Discover String Catalogs

4:30 - Localizable string

String(localized: "Welcome to WWDC!")

4:42 - Localizable string with default value

String(localized: "WWDC_NOTIFICATION_TITLE",
       defaultValue: "Welcome to WWDC!")

5:05 - Localizable string with comment

String(localized: "Welcome to WWDC!",
       comment: "Notification banner title")

5:22 - Localizable string with table and comment

String(localized: "Welcome to WWDC!",
       table: "WWDCNotifications",
       comment: "Notification banner title")

7:36 - Localizable strings in SwiftUI

// Localizable strings in SwiftUI

struct ContentView: View {
    var body: some View {
        VStack {
            Label("Thanks for shopping with us!", systemImage: "bag")
                .font(.title)

            HStack {
                Button("Clear Cart") { }

                Button("Checkout") { }
            }
        }
    }
}

8:01 - Localizable strings in SwiftUI with LocalizedStringKey

// Localizable strings in SwiftUI

struct ContentView: View {
    var body: some View {
        VStack {
            // init(_ titleKey: LocalizedStringKey, systemImage name: String)
            Label("Thanks for shopping with us!", systemImage: "bag")
                .font(.title)
            
            HStack {
                Button("Clear Cart") { }

                Button("Checkout") { }
            }
        }
    }
}

8:08 - Localizable strings in SwiftUI text view

// Localizable strings in SwiftUI

struct ContentView: View {
    var body: some View {
        VStack {
            Label {
                Text("Thanks for shopping with us!", comment: "Label above checkout button")
            } icon: {
                Image(systemName: "bag")
            }
            .font(.title)
            
            HStack {
                Button("Clear Cart") { }
                Button("Checkout") { }
            }
        }
    }
}

8:16 - Localizable strings in SwiftUI custom view

// Localizable strings in SwiftUI

struct CardView: View {
    let title: LocalizedStringResource
    let subtitle: LocalizedStringResource

    var body: some View {
        ZStack {
            RoundedRectangle(cornerRadius: 10.0)
            VStack {
                Text(title)
                Text(subtitle)
            }
            .padding()
        }
    }
}

CardView(title: "Recent Purchases", subtitle: "Items you’ve ordered in the past week.")

9:03 - Localizable strings in Swift displayed at runtime

// Localizable strings in Swift

import Foundation

func stringsToPresent() -> (String, AttributedString) {
    let deferredString = LocalizedStringResource("Title")
  
    …
  
    return (
        String(localized: deferredString),
        AttributedString(localized: "**Attributed** _Subtitle_")
    )
}

9:44 - Localizable strings in Objective-C

// Localizable strings in Objective-C

#import <Foundation/Foundation.h>

- (NSString *)stringForDisplay {
    return NSLocalizedString(@"Recent Purchases", @"Button Title");
}

#define MyLocalizedString(key, comment) \
    [myBundle localizedStringForKey:key value:nil table:nil]

10:04 - Localizable strings in C

// Localizable strings in C

#include <CoreFoundation/CoreFoundation.h>

CFStringRef stringForDisplay(void) {
    return CFCopyLocalizedString(CFSTR("Recent Purchases"), CFSTR("Button Title"));
}

#define MyLocalizedString(key, comment) \
    CFBundleCopyLocalizedString(myBundle, key, NULL, NULL)

11:23 - App Shortcut phrases

// App Shortcut phrases

struct FoodTruckShortcuts: AppShortcutsProvider {
    static var appShortcuts: [AppShortcut] {
        AppShortcut(
            intent: ShowTopDonutsIntent(),
            phrases: [
                "\(.applicationName) Trends for \(\.$timeframe)",
                "Show trending donuts for \(\.$timeframe) in \(.applicationName)",
                "Give me trends for \(\.$timeframe) in \(.applicationName)"
            ]
        )
    }
}

23:53 - Stringsdict in XLIFF

// Stringsdict in XLIFF

<trans-unit id="/%lld Recent Visitors:dict/NSStringLocalizedFormatKey:dict/:string">
    <source>%#@recentVisitors@</source>
    <target>%#@recentVisitors@</target>
</trans-unit>

<trans-unit id="/%lld Recent Visitors:dict/recentVisitors:dict/one:dict/:string">
    <source>%lld Recent Visitor</source>
    <target>%lld Visitante Recente</target>
</trans-unit>

<trans-unit id="/%lld Recent Visitors:dict/recentVisitors:dict/other:dict/:string">
    <source>%lld Recent Visitors</source>
    <target>%lld Visitantes Recentes</target>
</trans-unit>

24:08 - String Catalog in XLIFF

// String Catalog in XLIFF

<trans-unit id="%lld Recent Visitors|==|plural.one">
    <source>%lld Recent Visitor</source>
    <target>%lld Visitante Recente</target>
</trans-unit>

<trans-unit id="%lld Recent Visitors|==|plural.other">
    <source>%lld Recent Visitors</source>
    <target>%lld Visitantes Recentes</target>
</trans-unit>

24:58 - String Catalog variations in XLIFF

// Overriding variation in XLIFF

<trans-unit id="Bird Food Shop|==|device.applewatch">
    <source>Bird Food Shop</source>
    <target>Loja de Comida</target>
</trans-unit>

<trans-unit id="Bird Food Shop|==|device.other">
    <source>Bird Food Shop</source>
    <target>Loja de Comida de Passarinho</target>
</trans-unit>