模板版本：v0.3.0

`react-native-image-sequence`

本项目基于 react-native-image-sequence@0.9.1 开发。

该第三方库的仓库已迁移至 Gitee，且支持直接从 npm 下载，新的包名为：@react-native-ohos/react-native-image-sequence，具体版本所属关系如下：

Version	Package Name	Repository	Release
<= 0.9.1@deprecated	@react-native-oh-library/react-native-image-sequence	Github(deprecated)	Github Releases(deprecated)
> 0.9.1	@react-native-ohos/react-native-image-sequence	Gitee	Gitee Releases

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-image-sequence-2

yarn

yarn add @react-native-ohos/react-native-image-sequence-2

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。

TestDemo.tsx

import React, { useState } from "react";
import { SafeAreaView, StyleSheet } from "react-native-harmony";
import { View, Text, Switch, TextInput, Button } from "react-native";
import TestDemo2 from "./TestDemo2";

const images = [
  { uri: "https://octodex.github.com/images/stormtroopocat.jpg" },
  { uri: 'https://octodex.github.com/images/saint_nictocat.jpg' },
  require("./assets/2.jpg"),
  require("./assets/3.jpg"),
  require("./assets/4.jpg"),
  require("./assets/5.jpg"),
  require("./assets/6.jpg"),
];

export interface sequenceType {
  images: NodeRequire[];
  loop: boolean;
  startFrameIndex: number;
  framesPerSecond: number;
  downsampleWidth: number;
  downsampleHeight: number;
}

const ImageSequenceDemo = (props: any) => {
  const [loopData, setLoopData] = useState(false);
  const [isShow, setIsShow] = useState(false);
  const [winWidth, setWinWidth] = useState(300);
  const [winHeight, setWinHeight] = useState(200);
  const [downsampleWidth, setDownSampleWidth] = useState(-1);
  const [downsampleHeight, setDownSampleHeight] = useState(-1);

  // 设置采样宽度
  const inputSampleWidth = (value: string) => {
    if (isNaN(Number(value))) {
      return;
    }
    setDownSampleWidth(Number(value));
  };

  // 设置采样高度
  const inputSampleHeight = (value: string) => {
    if (isNaN(Number(value))) {
      return;
    }
    setDownSampleHeight(Number(value));
  };

  // 设置起始位置
  const [startFrameIndex, setFrameIndex] = useState(0);
  const inputStartFrameIndex = (value: string) => {
    if (isNaN(Number(value))) {
      return;
    }
    let _value = Number(value);
    if (Number(value) > images.length) {
      _value = 0;
    }
    setFrameIndex(_value);
  };

  // 设置速率
  const [framesPerSecond, setFramesPerSecond] = useState(24);
  const inputFramesPerSecond = (value: string) => {
    if (isNaN(Number(value))) {
      return;
    }
    let _value = Number(value);
    if (Number(value) <= 0) {
      _value = 24;
    }
    setFramesPerSecond(_value);
  };

  const buttonIsShow = () => {
    setIsShow(!isShow);
  };

  const inputSetWinWidth = (value: string) => {
    if (isNaN(Number(value))) {
      return;
    }
    setWinWidth(Number(value));
  };

  const inputSetWinHeight = (value: string) => {
    if (isNaN(Number(value))) {
      return;
    }
    setWinHeight(Number(value));
  };

