Customization

We provide customization options, including localisation support, configurable fonts and colors.

Localization

Localization of messages and errors is supported using a String Catalog. The comprehensive list of localised keys is provided below:

Key	English (en)	Comment
ozone_nfc_authentication	Authentication	A section title for authentication details in the NFC result view.
ozone_nfc_error	Error	The title of an alert that appears when an error occurs.
ozone_nfc_error_invalid_nfc_key_formatting	Invalid NFC Key Formatting	An error message displayed when the NFC key formatting is invalid.
ozone_nfc_error_invalid_nfc_tag	Invalid NFC Tag	An error message displayed when the NFC tag is invalid.
ozone_nfc_error_unexpected_error	Unexpected error	An error message displayed when there is an unexpected error.
ozone_nfc_error_user_cancelled	User cancelled	An error message displayed when the user has cancelled the process.
ozone_nfc_failed	Failed	A label that indicates whether the BAC authentication was successful or not.
ozone_nfc_instruction_different_page_subtitle	If you are struggling to scan the NFC chip. Try scanning the front, middle, photo page or inner back pages of your document.	A label that instructs the user to try different pages of their passport (subtitle).
ozone_nfc_instruction_different_page_title	Try a different page	A label that instructs the user to try different pages of their passport (title).
ozone_nfc_instruction_hold_still_subtitle	When the dots are progressing, the phone is scanning the document. Hold the phone and document still.	A label that instructs the user to hold their phone still while scanning (subtitle).
ozone_nfc_instruction_hold_still_title	Hold phone and document still	A label that instructs the user to hold their phone still while scanning (title).
ozone_nfc_instruction_page_title	How to scan the NFC chip	A label that shows the title of the instructions page.
ozone_nfc_instruction_remove_subtitle	Remove any covers or sleeves from your document.	A label that instructs the user to remove any document covers (subtitle).
ozone_nfc_instruction_remove_title	Remove any document covers	A label that instructs the user to remove any document covers (title).
ozone_nfc_instruction_slide_subtitle	Slide your phone slowly up and down the document until you see the dots progress.	A label that instructs the user to slide the phone to find the NFC chip (subtitle).
ozone_nfc_instruction_slide_title	Slide phone up and down	A label that instructs the user to slide the phone to find the NFC chip (title).
ozone_nfc_instruction_touch_subtitle	Make sure the back of your phone and document are touching.	A label that instructs the user to touch the phone and document together (subtitle).
ozone_nfc_instruction_touch_title	Touch phone against document	A label that instructs the user to touch the phone and document together (title).
ozone_nfc_no	No	A response indicating that the passport data is valid.
ozone_nfc_passport_number	Passport Number	A label for the passport number field.
ozone_nfc_scan_state_authenticating	Authenticating	A string to indicate that the status of the users scan is authenticating.
ozone_nfc_scan_state_authenticating_with_passport	Authenticating with passport	A string to indicate that the status of the users scan is authenticating with passport.
ozone_nfc_scan_state_connection_error_try_again	Connection error. Please try again.	A string to indicate that the status of the users scan had a problem with the connection and the user should try again.
ozone_nfc_scan_state_hold_phone_near_nfc_passport	Hold your iPhone near an NFC enabled passport.	A string to indicate that the status of the users scan hasn’t started and the user should hold their phone near an NFC enabled passport.
ozone_nfc_scan_state_more_than_one_tag_found	More than 1 tags was found. Please present only 1 tag.	A string to indicate that the status of the users scan has found more than one tag.
ozone_nfc_scan_state_mrz_key_not_valid	MRZ Key not valid for this document.	A string to indicate that the status of the users scan has encountered problem with the MRZ key.
ozone_nfc_scan_state_passport_read_successfully	Passport read successfully	A string to indicate that the status of the users scan has been successful.
ozone_nfc_scan_state_problem_reading_passport	Sorry, there was a problem reading the passport.	A string to indicate that the status of the users scan has been unsuccessful.
ozone_nfc_scan_state_problem_reading_passport_try_again	Sorry, there was a problem reading the passport. Please try again.	A string to indicate that the status of the users scan has been unsuccessful and to try again.
ozone_nfc_scan_state_reading	Reading	A string to indicate that the status of the users scan is reading the document.
ozone_nfc_scan_state_tag_not_valid	Tag not valid.	A string to indicate that the status of the users scan has encountered an invalid tag.
ozone_nfc_start_scanning	Start scanning	A button which allows the user to start scanning.
ozone_nfc_succeeded	Succeeded	A label that indicates whether the BAC authentication was successful or not.
ozone_nfc_yes	Yes	A positive response to a boolean question.

How to Integrate

1. Add a string catalog to your project.
2. Include the keys listed above.
3. Customise the message.
4. Add additional languages.
5. Introduce the translated copy for each key.
6. Register your bundle with the SDK so it uses your catalog instead of the built-in defaults:

OzoneNFCUIAppearance.shared.customBundle = Bundle.main

4. If your catalog uses a non-default name, set customStringTableName to match:

OzoneNFCUIAppearance.shared.customStringTableName = "MyStrings"

5. Add an additional string catalog named InfoPlist.xcstrings to your project to localize the Info.plist file of your project.
6. Add a key named NSCameraUsageDescription to customize the camera permission request message.

Font Customisation

Ozone NFC provides flexible options for customising the typeface, size, and colour of all text elements within the interface.

If you need guidance on integrating custom fonts into your app, refer to Apple’s documentation: Adding a Custom Font to Your App.

Typefaces and Sizes:

The following text elements support custom typefaces and font sizes:

Label Type	Attribute	Example
Title	titleFont	"How to scan the NFC chip"
Header	headerFont	"Touch phone against document"
Paragraph	paragraphFont	"Make sure the back of your phone and document are touching."
Button	buttonFont	"Start scanning"

Button sizing can also be customised:

Attribute	Description
buttonTextSize	Font size for button labels
buttonBorderRadius	Corner radius of buttons
buttonBorderWidth	Width of button borders

The following colour values can be customised to match your app’s visual identity:

Type	Attribute	Default Value
Title Text	titleColor	#000000
Header Text	headerColor	#000000
Paragraph	paragraphColor	#000000
View Controller Background	backgroundColor	#FFFFFF
Primary Button Background	primaryButtonColor	#00326480
Primary Button Background (Pressed)	primaryButtonPressedColor	#003264CC
Primary Button Text	primaryButtonTextColor	#FFFFFF
Primary Button Text (Pressed)	primaryButtonPressedTextColor	#FFFFFF
Primary Button Border	primaryButtonBorderColor	#003264
Primary Button Border (Pressed)	primaryButtonPressedBorderColor	#003264CC

Examples

Setting a custom title font:

let size: CGFloat = UIFont.preferredFont(forTextStyle: .title3).pointSize
let customFont: UIFont = UIFont(name: "Custom-Font", size: size)
OzoneNFCUIAppearance.shared.titleFont = customFont

Updating the Primary Button background colour:

OzoneNFCUIAppearance.shared.set(.primaryButtonColor, uiColor: .red)