expo

Hello I'm facing a problem with Expo React-Native. Whenever I try to launch the iOS Simulator. I get this error: 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`. Screenshot of Expo Results My NPM Version is 6.7.0 react-native-cli: 2.0.1 react-native: 0.57.1 Expo Version

I have been having an issue running my project on the android emulator, I have had several problems and currently, I am facing this: I have had several problems before getting to thhis one where I have to change classpath 'com.android.tools.build:gradle:3.3.0' and distributionUrl=https://services.gradle.org/distributions/gradle-4.10.1-all.zip but this new error still persists. If there is any additional information required to solve this please do ask. Thanks What went wrong: A problem occurred evaluating project ':expo-react-native-adapter'. Project with path ':expo-core' could not be found

I am having an issue related to react-native-asyncstorage from here: https://facebook.github.io/react-native/docs/asyncstorage.html When I run react-native run-ios , the following error appears: I am using react-native 0.52.0 and this problem may be due to the dependency of react-native-asyncstorage: react-native-asyncstorage@1.0.0 requires a peer of react-native@^0.47.2 but none is installed. You must install peer dependencies yourself. The odd thing is it works fine for Android, but not for both iOS nor iOS emulator. Can someone help? EDIT I would like to add some points that maybe useful: I

I updated 'android.support:appcompat-v7' to 28.0.0 . But it brought an error from the build. Attribute application@appComponentFactory value=(android.support.v4.app.CoreComponentFactory) from [com.android.support:support-compat:28.0.0] AndroidManifest.xml:22:18-91 is also present at [androidx.core:core:1.0.0] AndroidManifest.xml:22:18-86 value=(androidx.core.app.CoreComponentFactory). Suggestion: add 'tools:replace="android:appComponentFactory"' to <application> element at AndroidManifest.xml:8:5-23:19 to override. Then I get this error in my Logcat: Manifest merger failed my app.gradle:

I'm trying to switch screen using both stack and tab navigator. const MainNavigation = StackNavigator({ otp: { screen: OTPlogin }, otpverify: { screen: OTPverification}, userVerified: { screen: TabNavigator({ List: { screen: List }, Settings: { screen: Settings } }), }, }); In this case stacknavigator is used first and then tabnavigator. and i want to hide headers of stack navigator. WIt is not working properly when i use navigationoptions like:: navigationOptions: { header: { visible: false } } i'm trying this code on first two components which are using in stacknavigator. if i use this line