Swift

func initiateCall(to user: User, callType: CometChat.CallType) {
    let call = Call(receiverId: user.uid ?? "", callType: callType, receiverType: .user)
    
    CometChat.initiateCall(call: call) { [weak self] initiatedCall in
        guard let initiatedCall = initiatedCall else { return }
        DispatchQueue.main.async {
            let outgoingCall = CometChatOutgoingCall()
            outgoingCall.set(call: initiatedCall)
            outgoingCall.modalPresentationStyle = .fullScreen
            self?.present(outgoingCall, animated: true)
        }
    } onError: { error in
        print("Call initiation failed: \(error?.errorDescription ?? "")")
    }
}

Handle Call Acceptance and Transition to Ongoing Call

Navigate to ongoing call when the recipient accepts:

Swift

// Subscribe to call events
CometChatCallEvents.addListener("outgoing_call_listener", self as CometChatCallEventListener)

// In CometChatCallEventListener extension
func onOutgoingCallAccepted(call: Call) {
    DispatchQueue.main.async { [weak self] in
        self?.dismiss(animated: false) {
            let ongoingCall = CometChatOngoingCall()
            ongoingCall.set(sessionId: call.sessionId ?? "")
            ongoingCall.modalPresentationStyle = .fullScreen
            self?.present(ongoingCall, animated: true)
        }
    }
}

Custom Cancel Action with Confirmation

Show confirmation before canceling an outgoing call:

Swift

let outgoingCall = CometChatOutgoingCall()
outgoingCall.set(call: call)
outgoingCall.set(onCancelClick: { [weak self] call, controller in
    let alert = UIAlertController(
        title: "Cancel Call",
        message: "Are you sure you want to cancel this call?",
        preferredStyle: .alert
    )
    alert.addAction(UIAlertAction(title: "No", style: .cancel))
    alert.addAction(UIAlertAction(title: "Yes", style: .destructive) { _ in
        CometChat.rejectCall(sessionID: call.sessionId ?? "", status: .cancelled) { _ in
            controller.dismiss(animated: true)
        } onError: { error in
            print("Failed to cancel: \(error?.errorDescription ?? "")")
        }
    })
    controller.present(alert, animated: true)
})

Incoming Call

Display incoming call interface

Ongoing Call

Display active call interface

Call Logs

Display call history

​Usage

​Integration

​Actions

​1. SetOnCancelClick

​2. OnError

​Filters

​Events

​Customization

​Style

​1. OutgoingCall Style

​OutgoingCallStyle Properties

​Functionality

​Advanced

​SetAvatarView

​SetCancelView

​SetTitleView

​SetSubtitleView

​Props

​call

​disableSoundForCalls

​customSoundForCalls

​avatarStyle

​Events

​View Slots

​leadingView

​trailingView

​Common Patterns

​Initiate Call and Present Outgoing Screen

​Handle Call Acceptance and Transition to Ongoing Call

​Custom Cancel Action with Confirmation

​Related Components

Incoming Call

Ongoing Call

Call Logs

Usage

Integration

Actions

1. SetOnCancelClick

2. OnError

Filters

Events

Customization

Style

1. OutgoingCall Style

OutgoingCallStyle Properties

Functionality

Advanced

SetAvatarView

SetCancelView

SetTitleView

SetSubtitleView

Props

call

disableSoundForCalls

customSoundForCalls

avatarStyle

Events

View Slots

leadingView

trailingView

Common Patterns

Initiate Call and Present Outgoing Screen

Handle Call Acceptance and Transition to Ongoing Call

Custom Cancel Action with Confirmation

Related Components