can't find variable:Symbol

本文介绍了解决React Native 0.57.7版本在集成MobX最新版本时遇到的Symbol变量找不到的问题。主要原因是MobX使用了ES6的API特性,解决方案包括在项目中添加jsc-android依赖,并在构建脚本中进行特定配置。

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错误: react native0.57.7版本在集成mobx最新版本包 can't find variable:Symbol

原因:mobx的版本用的最新版本..用到了 Symbol部分es6的api特性.

解决的办法:

https://github.com/react-community/jsc-android-buildscripts#how-to-use-it-with-my-react-native-app

步骤:

1.Add jsc-android to the "dependencies" section in your package.json:

dependencies { "jsc-android": "236355.1.1",}

  npm install

 

2.在android/build.gradle文件添加以下内容:

allprojects {
    repositories {
        mavenLocal()
        google()
        jcenter()
        maven {
            // All of React Native (JS, Obj-C sources, Android binaries) is installed from npm
            url "$rootDir/../node_modules/react-native/android"
        }
         maven { url "https://jitpack.io" }
         maven { url "https://maven.google.com" }
        + maven {
        +      // Local Maven repo containing AARs with JSC library built for Android
        +       url "$rootDir/../node_modules/jsc-android/dist"
        + }
    }
}

3. app's build.gradle 文件下添加以下内容

 

+configurations.all {
+    resolutionStrategy {
+        force 'org.webkit:android-jsc:r236355'
+    }
+}

dependencies {
    compile fileTree(dir: "libs", include: ["*.jar"])

 

这样接可以了

 

 

D:\python3.10\python.exe E:\work\python\AI_py\提取文案\AT328P.py WARNING: KICAD6_SYMBOL_DIR environment variable is missing, so the default KiCad symbol libraries won't be searched. @ [E:\work\python\AI_py\提取文案\<frozen importlib._bootstrap_external>:883=>E:\work\python\AI_py\提取文案\<frozen importlib._bootstrap>:241] WARNING: KICAD7_SYMBOL_DIR environment variable is missing, so the default KiCad symbol libraries won't be searched. @ [E:\work\python\AI_py\提取文案\<frozen importlib._bootstrap_external>:883=>E:\work\python\AI_py\提取文案\<frozen importlib._bootstrap>:241] WARNING: KICAD8_SYMBOL_DIR environment variable is missing, so the default KiCad symbol libraries won't be searched. @ [E:\work\python\AI_py\提取文案\<frozen importlib._bootstrap_external>:883=>E:\work\python\AI_py\提取文案\<frozen importlib._bootstrap>:241] ERROR: Can't open file: Device. @ [E:\work\python\AI_py\提取文案\AT328P.py:11] WARNING: Could not load KiCad schematic library "Device", falling back to backup library. @ [E:\work\python\AI_py\提取文案\AT328P.py:11] Traceback (most recent call last): File "E:\work\python\AI_py\提取文案\AT328P.py", line 11, in <module> led = Part("Device", "LED_Small", footprint="LED_SMD:LED_0603_1608Metric") # 小尺寸LED File "D:\python3.10\lib\site-packages\skidl\part.py", line 187, in __init__ raise e File "D:\python3.10\lib\site-packages\skidl\part.py", line 177, in __init__ lib = SchLib(filename=libname, tool=tool) File "D:\python3.10\lib\site-packages\skidl\schlib.py", line 93, in __init__ abs_filename = get_abs_filename( File "D:\python3.10\lib\site-packages\skidl\utilities.py", line 909, in get_abs_filename fp, fn = find_and_open_file(filename, paths, ext, allow_failure, False, descend) File "D:\python3.10\lib\site-packages\skidl\utilities.py", line 852, in find_and_open_file active_logger.raise_( File "D:\python3.10\lib\site-packages\skidl\logger.py", line 131, in raise_ raise exc_class(msg) FileNotFoundError: Can't open file: Device. 进程已结束,退出代码为 1
04-01
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