对于运行react-native run-ios报错
[Info] 正在启动 React Native 包生成工具。
Scanning folders for symlinks in /Users/apple/Desktop/RN项目/RNVideo/node_modules (11ms)
Found Xcode project RNVideo.xcodeproj
CoreData: annotation: Failed to load optimized model at path '/Applications/Xcode10.3.app/Contents/Applications/Instruments.app/Contents/Frameworks/InstrumentsPackaging.framework/Versions/A/Resources/XRPackageModel.momd/XRPackageModel 9.0.omo'
Could not find iPhone 6 simulator
这种错误只用修改react-native，local-cli，runIOS，findMatchingSimulator.js文件即可，修改内容如下，
将if (version.indexOf('iOS') !== 0) 修改成如下：
if (version.indexOf('iOS') !== 0 && !version.includes('iOS')) {
continue;
}
将if (simulator.availability !== '(available)'）修改成如下：
if (simulator.availability !== '(available)' && (simulator.isAvailable !== true)) {
continue;
}
