How to make universal framework in iOS?

Question

I have created one project (Project 1) in which I am creating one framework which I want to use in different project (project 2) just like any other framework (drag drop in project).

My Issue

But when I created framework (in project 1) keeping device selected in xcode when I use this framework in my project 2 it works only for device not for simulator. vice versa if I created framework in project 1 keeping simulator selected in xcode and use this framework in project 2 it only works for simulator the.

errors for this is

What I am trying to achieve

My framework created from project 1 should run on both device and simulator in project 2.

following are my settings in both the projects

Answer 1

Xcode will build the framework according to the target selected. If framework built for simulator, architecture will be X86_64,i386, on the other hand for device it will be armv7, arm64. Can check the architecture of the framework using lipo command as below.

lipo -info sample.frameowrk/sample

Now , in your case you want your framework should support both simulator and device. So, you need to combine both framework (built for device and simulator) and create a FAT framework using lipo command as below:

lipo <path to framework build for simulator>/simulator.framework <path to framework build for device>/device.framework -create -output universal.framework

Resulted universal framework will support both platform. You can check the architecture supported by the universal framework as below:

lipo -info universal.framework/universal 

output : arm64,armv7,x86_64,i386