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最佳答案

Delete node modules, then run npm install (or better yet yarn) and after everything has finished downloading, run react-native upgrade which should give you the option to replace old files with the template ones, by doing so you re-link your native dependencies in react-native which should fix your problem. Of course don't forget to clean your project in Xcode.

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I faced same issue .then i have deleted node .try to use these steps

Delete the node_modules folder - rm -rf node_modules && npm install
Reset packager cache - rm -fr $TMPDIR/react-* or node_modules/react-native/packager/packager.sh --reset-cache
Clear watchman watches - watchman watch-del-all

then make build and see

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If you havent run npm install you are likely to encounter this issue.

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you need to install react native, in terminal run

/usr/bin/ruby -e "$(curl -fsSL https://raw.githubusercontent.com/Homebrew/install/master/install)"

then

brew install node
brew install watchman
npm install -g react-native-cli

source:
https://facebook.github.io/react-native/docs/getting-started.html

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In the base dir of the project I run:

node_modules/react-native/packager/packager.sh --reset-cache

Which resulted in:

Scanning 554 folders for symlinks in /Users/..../work/..../react_tutorial/AwesomeProject/node_modules (15ms)
┌────────────────────────────────────────────────────────────────────────────┐
│  Running packager on port 8081.                                            │
│                                                                            │
│  Keep this packager running while developing on any JS projects. Feel      │
│  free to close this tab and run your own packager instance if you          │
│  prefer.                                                                   │
│                                                                            │
│  https://github.com/facebook/react-native                                  │
│                                                                            │
└────────────────────────────────────────────────────────────────────────────┘
Looking for JS files in
/Users/..../work/...../react_tutorial/AwesomeProject


Loading dependency graph... ERROR  Packager can't listen on port 8081
Most likely another process is already using this port
Run the following command to find out which process:


lsof -i :8081

I found that package manager can't run when another packager process is running.

I found the process running with:

lsof -i :8081

Than I kill 9 ... the process.

After than I closed Xcode, run:

npm install

And started Xcode again, from this moment everything work as expected!!

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None of the other suggestions were fixing my error but this one did it.

1 - Create Podfile

Create a file named ios/Podfile inside your react-native app with the following contents:

# You Podfile should look similar to this file. React Native currently does not support use_frameworks!
source 'https://github.com/CocoaPods/Specs.git'


platform :ios, '8.0'


target '<YOUR_APP_NAME>' do
# Fixes required for pod specs to work with rn 0.42
react_native_path = "../node_modules/react-native"
pod "Yoga", :path => "#{react_native_path}/ReactCommon/yoga"
pod "React", :path => react_native_path, :subspecs => [
'Core',
'RCTActionSheet',
'RCTAnimation',
'RCTGeolocation',
'RCTImage',
'RCTLinkingIOS',
'RCTNetwork',
'RCTSettings',
'RCTText',
'RCTVibration',
'RCTWebSocket'
]


pod 'GoogleMaps'  # <~~ remove this line if you do not want to support GoogleMaps on iOS


# when not using frameworks  we can do this instead of including the source files in our project (1/4):
#  pod 'react-native-maps', path: '../../'
#  pod 'react-native-google-maps', path: '../../'  # <~~ if you need GoogleMaps support on iOS
end

2 - Install Podfile

Run the command pod install from inside the ios folder.

3 - Reset XCode

Restart XCode and the error should be gone.

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For all those are using React Native 0.40.0 or higher, Header Imports have a major change from RN 0.40.0 and result in lots of .h file not found errors. react-native-git-upgrade fixed the issue for me while in debug but build fails in release/archive.

I am using RN 0.42.3 with cocoapods and Xcode 8.2.1

To completely fix this go to Xcode>Product>Scheme>Edit Scheme>

Untick Parallelize Build
Click on + button in Targets and add React
Drag the added React to top of the List in Targets.

Now clean the project and build

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I found that my fix to this issue after upgrading React was to change the declaration of #import "RCTBundleURLProvider.h" to #import <React/RCTBundleURLProvider.h>

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Try the following:

Clean (cmd+shift+K).
Build core React - select React as the scheme in Xcode and build it (cmd+B).
Build the library that is failing (e.g. RCTText).
Build your app.

