I'm trying to run my app on my phone with Expo Go but changes I make to the code are not being updated. Both my devices are on the same wifi network and Fast Refresh is enabled. When I reload the app on the Terminal, it says the bundling with my phone is complete, so it doesn't seem to be a connection error...
Any thoughts ?
Thanks!
Problem solved. If you're using Visual Studio Code, make sure you click on "Trust" the files you're coding on...
Related
I upgraded a react native project recently from expo SDK 36 to 38. It compiles now, but anytime I click on "Debug Remote JS", it causes the UI to become slow and unresponsive, only occasionally picking up the on click events. I created a bare bones project to duplicate it. To verify, either run expo init from cli or here's a project https://github.com/seniordevops/tab-application.git. Click the tabs without the debugger on, then turn on debug remote JS and watch the slow down. Happens on both Mac and PC. Any ideas on the root cause?
This is mostly due to the fact that the clock on your PC and mobile are not synchronized.
You either have to synchronize them or have the phone clock one second earlier than your PC/Mac.
I suspect the reason could be an upstream problem of react-native. Please check this expo-cli issue:
https://github.com/expo/expo-cli/issues/2405
a maintainer reports:
when you are debugging on your device, the javascript is being
executed in your browser on your computer :(
So I just finish the project, detached, using expoKit. Uploaded it to the testflight. And it pops out an error message said:"This experience uses an unsupported version of Expo(v22.0.0)..." So I re-publish my project in Expo XDE and the error message gone.
Now I am just confused, dose expoKit require a user to have an internet connection to use the app in order to download data from expo server?
What does expo really do?
you need to clear cache and storage in setting in emulator for expo.
in ur emulator go to settings/apps/expo/storage/clear...
it will work right now.
br
Yes, expo required internet connection, it will generate link and you need to open it in your device to see output
from it's doc
Expo apps are React Native apps which contain the Expo SDK. The SDK is a native-and-JS library which provides access to the device's system functionality (things like the camera, contacts, local storage, and other hardware). That means you don't need to use Xcode or Android Studio, or write any native code, and it also makes your pure-JS project very portable because it can run in any native environment containing the Expo SDK.
for more please see https://docs.expo.io/versions/latest/ and https://docs.expo.io/versions/latest/guides/up-and-running.html
I've been developing a react-native app using the simulator for a while. On the simulator (iOS), the app loads very fast (on reload for eg). However, when I tried to load the app to the device, it spends between 1-3 minutes in the splash screen before loading into the app.
My project is fairly small, and has no extra resources other than the javascript. Looking at the documentation I couldn't find what might be the cause of the issue, though I suspect it has to do with the fact that it is not getting the JS from the packager local server.
What am I doing wrong?
(btw - react-native v0.31)
I ran into the same issue and discovered that it was because I was running my app on device in development mode. To get the performance you're looking for, you'll need to build and run the app in production or "release" mode. You can do this by passing in a --configuration option and setting it to Release using the React Native CLI:
$ react-native run-ios --configuration Release
If that doesn't do the trick, then you may need to build your app in "Release" mode from Xcode. To do that, navigate to your projects /ios directory and open the .xcodeproj file in Xcode. Choose your build target in the Toolbar. Scroll to the bottom and choose "Edit Scheme...". Then under Build Configuration, switch from "Debug" to "Release". Now build your app on your target device and it should be much more performant than before.
You can read more in the official React Native documentation under Running on Device: Building your app for production.
For me the issue was related to the wifi network of my development machine. I was using WPA2 Enterprise auth to connect to wifi on my development machine. I found that if I used a wired connection to connect to my network or if I used another wifi connection that used a different form of auth then the delay went away. I think the delay is a network timeout.
Application get fail to launch in device having iOS 6.0 from xcode 4.5. Xcode says Application can't be launched timed out waiting for app to launch. I reset my all device settings. Cross checked if i choosed right provisioning. Yes, its right. here i am attaching image of console. Please help me out.
None of the above tips helped me. It turned out I was using my Distribution Profile instead of the Developer Profile in Debug mode. You can check the Profile you are using by going to
Build Settings->Code Signing Entity.
Make sure you are using your Developer Profile in Beta and Debug mode.
I had a similar issue when trying to debug an App with Ad-Hoc provisioning... Check which provisioning you're using, it seems ad-hoc provisioning cannot be used for debbuging.
Whenever this happens to me, I have done the following to fix the problem:
Stop the app from running in Xcode.
Delete the app from the device (or Simulator).
Select Product > Clean from the Xcode menu.
Close Xcode.
Close the Simulator (or restart the device).
Restart your computer (yes I know this like a Windows solution but seriously).
Try again.
I've installed Appcelerator Titanium Studio on a PC and I was not able to run the android simulator on it, so I was saying to myself "it should work on Mac at least"... and I installed a new Mac with Titanium on it, downloaded the SDK, then I imported the Kitchen Sink example and configured the run configuration with the default settings... and I'm getting exactly the same problem which is an infinite loop with the 'audio_flinged died' problem! So the best I can do is to view the Android simulator with the black window and "Android..." written on it.
What can I do to finally launch that example that is supposed to run? The best I did with my Windows 7 setup was to get the screen of an android cellphone WITHOUT any app on it (default apps), so it's pretty unuseful.
I'd really like to see what Titanium is capable to do.
The Mac ends (after a few mins) with "Launching New_configuration" has encountered a problem. Session initialization failed. "Session initialization failed Failed to get version"
The problem of the infinite loop with "AudioFlinger" still persist in the two cases (PC/Mac).
Any help would be greatly appreciated.
I helped someone with a similar question. He was getting a error which you don't seem to be but my answer walked him through checking the configuration was ok etc.
might help you:
Error running Android emulator from Titanium Studio