模板版本：v0.4.0

react-native-quick-base64

本项目基于 react-native-quick-base64 开发。

该第三方库支持直接从 npm 下载，新的包名为：@react-native-ohos/react-native-quick-base64 版本所属关系如下：

1. 安装与使用

进入到工程目录并输入以下命令：

npm

npm install @react-native-ohos/react-native-quick-base64

yarn

yarn add @react-native-ohos/react-native-quick-base64

下面的代码展示了这个库的基本使用场景：

import React from 'react';
import { Text, View, TextInput, ScrollView, StyleSheet, Button } from 'react-native';
import { byteLength, btoa, trimBase64Padding } from 'react-native-quick-base64';

export function QuickBase64Test() {
  // Test string to base64 conversion
  const [textTobase64, onChangeTextToBase64] = React.useState('');
  const [testText, onChangeTestText] = React.useState('');
  const [base64ToTextLength, onChangeBase64TextLength] = React.useState(0);
  const [trimBase64PaddingText, onChangeTrimBase64PaddingText] = React.useState('');

  // Click event: string to base64
  const onPressBtoA = (text: string) => {
    try {
      let b64 = btoa(text);
      console.log(`String to base64 ${b64}`);
      onChangeTextToBase64(b64);
    } catch (e) {
      console.error(`btoa error: ${e}`);
    }
  }

  // Print the length of base64 converted to Uint8Array byte array
  const onPressBase64Length = (text: string) => {
    try {
      console.log(`Print base64 length ${text}`);
      onChangeBase64TextLength(byteLength(text));
    } catch (e) {
      console.error(`byteLength error: ${e}`);
    }
  }

  /* trimBase64Padding: Remove padding characters from Base64 string */
  const onPressTrimBase64Padding = (text: string) => {
    try {
      let trimBase64 = trimBase64Padding(text);
      console.log(`trimBase64Padding ${trimBase64}`);
      onChangeTrimBase64PaddingText(trimBase64);
    } catch (e) {
      console.error(`trimBase64Padding error: ${e}`);
    }
  }

  return (
    <ScrollView>
      <View style={styles.mainContainer}>
        <View>
          <TextInput
            style={{ height: 40, borderColor: '#978081', borderWidth: 1, width: 300, marginBottom: 20, backgroundColor: '#f5f5f5' }}
            onChangeText={(text) => onChangeTestText(text)}
            placeholder="please input test text"
            placeholderTextColor={'#674651'}
            value={testText}
          />
        </View>

        <Text>BtoA Encodes a character string into a Base64 character string.</Text>
        <View style={{ display: 'flex', flexDirection: 'column', marginBottom: 10 }}>
          <Text>test string transform base64, testing the text: {testText}</Text>
          <Button
            title="BtoA"
            onPress={() => { onPressBtoA(testText) }}
          />
          <Text style={{ color: 'green' }}>{(textTobase64)}</Text>
        </View>

        <Text>Takes a base64 string and returns the length of the byte array.</Text>
        <View style={{ display: 'flex', flexDirection: 'column', marginBottom: 10 }}>
          <Text>get Uint8Array length from base64 transform, testing the text: {textTobase64}</Text>
          <Button
            title="base64ToTextLength"
            onPress={() => { onPressBase64Length(textTobase64) }}
          />
          <Text style={{ color: 'green' }}>{(base64ToTextLength)}</Text>
        </View>

        {/* trimBase64Padding: Remove padding characters from Base64 string */}
        <Text>trimBase64Padding.</Text>

        <View style={{ display: 'flex', flexDirection: 'column', marginBottom: 10 }}>
          <Text>trimBase64Padding clears the padding characters of a Base64 string, testing the text: {textTobase64}</Text>
          <Button title="test trimBase64Padding" onPress={() => { onPressTrimBase64Padding(textTobase64) }} />
          <Text style={{ color: 'green' }}>{trimBase64PaddingText}</Text>
        </View>

      </View>
    </ScrollView>
  );
}

const styles = StyleSheet.create({
  mainContainer: {
    flex: 1,
    paddingTop: 20,
    paddingLeft: 20,
    paddingRight: 20,
    paddingBottom: 20,
    backgroundColor: '#f5f5f5',
    color: '#674651',
  },
});

使用 Codegen

本库已经适配了 Codegen ，在使用前需要主动执行生成三方库桥接代码，详细请参考 Codegen 文档。

2. Link

使用AutoLink的工程需要根据该文档配置，Autolink框架指导文档：https://gitcode.com/openharmony-sig/ohos_react_native/blob/master/docs/zh-cn/Autolinking.md

