如何使用 @shopify/restyle 在 React Native 中建立類型強制的 UI 元件

自從我在部落格上寫一篇技術文章以來已經有一段時間了，這是一篇關於使用 @shopify/restyle 和 expo 在 React Native 中建立類型強制 UI 元件的新文章。

@shopify/restyle 是一個強大的 React Native 樣式庫，可為您的 UI 元件帶來類型安全性和一致性。與傳統的樣式方法不同，Restyle 可讓您建立集中式主題配置，在整個應用程式中強制執行設計系統原則。

入門

項目設定

• 使用 expo 設定您的 React Native 項目

npx create-expo-app@latest

• 前往您的專案目錄並使用 expo 安裝 @shopify/restyle 套件

cd /path/to/project
npx expo install @shopify/restyle

創建你的主題

建立 theme.tsx 檔案來定義您的設計系統：

touch theme.tsx

• 複製並貼上預設主題配置

import {createTheme} from '@shopify/restyle';

const palette = {
  purpleLight: '#8C6FF7',
  purplePrimary: '#5A31F4',
  purpleDark: '#3F22AB',

  greenLight: '#56DCBA',
  greenPrimary: '#0ECD9D',
  greenDark: '#0A906E',

  black: '#0B0B0B',
  white: '#F0F2F3',
};

const theme = createTheme({
  colors: {
    mainBackground: palette.white,
    cardPrimaryBackground: palette.purplePrimary,
  },
  spacing: {
    s: 8,
    m: 16,
    l: 24,
    xl: 40,
  },
  textVariants: {
    header: {
      fontWeight: 'bold',
      fontSize: 34,
    },
    body: {
      fontSize: 16,
      lineHeight: 24,
    },
    defaults: {
      // We can define a default text variant here.
    },
  },
});

export type Theme = typeof theme;
export default theme;

實施主題提供者

更新您的 app/_layout.tsx：

import { DarkTheme, DefaultTheme } from "@react-navigation/native";
import { useFonts } from "expo-font";
import { Stack } from "expo-router";
import * as SplashScreen from "expo-splash-screen";
import { StatusBar } from "expo-status-bar";
import { useEffect } from "react";
import "react-native-reanimated";

import { ThemeProvider } from "@shopify/restyle";
import theme from "@/theme";

// Prevent the splash screen from auto-hiding before asset loading is complete.
SplashScreen.preventAutoHideAsync();

export default function RootLayout() {
  const [loaded] = useFonts({
    SpaceMono: require("../assets/fonts/SpaceMono-Regular.ttf"),
  });

  useEffect(() => {
    if (loaded) {
      SplashScreen.hideAsync();
    }
  }, [loaded]);

  if (!loaded) {
    return null;
  }

  return (
    <ThemeProvider theme={theme}>
      <Stack>
        <Stack.Screen name="(tabs)" options={{ headerShown: false }} />
        <Stack.Screen name="+not-found" />
      </Stack>
      <StatusBar>



<h2>
  
  
  Creating Reusable Components
</h2>

<h3>
  
  
  Text Component
</h3>



<pre class="brush:php;toolbar:false">touch components/Text.tsx

// In components/Text.tsx

import {createText} from '@shopify/restyle';
import {Theme} from '../theme';

export const Text = createText<Theme>();

讓我們在主螢幕上使用它

import { Text } from "@/components/Text";
import { SafeAreaView } from "react-native-safe-area-context";

export default function HomeScreen() {
  return (
    <SafeAreaView>
      <Text margin="m" variant="header">
        This is the Home screen. Built using @shopify/restyle.
      </Text>
    </SafeAreaView>
  );
}

正如您在上面的程式碼中看到的，我們將邊距作為“m”而不是數字傳遞。我們從 theme.tsxfile 中取得值。

// ./theme.tsx

const theme = createTheme({
  spacing: {
    s: 8,
    m: 16, // margin="m"
    l: 24,
    xl: 40,
  },
  textVariants: {
    header: { // our text header variant
      fontWeight: 'bold',
      fontSize: 34,
    },
    body: {
      fontSize: 16,
      lineHeight: 24,
    },
  },
    // ...rest of code
  },
});

