模板版本：v0.2.2
[!TIP] Github 地址
请到三方库的 Releases 发布地址查看配套的版本信息：@react-native-oh-tpl/react-native-text-gradient Releases 。对于未发布到npm的旧版本，请参考安装指南安装tgz包。
进入到工程目录并输入以下命令：
npm install @react-native-oh-tpl/react-native-text-gradientyarn add @react-native-oh-tpl/react-native-text-gradient下面的代码展示了这个库的基本使用场景：
[!WARNING] 使用时 import 的库名不变。
import React from 'react';
import {StyleSheet, Text, View } from 'react-native';
import { LinearTextGradient } from 'react-native-text-gradient';
const TextGradientTest = () => {
return (
<View style={styles.container}>
<LinearTextGradient
style={styles.welcome}
locations={[0, 1]}
colors={['blue', 'red']}
start={{ x: 0, y: 0 }}
end={{ x: 1, y: 0 }}
>Welcome to React Native!
</LinearTextGradient>
<Text style={styles.instructions}>To get started, edit App.js</Text>
<Text style={styles.instructions}>{'Double tap R on your keyboard to reload,\n' +
'Shake or press menu button for dev menu'}</Text>
</View>
);
}
export default TextGradientTest;
const styles = StyleSheet.create({
container: {
flex: 1,
justifyContent: 'center',
alignItems: 'center',
backgroundColor: '#ffffff',
marginTop: 100
},
welcome: {
fontSize: 20,
width: 'auto',
height: 'auto',
},
instructions: {
textAlign: 'center',
color: '#333333',
marginBottom: 5,
},
});目前HarmonyOS暂不支持 AutoLink，所以 Link 步骤需要手动配置。
首先需要使用 DevEco Studio 打开项目里的HarmonyOS工程 harmony
{
...
"overrides": {
"@rnoh/react-native-openharmony" : "./react_native_openharmony"
}
}目前有两种方法：
- 通过 har 包引入（在 IDE 完善相关功能后该方法会被遗弃，目前首选此方法）；
- 直接链接源码。
方法一：通过 har 包引入（推荐）
[!TIP] har 包位于三方库安装路径的
harmony文件夹下。
打开 entry/oh-package.json5，添加以下依赖
"dependencies": {
"@rnoh/react-native-openharmony": "file:../react_native_openharmony",
"@react-native-oh-tpl/react-native-text-gradient": "file:../../node_modules/@react-native-oh-tpl/react-native-text-gradient/harmony/text_gradient.har"
}点击右上角的 sync 按钮
或者在终端执行：
cd entry
ohpm install方法二：直接链接源码
[!TIP] 如需使用直接链接源码，请参考直接链接源码说明
打开 entry/src/main/cpp/CMakeLists.txt，添加：
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_MODULES}/@react-native-oh-tpl/react-native-text-gradient/src/main/cpp" ./text_gradient)
# 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_text_gradient)
# RNOH_END: manual_package_linking_2打开 entry/src/main/cpp/PackageProvider.cpp，添加：
#include "RNOH/PackageProvider.h"
#include "generated/RNOHGeneratedPackage.h"
#include "SamplePackage.h"
+ #include "LinearTextGradientPackage.h"
using namespace rnoh;
std::vector<std::shared_ptr<Package>> PackageProvider::getPackages(Package::Context ctx) {
return {
std::make_shared<RNOHGeneratedPackage>(ctx),
std::make_shared<SamplePackage>(ctx),
+ std::make_shared<LinearTextGradientPackage>(ctx),
};
}打开 entry/src/main/ets/RNPackagesFactory.ts，添加：
...
+ import {LinearTextGradientPackage} from '@react-native-oh-tpl/react-native-text-gradient/ts';
export function createRNPackages(ctx: RNPackageContext): RNPackage[] {
return [
new SamplePackage(ctx),
+ new LinearTextGradientPackage(ctx)
];
}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。
要使用此库，需要使用正确的 React-Native 和 RNOH 版本。另外，还需要使用配套的 DevEco Studio 和 手机 ROM。
请到三方库相应的 Releases 发布地址查看 Release 配套的版本信息：@react-native-oh-tpl/react-native-text-gradient Releases
[!TIP] "Platform"列表示该属性在原三方库上支持的平台。
[!TIP] "HarmonyOS Support"列为 yes 表示 HarmonyOS 平台支持该属性；no 则表示不支持；partially 表示部分支持。使用方法跨平台一致，效果对标 iOS 或 Android 的效果。
| Name | Description | Type | Required | Platform | HarmonyOS Support |
|---|---|---|---|---|---|
| start | Coordinates declare the position that the gradient starts at, as a fraction of the overall size of the gradient, starting from the top left corner. | number | yes | iOS/Android | yes |
| end | Same as start, but for the end of the gradient. | number | yes | iOS/Android | yes |
| loactions | An optional array of numbers defining the location of each gradient color stop, mapping to the color with the same index in prop. | number[] | yes | iOS/Android | yes |
| colors | An array of at least two color values that represent gradient colors. | string | yes | iOS/Android | yes |
| useViewFrame | Optional. If true gradient will be calculated for text view background frame rather than text frame. | boolean | yes | iOS/Android | no |
| useGlobalCache | accessing or managing a cache that is available globally throughout the application. | boolean | yes | iOS | no |
本项目基于 The MIT License (MIT) ，请自由地享受和参与开源。