我注意到这是我的第一个反应本机应用程序，这就是我尝试导入第一个组件时的状态：
"React.createElement: type is invalid -- expected a string (for built-in components) or a class/function (for composite components) but got: %s.%s%s, object, You likely forgot to export your component from the file it's defined in, or you might have mixed up default and named imports.
Check your code at App.js:9.,
in App (created by ExpoRoot)
in RNCAppearanceProvider (at src/index.tsx:70)
in AppearanceProvider (created by ExpoRoot)
in ExpoRoot (at renderApplication.js:45)
in RCTView (at AppContainer.js:109)
in DevAppContainer (at AppContainer.js:124)
in RCTView (at AppContainer.js:135)
in AppContainer (at renderApplication.js:39)
* [native code]:null in __expoConsoleLog