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I had the same issue and I fixed it by placing RNFIRMessaging.h above the React/RCTBundleURLProvider.h

So it look I will look like:

#import "AppDelegate.h"
#import "RNFIRMessaging.h"


#import <React/RCTBundleURLProvider.h>
#import <React/RCTRootView.h>

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xcode Product->Scheme->Manage Schemes click '+' at the Target to select "React" and set the React is shared.

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I solved this problem by following steps:

In xcode choose project root.
Drag React.xcodeproj from Libraries to the root of the project.
Click on project name (in my case it name SaleKit) in TARGETS
Choose Build Phases
In dropdown of Target Dependencies add React
Rebuild or re-run

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I ran into this problem after my first try running a React build in XCode, and all I had to do was actually build and run to make the error go away (after picking a team and proper provisioning). Sometimes XCode shows errors that aren't really errors until it compiles and links things the first time.

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Make sure that the path to your project don't have any spaces. Just renaming folders and deleting spaces solves the problem for me.

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I tried all the suggestions and none of them worked at the i deleted the repo and clone it again and that work for me, so my suggestion is commit your changes back them up and clone the repo again that worked for me.

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Run npm install in your project directory to install react-native resolving this error.

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I have gone through all the answers mentioned above.

Here is the solution worked for me:

STEP 1:

Run:

npm install react-native-fcm --save

This result in making the directory in your project under node_modules > react-native-fcm

STEP 2:

You need to add '$(SRCROOT)/../node_modules/react-native-fcm/ios' to header search paths in build settings.

These 2 steps worked for me to remove the error.

For more details you can go through these links:

https://github.com/evollu/react-native-fcm/issues/63

https://github.com/evollu/react-native-fcm/issues/21

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For my case in ReactNative "0.54.2", i solved it with following solution

In Xcode select Product->Scheme->Manage Schemes, untick 'YourProject'-tvOS set it to not Shared

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You might be running .xcodeproj file after pod is installed.

Close it and open .xcworkspace file. It worked for me.

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The solution that works for me is to share React scheme.

If you don't have React scheme, create new one by Selecting scheme menu -> Manage Scheme -> + -> choose React, then mark React scheme as Shared

Also, if you use Xcode 10, go to File -> Project Settings and select Legacy build system

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click Product->Scheme->Manage Schemes->+ . and then add react as shared. also insure that your project name is there too.

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Best Solution :

Open 'Build Settings' for your project in Xcode , search 'Header Search Path'.

Double click next to 'Header Search Path', where other properties have a 'yes' or 'no'

Now add following to the "Header Search Path" (under Build Settings):

$(SRCROOT)/../node_modules/react-native/React
$(SRCROOT)/../node_modules/react-native/React/Base

Don`t forget Make both of them recursive.

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For my case, I couldn't delete node_modules and re-install and I also couldn't do react-native-git-updgrade or react-native upgrade because I wanted to stay on RN-0.59 because .60 causes problems for my dependencies.

Anyway my situation was that I was missing 'React/RCTBundleURLProvider.h' file. I already had React available in my schemas. It was not in my libraries directory. I checked my target's build settings.

Inside target dependencies, I also had React in there.

I deleted 'React' target dependency, then re-added. cleaned build folders, re-built project. it worked.

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For me replacing

#import <React/RCTBundleURLProvider.h>
#import <React/RCTRootView.h>

by

#import <RCTBundleURLProvider.h>
#import <RCTRootView.h>

in AppDelegate.m file worked.

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I am using React Native 0.61. I created a Share Extension and was getting this error. I needed to replace:

#import "RCTBundleURLProvider.h"

with

#import "React/RCTBundleURLProvider.h"

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https://github.com/facebook/react-native/blob/v0.63.3/template/ios/Podfile

Find/Replace HelloWorld with your your project name.

Place this file into the ./ios folder in your project

gem install cocoapods
cd ios
pod install

Then open the YourProject.xcworkspace file in XCode

in XCode, go to Product -> Scheme -> Manage Schemes and check React

Then try building the project again.

"RCTBundleURLProvider.h" file not found - AppDelegate.m

1 - Create Podfile

2 - Install Podfile

3 - Reset XCode