這就是我們的主頁視圖的外觀

骨架裝載機組件

讓我們建造一張骨架裝載機卡

touch components/SkeletonLoader.tsx

// components/SkeletonLoader.tsx

import {
  BackgroundColorProps,
  createBox,
  createRestyleComponent,
  createVariant,
  spacing,
  SpacingProps,
  VariantProps,
} from "@shopify/restyle";
import { Theme } from "@/theme";
import { View } from "react-native";

const Box = createBox<Theme>();

type Props = SpacingProps<Theme> &
  VariantProps<Theme, "cardVariants"> &
  BackgroundColorProps<Theme> &
  React.ComponentProps<typeof View>;

const CardSkeleton = createRestyleComponent<Props, Theme>([
  spacing,
  createVariant({ themeKey: "cardVariants" }),
]);

const SkeletonLoader = () => {
  return (
    <CardSkeleton variant="elevated">
      <Box
        backgroundColor="cardPrimaryBackground"
        height={20}
        marginBottom="s"
        width="70%"
        overflow="hidden"
        borderRadius={"m"}
      >
      </Box>

      <Box
        backgroundColor="cardPrimaryBackground"
        height={100}
        marginBottom="s"
        width="90%"
        overflow="hidden"
        borderRadius={"m"}
      >
      </Box>
      <Box
        backgroundColor="cardPrimaryBackground"
        height={50}
        marginBottom="s"
        width="70%"
        overflow="hidden"
        borderRadius={"m"}
      >
      </Box>
    </CardSkeleton>
  );
};

export default SkeletonLoader;

• 我們從 @shopify/restyle 套件中建立一個新框作為預定義元件，這將是我們創建骨架框的方式

const Box = createBox<Theme>();

• 使用createStyleComponent建立一個新的CardSkeleton元件來建立自訂元件，我們傳遞了必須在theme.tsx檔案中定義的間距和cardVariants的道具

type Props = SpacingProps<Theme> &
  VariantProps<Theme, "cardVariants"> &
  BackgroundColorProps<Theme> &
  React.ComponentProps<typeof View>;

const CardSkeleton = createRestyleComponent<Props, Theme>([
  spacing,
  createVariant({ themeKey: "cardVariants" }),
]);

• 建立一個 SkeletonLoader 元件來渲染我們的 Skelton Card 元件

// components/SkeletonLoader.tsx

export const SkeletonLoader = () => {
  return (
    <CardSkeleton variant="elevated">
      <Box
        backgroundColor="cardPrimaryBackground"
        height={20}
        marginBottom="s"
        width="70%"
        overflow="hidden"
        borderRadius={"m"}
      ></Box>

      <Box
        backgroundColor="cardPrimaryBackground"
        height={100}
        marginBottom="s"
        width="90%"
        overflow="hidden"
        borderRadius={"m"}
      ></Box>
      <Box
        backgroundColor="cardPrimaryBackground"
        height={50}
        marginBottom="s"
        width="70%"
        overflow="hidden"
        borderRadius={"m"}
      ></Box>
    </CardSkeleton>
  );
};

我們還剩下一件事要使其正常工作，更新 theme.tsx 檔案以擁有 cardVariants

const theme = createTheme({
  colors: {
    // Add Black Color to use it later on
    black: palette.black,
  },
  // Add Border Radius Variants
  borderRadii: {
    s: 4,
    m: 10,
    l: 25,
    xl: 75,
  },
  // Add Card Variants
  cardVariants: {
    elevated: {
      shadowColor: "black",
      shadowOffset: { width: 0, height: 2 },
      shadowOpacity: 0.1,
      shadowRadius: 4,
      elevation: 3,
      borderRadius: "m",
    },
    defaults: {
      padding: "m",
      borderRadius: "m",
    },
  },
});

