Useful or not, from you.
react-native error Failed to build iOS project. We ran "xcodebuild" command but it exited with error code 65

error Failed to build iOS project. We ran "xcodebuild" command but it exited with error code 65. To debug build logs further, consider building your app with Xcode.app, by opening MeiTuan.xcodeproj. Run CLI with --verbose flag for more details.

React Native version: 0.60 Xcode: 10.2.1

That's a useful answer
Without any help

@hepf888 open your project(ios/app.xcworkspace) in Xcode -> Product -> Build. Then check error messages.