Unable to compile: Duplicate interface definition for class 'FLAnimatedImageView'

Hi there!

I’m having problems compiling my app after adding react-native-fast-image.

After running react-native link react-native-fast-image, I receive a bunch of duplicate interface definition for class 'FLAnimatedImageView' and property has a previous declaration errors.

Here’s a subset of the errors I receive:

In file included from /Users/manuelthomsen/Coding/experiments/expo/woodn/node_modules/react-native-fast-image/ios/Vendor/SDWebImage/SDWebImage/FLAnimatedImage/FLAnimatedImageView+WebCache.m:16:
In file included from /Users/manuelthomsen/Coding/experiments/expo/woodn/node_modules/react-native-fast-image/ios/Vendor/SDWebImage/Vendors/FLAnimatedImage/FLAnimatedImage/FLAnimatedImage.h:13:
/Users/manuelthomsen/Coding/experiments/expo/woodn/node_modules/react-native-fast-image/ios/Vendor/SDWebImage/Vendors/FLAnimatedImage/FLAnimatedImage/FLAnimatedImageView.h:22:1: error: duplicate interface definition for class 'FLAnimatedImageView'
@interface FLAnimatedImageView : UIImageView
^
In module 'FLAnimatedImage' imported from /Users/manuelthomsen/Coding/experiments/expo/test/node_modules/react-native-fast-image/ios/Vendor/SDWebImage/SDWebImage/FLAnimatedImage/FLAnimatedImageView+WebCache.h:14:
/Users/manuelthomsen/Library/Developer/Xcode/DerivedData/test-ftzdxdyafvkexabeahltbammdnfq/Build/Products/Debug-iphonesimulator/FLAnimatedImage.framework/Headers/FLAnimatedImageView.h:22:12: note: previous definition is here
@interface FLAnimatedImageView : UIImageView
           ^
In file included from /Users/manuelthomsen/Coding/experiments/expo/test/node_modules/react-native-fast-image/ios/Vendor/SDWebImage/SDWebImage/FLAnimatedImage/FLAnimatedImageView+WebCache.m:16:
In file included from /Users/manuelthomsen/Coding/experiments/expo/test/node_modules/react-native-fast-image/ios/Vendor/SDWebImage/Vendors/FLAnimatedImage/FLAnimatedImage/FLAnimatedImage.h:13:
/Users/manuelthomsen/Coding/experiments/expo/test/node_modules/react-native-fast-image/ios/Vendor/SDWebImage/Vendors/FLAnimatedImage/FLAnimatedImage/FLAnimatedImageView.h:26:48: error: property has a previous declaration
@property (nonatomic, strong) FLAnimatedImage *animatedImage;

Any ideas on how to solve this? This is a basic expo app that has just been detached.

Tested on RN v. 46 and 47.

Thank you!

[ruipaulo]

Product-> Clean and then rm -rf ~/Library/Developer/Xcode/DerivedData/* did the trick for me.

[MrLoh]

@luco did you really try all three things?

• rm -rf ~/Library/Developer/Xcode/DerivedData/*
• rm -rf ios/build
• in xcode <kbd>Cmd</kbd> + <kbd>Shift</kbd> + <kbd>K</kbd>

Did you try building from xcode and command line

@DylanVann is there any chance you could look into fixing this in the code. This is sucha a terrible annoyance for everyone using this library and it happens regularly. I have no idea what has to be setup in xcode to make this disappear, but there must be something, as I haven’t gotten these errors from any other library.