error when running application - ios

i get this answer when I'm trying to run my application both on my iphone and in simulator.
Undefined symbols for architecture arm64:
"_OBJC_CLASS_$_AppDelegate", referenced from:
objc-class-ref in main.o
ld: symbol(s) not found for architecture arm64
clang: error: linker command failed with exit code 1 (use -v to see invocation)

Related

undefined symbol:_OBJC_CLASS_$_RCTModelManager error on Xcode release build -React native

undefined symbol:_OBJC_CLASS_$_RCTModelManager
Undefined symbols for architecture armv7:
"_OBJC_CLASS_$_RCTModalManager", referenced from:
objc-class-ref in libReact-Core.a(RCTModalHostViewManager.o)
ld: symbol(s) not found for architecture armv7
clang: error: linker command failed with exit code 1 (use -v to see invocation)```

symbol(s) not found for architecture arm64 in xcode 7.1

I got this error when trying to running app in simulator. And I'm using this library. https://github.com/donobono/DoImagePickerController. How can I solve this problem?
Undefined symbols for architecture arm64:
"_OBJC_CLASS_$_DoImagePickerController", referenced from:
objc-class-ref in NewActivityVC.o
ld: symbol(s) not found for architecture arm64
clang: error: linker command failed with exit code 1 (use -v to see invocation)
Thank you in advance

Compilation error in react native

I am trying to build my react native project for release and i am getting the error:
Undefined symbols for architecture armv7:
"_OBJC_CLASS_$_RCTRootView", referenced from:
objc-class-ref in AppDelegate.o
ld: symbol(s) not found for architecture armv7
clang: error: linker command failed with exit code 1 (use -v to see invocation)
can some one help here please i cant figure it out.

Undefined symbols for architecture x86_64

I try to build my project and get this error:
Undefined symbols for architecture x86_64:
"_OBJC_CLASS_$_FlurryAnalytics", referenced from:
objc-class-ref in AppDelegate.o
ld: symbol(s) not found for architecture x86_64
clang: error: linker command failed with exit code 1 (use -v to see invocation)

j2objc error while compile the project x86_64

Undefined symbols for architecture x86_64:
"_OBJC_CLASS_$_", referenced from:
objc-class-ref in AppDelegate.o ld: symbol(s) not found for architecture x86_64 clang: error: linker command failed with exit code
1 (use -v to see invocation)
I've been converted the library from Java into Objective-C. But I can't launch the project .
How to fix this issue?

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