太棒了，但是讓我們為我們的組件添加動畫

// components/SkeletonLoader.tsx

const ShimmerAnimation = () => {
  const shimmerTranslate = useRef(new Animated.Value(0)).current;

  useEffect(() => {
    Animated.loop(
      Animated.timing(shimmerTranslate, {
        toValue: 1,
        duration: 1500,
        useNativeDriver: true,
      })
    ).start();
  }, [shimmerTranslate]);

  const translateX = shimmerTranslate.interpolate({
    inputRange: [0, 1],
    outputRange: [-300, 300],
  });

  return (
    <Animated.View
     >



<p>and let’s use it in our Skeleton Loader Component<br>
</p>

<pre class="brush:php;toolbar:false">// components/SkeletonLoader.tsx

export const SkeletonLoader = () => {
  return (
    <CardSkeleton variant="elevated">
      <Box
        backgroundColor="cardPrimaryBackground"
        height={20}
        marginBottom="s"
        width="70%"
        overflow="hidden"
        borderRadius={"m"}
      >
        <ShimmerAnimation />
      </Box>

      <Box
        backgroundColor="cardPrimaryBackground"
        height={100}
        marginBottom="s"
        width="90%"
        overflow="hidden"
        borderRadius={"m"}
      >
        <ShimmerAnimation />
      </Box>
      <Box
        backgroundColor="cardPrimaryBackground"
        height={50}
        marginBottom="s"
        width="70%"
        overflow="hidden"
        borderRadius={"m"}
      >
        <ShimmerAnimation />
      </Box>
    </CardSkeleton>
  );
};

這是完整的組件程式碼：

// components/SkeletonLoader.tsx

import { useEffect, useRef } from "react";
import { Animated } from "react-native";
import {
  BackgroundColorProps,
  createBox,
  createRestyleComponent,
  createVariant,
  spacing,
  SpacingProps,
  VariantProps,
} from "@shopify/restyle";
import { Theme } from "@/theme";
import { View } from "react-native";

const Box = createBox<Theme>();

const ShimmerAnimation = () => {
  const shimmerTranslate = useRef(new Animated.Value(0)).current;

  useEffect(() => {
    Animated.loop(
      Animated.timing(shimmerTranslate, {
        toValue: 1,
        duration: 1500,
        useNativeDriver: true,
      })
    ).start();
  }, [shimmerTranslate]);

  const translateX = shimmerTranslate.interpolate({
    inputRange: [0, 1],
    outputRange: [-300, 300],
  });

  return (
    



Et voila, we made a skeleton loader card using @shopify/restyle using 




  
  
  Support for dark mode


Let’s start with adding dark theme configuration, in your theme.tsxfile



// theme.tsx

export const darkTheme: Theme = {
  ...theme,
  colors: {
    ...theme.colors,
    mainBackground: palette.white,
    cardPrimaryBackground: palette.purpleDark,
    greenPrimary: palette.purpleLight,
  },
  textVariants: {
    ...theme.textVariants,
    defaults: {
      ...theme.textVariants.header,
      color: palette.purpleDark,
    },
  },




透過將深色主題配置新增至我們的layout.tsx 檔案中來將其新增至我們的應用程式佈局

npx create-expo-app@latest

• 基於顏色模式，使用預設的淺色主題或在深色模式下使用 theme.tsx 檔案中定義的 darkTheme 配置

 // app/_layout.tsx

 從“@/theme”導入主題，{ darkTheme }；

 //...其餘程式碼

    <themeprovider>
      
        <stack.screen name="(tabs)" options="{{" headershown: false></stack.screen> >
        <stack.screen name="未找到"></stack.screen>
      堆疊>
      



<p>這是深色和淺色模式。 </p>

<p><img src="https://img.php.cn/upload/article/000/000/000/173310152340178.jpg" alt="How to build type-enforced UI components in React Native using @shopify/restyle"></p>

<p><img src="https://img.php.cn/upload/article/000/000/000/173310152557660.jpg" alt="How to build type-enforced UI components in React Native using @shopify/restyle"></p>

<p>瞧，我們成功地使用 @shopify/restyle 套件創建了類型強制的 UI 元件</p>

<p>謝謝你:)</p>


          

            
        </themeprovider>

以上是如何使用 @shopify/restyle 在 React Native 中建立類型強制的 UI 元件的詳細內容。更多資訊請關注PHP中文網其他相關文章！