  return (
    <SafeAreaView>
      <View>
        <View>
          <Text>
            Current view size:width: {winWidth}, height:{winHeight}
          </Text>
          <Text>
            开启循环：<Switch onValueChange={(value) => setLoopData(value)}></Switch>
          </Text>
          <View>
            <Text>图片宽度/高度：</Text>
            <View style={styles.box}>
              <TextInput
                style={[styles.input, styles.input1]}
                onChangeText={(value) => inputSetWinWidth(value)}
                defaultValue="300"
                keyboardType="numeric"
              />
              <TextInput
                style={[styles.input, styles.input1]}
                onChangeText={(value) => inputSetWinHeight(value)}
                defaultValue="200"
                keyboardType="numeric"
              />
            </View>
          </View>
          <Text>开始位置：</Text>
          <TextInput
            style={styles.input}
            onChangeText={(value) => inputStartFrameIndex(value)}
            defaultValue="0"
            keyboardType="numeric"
          />
          <Text>播放速度：</Text>
          <TextInput
            style={styles.input}
            onChangeText={(value) => inputFramesPerSecond(value)}
            defaultValue="24"
            keyboardType="numeric"
          />
          <View>
             <Text>采样宽度/高度：</Text>
             <View style={styles.box}>
                <TextInput style={[styles.input, styles.input1]} onChangeText={value => inputSampleWidth(value)} defaultValue='-1' keyboardType='default' />
                 <TextInput style={[styles.input, styles.input1]} onChangeText={value => inputSampleHeight(value)} defaultValue='-1' keyboardType='default' />
              </View>
           </View>
        </View>
        {!isShow ? (
          <Button title="显示" onPress={() => buttonIsShow()} />
        ) : (
          <Button title="返回" onPress={() => buttonIsShow()} />
        )}
        {isShow ? (
          <TestDemo2
            loop={loopData}
            images={images}
            width={winWidth}
            height={winHeight}
            startFrameIndex={startFrameIndex}
            framesPerSecond={framesPerSecond}
            downsampleWidth={downsampleWidth}
            downsampleHeight={downsampleHeight}
          />
        ) : null}
      </View>
    </SafeAreaView>
  );
};
const styles = StyleSheet.create({
  continer: {
    flex: 1,
    justifyContent: "center",
    width: "100%",
    height: "100%",
  },
  title: {
    textAlign: "center",
    marginVertical: 8,
  },
  fixToText: {
    flexDirection: "row",
    justifyContent: "space-between",
  },
  separator: {
    marginVertical: 8,
    borderBottomColor: "#737373",
    borderBottomWidth: StyleSheet.hairlineWidth,
  },
  input: {
    height: 40,
    margin: 12,
    borderWidth: 1,
    borderColor: "red",
    padding: 10,
    width: 200,
  },
  box: {
    flexDirection: "row",
    justifyContent: "flex-start",
  },
  input1: {
    width: 100,
  },
});

export default ImageSequenceDemo;

TestDemo2.tsx

import { StyleSheet, View } from "react-native";
import ImageSequence from 'react-native-image-sequence-2'

const Separator = () => <View style={styles.separator}/>
const TestDemo2 = (props: any) => {
    return (
        <ImageSequence
        images={props.images}
        loop={props.loop}
        startFrameIndex={props.startFrameIndex}
        framesPerSecond={props.framesPerSecond}
        downsampleWidth={props.downsampleWidth}
        downsampleHeight={props.downsampleHeight}
        style={{width: props.width, height: props.height}}
        />
    )
}
const styles = StyleSheet.create({
    separator: {
        marginVertical: 8,
        borderBottomColor: '#737373',
        borderBottomWidth: StyleSheet.hairlineWidth
    }
})

export default TestDemo2

2. Manual Link

此步骤为手动配置原生依赖项的指导。

首先需要使用 DevEco Studio 打开项目里的 HarmonyOS 工程 harmony。

2.1 Overrides RN SDK

为了让工程依赖同一个版本的 RN SDK，需要在工程根目录的 harmony/oh-package.json5 添加 overrides 字段，指向工程需要使用的 RN SDK 版本。替换的版本既可以是一个具体的版本号，也可以是一个模糊版本，还可以是本地存在的 HAR 包或源码目录。

关于该字段的作用请阅读官方说明

{
  "overrides": {
    "@rnoh/react-native-openharmony": "^0.72.38" // ohpm 在线版本
    // "@rnoh/react-native-openharmony" : "./react_native_openharmony.har" // 指向本地 har 包的路径
    // "@rnoh/react-native-openharmony" : "./react_native_openharmony" // 指向源码路径
  }
}

2.2 引入原生端代码

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-ohos/react-native-image-sequence-2":"file:../../node_modules/@react-native-ohos/react-native-image-sequence-2/harmony/image_sequence.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

2.3 配置 CMakeLists 和引入 ImageSequence2Package

[!TIP] 版本 0.9.2 及以上需要.