如您使用的版本支持 Autolink，并且工程已接入 Autolink，可跳过ManualLink配置。

{
  ...
  "overrides": {
    "@rnoh/react-native-openharmony" : "./react_native_openharmony"
  }
}

 "dependencies": {
    "@rnoh/react-native-openharmony": "file:../react_native_openharmony",

    "@react-native-ohos/react-native-quick-base64": "file:../../node_modules/@react-native-ohos/react-native-quick-base64/harmony/rn_quick_base64.har"
 }

cd entry
ohpm install

project(rnapp)
cmake_minimum_required(VERSION 3.4.1)
set(CMAKE_SKIP_BUILD_RPATH TRUE)
set(RNOH_APP_DIR "${CMAKE_CURRENT_SOURCE_DIR}")
set(NODE_MODULES "${CMAKE_CURRENT_SOURCE_DIR}/../../../../../node_modules")
+ set(OH_MODULES "${CMAKE_CURRENT_SOURCE_DIR}/../../../oh_modules")
set(RNOH_CPP_DIR "${CMAKE_CURRENT_SOURCE_DIR}/../../../../../../react-native-harmony/harmony/cpp")
set(LOG_VERBOSITY_LEVEL 1)
set(CMAKE_ASM_FLAGS "-Wno-error=unused-command-line-argument -Qunused-arguments")
set(CMAKE_CXX_FLAGS "-fstack-protector-strong -Wl,-z,relro,-z,now,-z,noexecstack -s -fPIE -pie")
set(WITH_HITRACE_SYSTRACE 1) # for other CMakeLists.txt files to use
add_compile_definitions(WITH_HITRACE_SYSTRACE)

add_subdirectory("${RNOH_CPP_DIR}" ./rn)

# RNOH_BEGIN: manual_package_linking_1
add_subdirectory("../../../../sample_package/src/main/cpp" ./sample-package)
+ add_subdirectory("${OH_MODULE_DIR}/@react-native-ohos/react-native-quick-base64/src/main/cpp" ./rn_quick_base64)
# RNOH_END: manual_package_linking_1

file(GLOB GENERATED_CPP_FILES "./generated/*.cpp")

add_library(rnoh_app SHARED
    ${GENERATED_CPP_FILES}
    "./PackageProvider.cpp"
    "${RNOH_CPP_DIR}/RNOHAppNapiBridge.cpp"
)
target_link_libraries(rnoh_app PUBLIC rnoh)

# RNOH_BEGIN: manual_package_linking_2
target_link_libraries(rnoh_app PUBLIC rnoh_sample_package)
+ target_link_libraries(rnoh_app PUBLIC rnoh_quick_base64)
# RNOH_END: manual_package_linking_2

#include "RNOH/PackageProvider.h"
#include "SamplePackage.h"
+ #include "RNQuickBase64Package.h"

using namespace rnoh;

std::vector<std::shared_ptr<Package>> PackageProvider::getPackages(Package::Context ctx) {
    return {
      std::make_shared<SamplePackage>(ctx),
+     std::make_shared<RNQuickBase64Package>(ctx)
    };
}

+ import { RNQuickBase64Package } from '@react-native-ohos/react-native-quick-base64/ts';

export function createRNPackages(ctx: RNPackageContext): RNPackage[] {
  return [
    new SamplePackage(ctx),
+   new RNQuickBase64Package(ctx),
  ];
}

2.5. 运行

点击右上角的 sync 按钮

或者在终端执行：

cd entry
ohpm install

然后编译、运行即可。

3. 约束与限制

3.1. 兼容性

本文档内容基于以下环境验证通过：

1. RNOH: 0.72.96; SDK: HarmonyOS 6.0.0 Release SDK; IDE: DevEco Studio 6.0.0.858; ROM: 6.0.0.112;
2. RNOH: 0.72.33; SDK: HarmonyOS NEXT B1; IDE: DevEco Studio: 5.0.3.900; ROM: Next.0.0.71;
3. RNOH: 0.77.18; SDK: HarmonyOS 6.0.0 Release SDK; IDE: DevEco Studio 6.0.0.858; ROM: 6.0.0.112;
4. RNOH: 0.82.22; SDK: HarmonyOS 6.0.0 Release SDK; IDE: DevEco Studio 6.0.0.878; ROM: 6.0.0.130;

4. 静态方法

5. 遗留问题

6. 其他

7. 开源协议

本项目基于 The MIT License (MIT) ，请自由地享受和参与开源。