How counld I use ios dynamic framework in IOS plugins

I make a IOS plugin with a third-part dynamic framework, and install in my ue4 demo.
When I pacakge the project, and install the ipa on my iphone, it crashed.
the error log is error: ‘@rpath/xxxxxx.framework/xxxxxx’.

And I unzip the ipa, i can not found the “Frameworks” directroy, it seems the dynamic framework is not be copied.

How can i solve this problem?