打开 entry/src/main/cpp/CMakeLists.txt，添加：

+ set(OH_MODULES "${CMAKE_CURRENT_SOURCE_DIR}/../../../oh_modules")

# RNOH_BEGIN: manual_package_linking_1
+ add_subdirectory("${OH_MODULES}/@react-native-ohos/react-native-image-sequence-2/src/main/cpp" ./image_sequence_2)
# RNOH_END: manual_package_linking_1

# RNOH_BEGIN: manual_package_linking_2
+ target_link_libraries(rnoh_app PUBLIC rnoh_image_sequence_2)
# 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 "ImageSequence2Package.h"

using namespace rnoh;

std::vector<std::shared_ptr<Package>> PackageProvider::getPackages(Package::Context ctx) {
    return {
      std::make_shared<RNOHGeneratedPackage>(ctx),
+     std::make_shared<ImageSequence2Package>(ctx)
    };
}

找到 function buildCustomRNComponent()，一般位于 entry/src/main/ets/pages/index.ets 或 entry/src/main/ets/rn/LoadBundle.ets，添加：

  ...
+ import { RNImageSequence } from "@react-native-ohos/react-native-image-sequence-2"

const arkTsComponentNames: Array<string> = ["SampleView", 
"Generated",
"PropsDisplayer",
+ RNImageSequence.NAME
]

@Builder
export function buildCustomRNComponent(ctx: ComponentBuilderContext) {
  ...
+  if (ctx.componentName === RNImageSequence.NAME) {
+     RNImageSequence({
+       ctx: ctx.rnComponentContext,
+       tag: ctx.tag
+     })
+   }
...
}
...

打开 entry/src/main/ets/RNPackagesFactory.ts，添加：

  ...
+ import { ImageSequencePackage } from "@react-native-oh-tpl/react-native-image-sequence-2/ts";

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

2.4 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

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-ohos/react-native-image-sequence Releases

4. 属性

[!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
images	An array of source images. Each element of the array should be the result of a call to require(imagePath)	any[]	Yes	All	Yes
startFrameIndex	Which index of the images array should the sequence start at. Default: 0	number	No	All	Yes
framesPerSecond	Playback speed of the image sequence. Default: 24	number	No	All	Yes
loop	Should the sequence loop. Default: true	boolean	No	All	Yes
downsampleWidth	The width to use for optional downsampling. Both `downsampleWidth` and `downsampleHeight` must be set to a positive number to enable downsampling. Default: -1	number	No	All	Yes
downsampleHeight	The height to use for optional downsampling. Both `downsampleWidth` and `downsampleHeight` must be set to a positive number to enable downsampling. Default: -1	number	No	All	Yes

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。

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react-native-image-sequence-2.md

react-native-image-sequence-2.md

`react-native-image-sequence`

安装与使用

npm

yarn

2. Manual Link

2.1 Overrides RN SDK

2.2 引入原生端代码

2.3 配置 CMakeLists 和引入 ImageSequence2Package

2.4 运行

3. 约束与限制

3.1 兼容性

4. 属性

5. 遗留问题

6. 其他

7. 开源协议

Files

react-native-image-sequence-2.md

Latest commit

History

react-native-image-sequence-2.md

File metadata and controls

react-native-image-sequence

安装与使用

npm

yarn

2. Manual Link

2.1 Overrides RN SDK

2.2 引入原生端代码

2.3 配置 CMakeLists 和引入 ImageSequence2Package

2.4 运行

3. 约束与限制

3.1 兼容性

4. 属性

5. 遗留问题

6. 其他

7. 开源协议

`react-native-image-sequence`