Unable to launch react-native(0.29) on iOS physical device(9.3)

[brennanerbz]

Only using the react-native-cli starter without changing any app code, I've done everything possible to launch on physical device.

I've followed the react-native docs, changed the IP address to my mac's, provisioned my phone, everything. Please help, as I've spent hours on this.

It seems the react-native0.29 AppDelegate file is different than 0.21. Could this be problem?

Here's the error screenshot:

[rogchap]

Looking at the code, it seems that you need an ip.txt file in your main bundle:

https://github.com/facebook/react-native/blob/master/React/Base/RCTBundleURLProvider.m#L29

[rogchap]

Looking further:

react-native/packager/react-native-xcode.sh

Line 77 in 8c29a52

echo "$IP.xip.io" > "$DEST/ip.txt"

Seems that the packager should create this file. I think this means that you should not have to change anything to run on your device.

[DanielMSchmidt]

@facebook-github-bot stack-overflow

[ghost]

Hey @brennanerbz and thanks for posting this! @DanielMSchmidt tells me this issue looks like a question that would be best asked on StackOverflow. StackOverflow is amazing for Q&A: it has a reputation system, voting, the ability to mark a question as answered. Because of the reputation system it is likely the community will see and answer your question there. This also helps us use the GitHub bug tracker for bugs only. Will close this as this is really a question that should be asked on SO.

[npomfret]

thanks @rogchap - since upgrading to rn 0.29 i can no longer run on a physical device. I'm getting the "Could not connect to development server" error. Have the commands changed that I need to run?

Before I was just running npm start.

[rogchap]

Have you updated your AppDelegate? It's completely changed from previous
versions.
On Wed, 13 Jul 2016 at 20:23, Nick Pomfret notifications@github.com wrote:

thanks @rogchap https://github.com/rogchap - since upgrading to rn 0.29
i can no longer run on a physical device. I'm getting the "Could not
connect to development server" error. Have the commands changed that I need
to run?

Before I was just running npm start.

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[npomfret]

Completely changed? What's different? The only thing I noticed was:

jsCodeLocation = [[RCTBundleURLProvider sharedSettings] jsBundleURLForBundleRoot:@"index.ios" fallbackResource:nil];

Yes, I've got that. So how do now load js files from a physical device? I use'd to just specify an ipaddress (jsCodeLocation = [NSURL URLWithString:@"http://192.168.1.64:8081/index.ios.bundle?platform=ios&dev=true"];). But that's not an option any more. The docs are out of date as well.

[rogchap]

Have you run '$ react-native upgrade' to upgrade your templates?

There are some script files that copy your IP address into a ip.txt file
that is used to access your local machine.

In 0.29.x you do not need to make any changes to run on a physical device.
Just be on the same WiFi network.
On Wed, 13 Jul 2016 at 23:39, Nick Pomfret notifications@github.com wrote:

Completely changed? What's different? The only thing I noticed was:

jsCodeLocation = [[RCTBundleURLProvider sharedSettings]
jsBundleURLForBundleRoot:@"index.ios" fallbackResource:nil];

Yes, I've got that. So how do now load js files from a physical device? I
use'd to just specify an ipaddress (jsCodeLocation = [NSURL
URLWithString:@"
http://192.168.1.64:8081/index.ios.bundle?platform=ios&dev=true"];). But
that's not an option any more. The docs are out of date as well.

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[npomfret]

Yes, I've run react-native upgrade. Maybe i missed something in the merge process, but I can't see what. My phone will only load the pre packaged JS files now. What should I look for? How does the phone know which ip address to use?

[longsangstan]

https://facebook.github.io/react-native/docs/running-on-device-ios.html

Seems that the docs are out-dated.

[strefethen]

@npomfret Did you manage to get this resolved? I have the same issue in that my app no longer connects to the packager and only uses the bundled JS. I have ATS setup with an exception for localhost but I believe that was the default setup when I created my app.

Thanks

[npomfret]

Yes, see my comments here #8358

No idea if its the right thing to do, but as far as I can tell the documented solution is wrong.

[strefethen]

@npomfret I dug into this a bit more and found that my problem was related to how the react-native-xcode.sh script creates the IP.txt file when the machine is only on wifi. It uses ipconfig getifaddr en0 which returns blank. I explained the rest here:

http://www.stevetrefethen.com/blog/react-native-bundle-loading-failing-on-a-physical-device

Basically, you should not have to hard code your IP address in AppDelegate.m it should "just work", if your machine is connected on "en0" that is.

[npomfret]

Right so if you have 2 or more network interfaces, which I do - you need to make sure that the node process binds to the wifi and not the ethernet? How on earth do you do that? I want to use ethernet when its available, not wifi, so I'd rather not bump wifi to the top of the list. I guess that's just not possible now

[strefethen]

Unfortunately, I don't have a great answer other than tweaking react-native-xcode.sh to look at the right device for writing out the IP.txt file. At least I understand what's really happening now. :|