报错代码：

Found Xcode project ****.xcodeproj

Could not find iPhone X simulator

Error: Could not find iPhone X simulator
    at resolve (/Users/路径/node_modules/react-native/local-cli/runIOS/runIOS.js:149:13)
    at new Promise (<anonymous>)
    at runOnSimulator (/Users/路径/node_modules/react-native/local-cli/runIOS/runIOS.js:134:10)
    at Object.runIOS [as func] (/Users/路径/node_modules/react-native/local-cli/runIOS/runIOS.js:106:12)
    at Promise.resolve.then (/Users/路径/node_modules/react-native/local-cli/cliEntry.js:117:22)

解决方案：
打开文件： /node_modules/react-native/local-cli/runIOS/findMatchingSimulator.js
更改以下代码：

将

if (!version.startsWith('iOS') && !version.startsWith('tvOS')) {
  continue;
}

改为

if (!version.startsWith('com.apple.CoreSimulator.SimRuntime.iOS') && !version.startsWith('com.apple.CoreSimulator.SimRuntime.tvOS')) {
  continue;
}