Localization and Accessibility on iOS
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This document discusses localization and accessibility in iOS apps. Localization allows apps to support multiple languages by extracting strings from code into language-specific files. Accessibility makes apps usable for those with disabilities through features like labels, hints and traits. Xcode provides tools to help developers implement localization with strings files and storyboards, as well as test and deploy their localized apps.
Localization and Accessibility on iOS
- 3. AGENDA Localizing Strings Localizing Storyboards Testing Localization Locales Accessibility
- 5. LOCALIZING STRINGS Requires developer to use specific API to retrieve strings in code Additionally need .strings file with translation for each language
- 6. ADDING LOCALIZED STRINGS TO YOUR PROJECT - 1 Generate a localized strings file using the following command: find . -name *.swift | xargs genstrings -o . Searches for all occurrences of NSLocalizedString and extracts keys and comments into a separate file
- 7. ADDING LOCALIZED STRINGS TO YOUR PROJECT - 2 Add the Localizable.strings file to your project:
- 8. ADDING LOCALIZED STRINGS TO YOUR PROJECT - 3 Add a new language to your project:
- 9. ADDING LOCALIZED STRINGS TO YOUR PROJECT - 4 Add a new localization to your Localizable.strings file:
- 10. LOCALIZING STRINGS IN CODE // Shortest version of NSLocalizedString; comment is used to inform translator // about the role of this string mainLabel.text = NSLocalizedString("com.makeschool.helloString", comment: "The string that greets the user") // Longest version of NSLocalizedString; You can choose which strings file from which // bundle you want to use. You can also provide a default translation value in case // the key cannot be found in the table mainLabel.text = NSLocalizedString("com.makeschool.helloString", tableName: "Other", bundle: NSBundle.mainBundle(), value: "Hello World", comment: "The string that greets the user")
- 17. LOCALES
- 18. LOCALES Besides the language, the region we live in influences localization Examples: Date formatting, currency symbols, time zones
- 19. LOCALES dateLabel.text = NSDateFormatter.localizedStringFromDate(NSDate(), dateStyle: .MediumStyle, timeStyle: .MediumStyle) 23.10.2015, 08:35:31 Oct 23, 2015, 8:26:12 AM German Locale (de-DE) US Locale (en-US)
- 20. ACCESSIBILITY
- 21. ACCESSIBILITY Very important when building custom views! They are not accessible by default: self.isAccessibilityElement = true Can enhance standard view components by providing hints, labels, traits and values
- 22. ACCESSIBILITY accessibilityLabel short description of the control, e.g. “Save” for button, “Rating” for label accessibilityHint helps the user to understand results of an action. E.g. “Saves the Document”, “Clears the text”
- 23. ACCESSIBILITY accessibilityTraits collection of constants that describe the type of control and/or how it should be treated, e.g: UIAccessibilityTraitImage, UIAccessibilityTraitNotEnabled, etc. accessibilityValue Used to describe the value of a none-label UI component. E.g. “50%” for a progress bar. “9 out of 10” for a rating view.
- 24. ACCESSIBILITY Accessibility parameters can be defined in Interface Builder and in code!
- 25. SUMMARY
- 26. SUMMARY Localization and Accessibility are important to make your app available to a broader audience Xcode / iOS provide tooling that allow you to implement localization and accessibility with very little effort
- 28. ADDITIONAL RESOURCES Apple: Internationalization and Localization Guide Apple: Formatting Data Using the Locale Setting AltConf Talk: Localization on iOS Apple: Accessibility Programming Guide for iOS UIAccessibility Class Reference