I have a problem when running react-native run-ios on my project.
The IOS emulator launch well.
Then the application start (react-native white splash screen) and immediately after that, it return me to the Iphone home screen.
If I Cmd-Shift-H (with pressing H two times) I saw the app in the background (still with the react-native white splash screen).
When I click on it, it return me to the home screen again.
If I launch the Xcode project and run the app, it work fine and I can navigate in my application.
I've had some troubles with my app before, the IOS version was 'abandoned' and I've installed a lot of modules and changed the name of the project in the mean time, before trying to make it work on IOS.
Then I've decided to create a new project with react-native init myNewProject (because I couldn't figured out how to fix the IOS, something with a workspace not configured) and copy paste my old src and index.ios/android.js inside.
So now Android is still working and IOS is only working if I launch the app from Xcode.
I've tried to reset the emulator but it don't change anything.
I don't have any logs about app crash or something.
The Android app version is working fine.
Any idea ?
Logs
I've put the device logs after running react-native run-ios on a gist
https://gist.github.com/ansmonjol/f6fa1e71a20b944bf67429c57d081165
Additional Information
React Native version: 0.35
Platform: IOS
Operating System: macOS El capitan
Xcode: Version 8.0
I ran into this problem, and solve it:
In my case i install third-party native component in my project and link it using command react-native link <component-name>. Than i have a problem about you wrote:
Running project by Xcode - works fine. Bundling start, after loading dependency graph.
But runnig project by react-native run-ios app hide immediately and bundling not started after loading dependency graph. And not any errors happened.
I tried reinstall all, clean npm cache, react-native upgrade, delete build folder, delete derived data... nothing helped.
I found one way that helped me:
I remove that problem library not manyally from Xcode, but from terminal using command react-native unlink <component-name>. Its way to resolve this problem for me, maybe for you too.
Sorry for my english.
Related
I am building an app using react-native on Expo and making sure to build with EAS every few days or whenever I add a new dependency.
After every build, I install the apk on an Android device and run the ios build on a simulator.
On my latest build, the build completes successfully but after installing the apk on android 10, the app opens and crashes once I navigate to a certain page.
It works fine on 3 other android phones.
The code difference between the last successful build that doesn't crash to the current one is minimal however very necessary for the app.
How can I see logs from the native crash in order to find the cause of the problem and hopefully find a fix?
I tried to install sentry but at the bottom of the page, it explains it only follows js issues and is not native.
Any ideas will be helpful
Thanks
I've been working on a react-native app managed mode built on expo, I was working from a mac at first which worked perfectly fine using the IOS simulator it didn't work on android emulator on mac, here i switched to a windows computer and the issue still exists on the android emulator, executing the command "expo start" the app crashes after the splash screen before the logo appears, I tested the app on a real device on the debug mode and it worked! also after deploying the apk file the app works with no issues, the only problem is it's not working on android simulator using expo client, things i tried to solve the issue including trying to reinstall android studio and install the latest version, tried updating expo sdk to latest version also tried playing around with the app.js from where the app launches the first time but still crashes at the same point, it's not showing any errors or warning it just crashes, any suggestion or something i could try would be very helpful thanks.
I am also having a similar issue : after upgrading to the latest release (SDK 41) the android simulator hangs often and the app crash without any errors. But works some time .
I want to run my React Native app in the iOS emulator. Here is what I done so far:
I installed XCode, along with its command line tools, and can bring up the emulator without issue.
I created an empty React Native app using the Expo CLI, per the instructions here. https://facebook.github.io/react-native/docs/getting-started. I am running on Node v10.0.0 on a Mac.
Afterwards I install all the necessary dependencies.
I then run "sudo npm run ios". This fires up the Metro Bundler as well as the iOS simulator. The Simulator loads up after about 5 minutes of waiting, but my app does not start up.
What am I missing here?
I should note that I prefer to stick with Expo, so I'd prefer not to have to eject.
Env:
Mac OS X
nodejs 8.9.1
Xcode installed
using boilerplate generated by https://github.com/react-community/create-react-native-app
Symptom:
React Native stuck on Loading dependency graph, done and when go to localhost:8081, I see React Native packager is running.
Also the command line after I did npm start what I got is Loading dependency graph, done. and just stay there, even after I waited for almost 5min.
Actually I found the answer myself.
There is actually nothing wrong. I forgot to start the React Native in the simulator! lol Silly right?
So basically let say if you want to start the iOS simulator in a MacOS, you can just do react-native run-ios --simulator="iPhone 5s" in your project root. Then boom! your project started!
Note that React Native can't really run in the browser, it has to be running inside a phone simulator either iOS or Android.
See official doc for more https://facebook.github.io/react-native/docs/running-on-simulator-ios.html
Have fun!
Windows 7 64bits
Genymotion
I just upgraded my code to react native 0.30, 0.31, 0.32. Live and hot reload not working anymore. It works perfect in 0.28.
I tried on clean project also not working and no error in cmd and js debugger.
Here is the progress
react-native init Project
cd Project
react-native run-android
then in Genymotion
Enable Live Reload
Enable Hot Loader
The app is refreshed when file saved but nothing changed.
The only way to make the app reload is react-native run-android again.
Any idea?
You read this article
https://github.com/facebook/react-native/issues/7257
Note: Version 0.32 , directory node-haste moved to node_modules\react-native\packager\react-packager\src\node-haste
Try again, please