您好，我遇到了Expo React-Native问题。每当我尝试启动iOS模拟器时。我收到此错误：
Simulator is installed but is identified as 'com.apple.CoreSimulator.SimulatorTrampoline'; don't know what that is.
Simulator not installed. Please visit https://developer.apple.com/xcode/download/ to download Xcode and the iOS simulator. If you already have the latest version of Xcode installed, you may have to run the command `sudo xcode-select -s /Applications/Xcode.app`.我的NPM版本是6.7.0 react-native-cli：2.0.1 react-native：0.57.1 Expo版本2.11.9
另外，我确保我在Xcode上的命令行工具已完美设置 Xcode CommandLineTools
最后，我也尝试运行命令 sudo xcode-select -s /Applications/Xcode.app
什么都没有
