I have some problems with cinterops. I’m trying to...

# kotlin-native

[ribesg]

I have some problems with cinterops. I’m trying to add this to my iOS project: https://material.io/develop/ios/components/textfields/
My def file is like this:

depends = Foundation
package = framework.MaterialTextFields
language = Objective-C
headers = MaterialTextFields.h MaterialTextFields+Theming.h

compilerOpts = -framework MaterialComponents
linkerOpts = -framework MaterialComponents

My problem is that when I run cinterops I get this error:

Exception in thread "main" java.lang.Error: /Users/ribesg/XcodeProjects/events/Pods/MaterialComponents/components/TextFields/src/Theming/MDCTextInputControllerFilled+MaterialTheming.h:15:9: fatal error: 'MaterialComponents/MaterialContainerScheme.h' file not found

I found that MDCTextInputControllerFilled+MaterialTheming.h contains this line #import <MaterialComponents/MaterialContainerScheme.h> and cinterops does not seem to understand it properly. I do have this MaterialContainerScheme.h file in the context but it’s not in a folder/module/whatever called MaterialComponents I guess. How do I make this work?

[Artyom Degtyarev [JB]]

Maybe you can try to to include this header into the def file, with specifying it’s location? IMO it seems like this header should be imported along with this theming one anyway, if I understand this example in the documentation correctly(https://material.io/develop/ios/components/textfields/#theming-extensions)

[Artyom Degtyarev [JB]]

Also, don’t you tried to apply cocoapods plugin here?

[ribesg]

I tried but failed because I’m not creating a library here but an app and the plugin does not seem to be made for that purpose

[alex009]

you can try compare your config with moko-maps-google (we use cinterop here)
https://github.com/icerockdev/moko-maps/blob/master/maps-google/src/iosMain/def/GoogleMaps.def
https://github.com/icerockdev/moko-maps/blob/1e2af5a74545a261ceeec4c794ddf8678a2ebe81/maps-google/build.gradle.kts#L56

[ribesg]

@Artyom Degtyarev [JB] if I just add the header it said it cannot find, then it cannot find another one from that header I add. Adding the other one it doesn’t find doesn’t help. Well that’s unclear, but see this screenshot:

[ribesg]

MaterialColorScheme.h is found and imported successfully but it then still crashes on the next one because it knows MaterialColorScheme.h but not MaterialComponents/MaterialColorScheme.h

[ribesg]

message has been deleted

[ribesg]

@alex009 I see that you have modules in your def file, what does that do? Maybe I need that?

[alex009]

modules needed to linker. compilator will link your library with external modules

[alex009]

in your case header not found. You should pass frameworks to compiler with absolute path, like here: https://github.com/icerockdev/moko-maps/blob/1e2af5a74545a261ceeec4c794ddf8678a2ebe81/maps-google/build.gradle.kts#L67

[ribesg]

I do pass the MaterialComponents framework compiled by cocoapods which is located in the TARGET_BUILD_DIR but I’m trying to cinterops the content of Pods, not the built frameworks. That’s probably an issue

[ribesg]

Oh so modules in def replace headers. I’ve got something that compiles, let’s see

[ribesg]

Ok it works. Using modules instead of headers worked. The only problem I have is that I can’t find a way to build the frameworks from Pods without XCode, so I can no longer run cinterops without XCode 😞 Oh well.