If you are building an app that does not use Swift but embeds content such as a framework that does, Xcode will not include these libraries in your app. As a result, your app will crash upon launching with an error message looking as follows:
dyld: Library not loaded: @rpath/libswiftCoreGraphics.dylib Referenced from: /private/var/mobile/Containers/Bundle/Application/696F0EAD-E2A6-4C83-876F-07E3D015D167/<Your_App>.app/Frameworks/<Framework_Name>.framework/<Framework_Name> Reason: image not found
where <Your_App> and <Framework_Name> are respectively your app and the framework being embedded in your app.
To workaround this issue, set the
Always Embed Swift Standard Libraries (ALWAYS_EMBED_SWIFT_STANDARD_LIBRARIES) build setting to
YES in your app as shown in Figure 1. This build setting, which specifies whether a target's product has embedded content with Swift code, tells Xcode to embed Swift standard libraries in your app when set to YES.
Figure 1: Setting Always Embed Swift Standard Libraries to YES
Xcode Version : 9.4 (9F1027a)