ReactNative开始

1. 项目初始化：

参考： https://reactnative.cn/docs/getting-started.html

问题1. EACCES: permission denied, open '/Users/mac/.npm。。。。。'

权限不允许
sudo chown -R $(whoami) ~/.npm
参考

问题2.

error Error: Failed to install CocoaPods dependencies for iOS project, which is required by this template. Please try again manually: "cd ./demo01/ios && pod install".

[!] CDN: trunk URL couldn't be downloaded: https://raw.githubusercontent.com/CocoaPods/Specs/master/Specs/6/7/d/boost-for-react-native/1.63.0/boost-for-react-native.podspec.json, error: Failed to open TCP connection to raw.githubusercontent.com:443 (Connection refused - connect(2) for "raw.githubusercontent.com" port 443)
cocoapods 1.8+强制安装了新的源trunk，采用cdn替换了原本的master
可更新cocoapods解决
参考

2. react-native错误

1. 运行iOS报错No bundle URL present
   Make sure you’re running a packager server or have included a .jsbundle file in your application bundle
   方案：我的解决办法， 用Xcode打卡这个项目就好了

2. RN中方法的形式
   错： _onTouchFn (color) {}
   对： _onTouchFn = (color) => {}
   绑定this onPress={this._onTouchFn.bind(this)}
   绑定this并传参 onPress={this._onTouchFn.bind(this，参数1)}

3. react-native项目启动时报错：Module AppRegistry is not registered callable module (calling runApplication)
   方案：1: 结束所有node进程；（ Mac OS系统下可执行 killall -9 node，windows请自行查找）
   2: npm start；
   3: react-native run-ios 或者 react-native run-android；