React-native-blur: Failed to compile in Xcode: symbol(s) not found for architecture arm64

[fungilation]

I don't know if it's the cause, but I upgraded as npm suggested, from react-native-blur 1.2.1 to 1.3. Realized it doesn't work on RN 0.37 and I'm not ready to upgrade to RN 0.40 yet, so I downgraded react-native-blur back to 1.2.1. On compiling in Xcode to run my app on device, I get the following error:

Ld /Users/USER/Library/Developer/Xcode/DerivedData/APPNAME-bifiexuwlrscqffroslswjnvqvfq/Build/Products/Debug-iphoneos/APPNAME.app/APPNAME normal arm64
    cd /Users/USER/Documents/code/APPNAME/ios
    export IPHONEOS_DEPLOYMENT_TARGET=8.0
    export PATH="/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/usr/bin:/Applications/Xcode.app/Contents/Developer/usr/bin:/usr/local/bin:/usr/bin:/bin:/usr/sbin:/sbin"
    /Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/clang -arch arm64 -isysroot /Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS10.2.sdk -L/Users/USER/Library/Developer/Xcode/DerivedData/APPNAME-bifiexuwlrscqffroslswjnvqvfq/Build/Products/Debug-iphoneos -F/Users/USER/Library/Developer/Xcode/DerivedData/APPNAME-bifiexuwlrscqffroslswjnvqvfq/Build/Products/Debug-iphoneos -filelist /Users/USER/Library/Developer/Xcode/DerivedData/APPNAME-bifiexuwlrscqffroslswjnvqvfq/Build/Intermediates/APPNAME.build/Debug-iphoneos/APPNAME.build/Objects-normal/arm64/APPNAME.LinkFileList -Xlinker -rpath -Xlinker @executable_path/Frameworks -miphoneos-version-min=8.0 -Xlinker -object_path_lto -Xlinker /Users/USER/Library/Developer/Xcode/DerivedData/APPNAME-bifiexuwlrscqffroslswjnvqvfq/Build/Intermediates/APPNAME.build/Debug-iphoneos/APPNAME.build/Objects-normal/arm64/APPNAME_lto.o -Xlinker -no_deduplicate -fembed-bitcode-marker -fobjc-arc -fobjc-link-runtime -ObjC -lc++ /Users/USER/Library/Developer/Xcode/DerivedData/APPNAME-bifiexuwlrscqffroslswjnvqvfq/Build/Products/Debug-iphoneos/libReact.a /Users/USER/Library/Developer/Xcode/DerivedData/APPNAME-bifiexuwlrscqffroslswjnvqvfq/Build/Products/Debug-iphoneos/libRCTActionSheet.a /Users/USER/Library/Developer/Xcode/DerivedData/APPNAME-bifiexuwlrscqffroslswjnvqvfq/Build/Products/Debug-iphoneos/libRCTGeolocation.a /Users/USER/Library/Developer/Xcode/DerivedData/APPNAME-bifiexuwlrscqffroslswjnvqvfq/Build/Products/Debug-iphoneos/libRCTImage.a /Users/USER/Library/Developer/Xcode/DerivedData/APPNAME-bifiexuwlrscqffroslswjnvqvfq/Build/Products/Debug-iphoneos/libRCTLinking.a /Users/USER/Library/Developer/Xcode/DerivedData/APPNAME-bifiexuwlrscqffroslswjnvqvfq/Build/Products/Debug-iphoneos/libRCTNetwork.a /Users/USER/Library/Developer/Xcode/DerivedData/APPNAME-bifiexuwlrscqffroslswjnvqvfq/Build/Products/Debug-iphoneos/libRCTSettings.a /Users/USER/Library/Developer/Xcode/DerivedData/APPNAME-bifiexuwlrscqffroslswjnvqvfq/Build/Products/Debug-iphoneos/libRCTText.a /Users/USER/Library/Developer/Xcode/DerivedData/APPNAME-bifiexuwlrscqffroslswjnvqvfq/Build/Products/Debug-iphoneos/libRCTVibration.a /Users/USER/Library/Developer/Xcode/DerivedData/APPNAME-bifiexuwlrscqffroslswjnvqvfq/Build/Products/Debug-iphoneos/libRCTWebSocket.a -lSafariViewManager -lReact-Native-Webview-Bridge -lRealmReact -lc++ -lz -lRNVectorIcons -lRNBlur -Xlinker -dependency_info -Xlinker /Users/USER/Library/Developer/Xcode/DerivedData/APPNAME-bifiexuwlrscqffroslswjnvqvfq/Build/Intermediates/APPNAME.build/Debug-iphoneos/APPNAME.build/Objects-normal/arm64/APPNAME_dependency_info.dat -o /Users/USER/Library/Developer/Xcode/DerivedData/APPNAME-bifiexuwlrscqffroslswjnvqvfq/Build/Products/Debug-iphoneos/APPNAME.app/APPNAME

