Update README.md

README.md

 # template
 
-## Project setup
+## 项目安装
 ```
-npm install
+yarn
 ```
 
-### Compiles and hot-reloads for development
+### 安卓相关
 ```
-npm run serve
+yarn android
 ```
 
-### Compiles and minifies for production
+### 相机调用  
+vue 向 rn 传递数据
 ```
-npm run build
+//  str: 字符串, camera -> 相机拍照; record -> 相机摄像
+window.ReactNativeWebView.postMessage(str) 
 ```
 
-### Run your tests
+vue 接收数据  
 ```
-npm run test
+window.WebViewBridge = {
+  onMessage: this.onMessage, //在window上挂载一个onMessage方法，RN自行调用
+  // receiveMessage: this._receiveMessage
+}
+  
+const event = new Event('WebViewBridge')
+window.dispatchEvent(event);
 ```
 
-### Lints and fixes files
-```
-npm run lint
-```
+