I was trying to integrate react-native-image-crop-picker to my react-native project. It was easy to get it working on Android but to get it to work on iOS I had to spend some considerable amount of time. Here I am writing down how I solved it hoping it will help you save your time and solve the problem faster if you should ever face it.
1 – Open your project’s .xcworkspace file in Xcode
2- Right-click “Libraries” and click “Add files to <Project_Name>”
3- Navigate to “node_modules -> react-native-image-crop-picker -> ios” and choose “imageCropPicker.xcodeproj”
4- Expand “Products” under “imageCropPicker.xcodeproj” and see “libimageCropPicker.a” file
5- Now click your <project_name>.xcworkspace root file then click “General” tab on the right
6- Scroll to the bottom and add “libimageCropPicker.a” (drag/drop) to Linked Frameworks and Libraries section
7- Clean (Command + option + shift + k) & re-build
8- If this does not work try adding RSKImageCropper.framework and QBImagePicker.framework to Embedded Binaries of your project on the “General” tab right above Linked Frameworks and Libraries section
Hope this helps.