Undefined symbols for architecture arm64:
  "_OBJC_CLASS_$_BlurAmount", referenced from:
      objc-class-ref in libRNBlur.a(BlurView.o)
ld: symbol(s) not found for architecture arm64
clang: error: linker command failed with exit code 1 (use -v to see invocation)

I've tried rm -rf ~/Library/Developer/Xcode/DerivedData/ to delete cache, as well as react-native unlink react-native-blur and link again. Same error.

Any help would be appreciated.

[fungilation]

Note that I've been working on my app only on the iOS Simulator so far, and it has always compiled without error. This error shows only when I tried targeting the physical iPhone device in Xcode.

[Kureev]

Sorry, 1.3.0 is broken, use 1.2.* instead

[fungilation]

I am on 1.2.1. Note again that I downgraded 1.3 to 1.2.1, I don't know if that's the cause.

I tried removing react-native-blur and my app builds for my iPhone device. So no other library I use is broken. I'm on RN 0.37.

[jackread]

Same situation... upgraded then downgraded... now here.

Seems to be only when doing a "release" build.

[fungilation]

Yes. Only release build, debug build was fine.
On Tue, Jan 31, 2017 at 2:07 PM Jack Read [e-mail] wrote:

Same situation... upgraded then downgraded... now here.

Seems to be only when doing a "release" build.

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Cheers,
Gary

[Kureev]

Most likely you'll have to unlink and link again once you downgraded to < 0.40.

[fungilation]

Tried that already. Even removing and re adding by NPM. Doesn't work.

On Wed, Feb 1, 2017 at 2:01 AM Alexey [e-mail] wrote:

Most likely you'll have to unlink and link again once you downgraded to <
0.40.

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Cheers,
Gary

[jackread]

Same here ^^

[Kureev]

Hm, it works on the blank RN 0.37 project + react-native-blur 1.2.1. Are you sure you unlinked it properly?

[fungilation]

via react-native unlink; react-native link

Thanks,
Gary Fung

On Feb 1, 2017, 1:10 PM -0800, Alexey [e-mail], wrote:

Hm, it works on the blank RN 0.37 project + react-native-blur 1.2.1. Are you sure you unlinked it properly?
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[Kureev]

Did you unlink before downgrading? Otherwise it may leave some garbage / don't unlink properly

[maxs15]

Had the same issue,
For some reason the files BlurAmount.h/BlurAmount.h were not included in RNBlur.xcodeproj

[yuanoook]

Your react-native-blur may is not the latest version.
Try to update every react* modules into the latest version, and unlink then link everything.

[perrosnk]

same problem here!

[DevBkIL]

A fix for it...
go Libraries => RNBlur => select TARGETS => Build Phases => add blurAmount.m to Compile Sources.. somebody forgot to put it there..
hope it helps.. cheers!
edit: RN 0.39 RNBlur 1.2.1

[perrosnk]

@DevBkIL thanks! that solved my problem!

[adgarcia]

@DevBkIL Argh, thanks! That was exactly my issue

[pabloamg]

@DevBkIL Where is the blurAmount.m?? Cant find it

[Kureev]

A fix for it...
go Libraries => RNBlur => select TARGETS => Build Phases => add blurAmount.m to Compile Sources.. somebody forgot to put it there..
hope it helps.. cheers!
edit: RN 0.39 RNBlur 1.2.1

It is fixed in 2.0.0 btw