iOS UI Test Project 'MailCore/MailCore.h' file not found - mailcore2

Question

I did a
git clone https://github.com/MailCore/mailcore2.git
I open the
iOS UI Test.xcodeproj
I run the Build
I get the error
'MailCore/MailCore.h' file not found
I cannot understand why that is happening.
What should I do to get this to build?
Some other sources I have found and followed their instructions are below. None of which fixed this problem.
https://github.com/MailCore/mailcore2/issues/316
https://github.com/MailCore/MailCore/issues/19
https://github.com/MailCore/mailcore2/issues/276
I also was able to open the
mailcore2.xcodeproj
and successfully build each of the targets. Which is interesting that I can do that but cannot build the test project independently.
I also followed the video and read me instructions to add to an existing project and was able to build until I added the
#import <MailCore/MailCore.h>
to one of my files.
UPDATE:
The above process I initiated on my iMac.
On my MacBook Pro after I cloned mailcore2 I opened
mailcore2.xcodeproj
first then did the build on each of the targets.
Then I closed that project.
Opened the iOS UI Test.xcodeproj and did a build on that.
This was successful.
However, I still want to know what would cause the problem with the "file not found"
UPDATE 2:
I removed to trash all mailcore2 code from my iMac.
I created different locations in Finder for doing another clone of mailcore2.
I did the git clone.
I opened mailcore2.xcodeproj
I followed the exact same process of building each target like I did on my MacBook
I then opened the iOS UI Test.xcodeproj and did a build.
I get the same problem of
'MailCore/MailCore.h' file not found
Makes no sense to me how it works on macbook but not on iMac.

Answer 1

You can add in target dependency static mailcore ios(mailcore2).
and add the framework libmailcore-ios.a
Its working.

Answer 2

What I finally did was drop mailcore2 into an existing app I already had started.
To do this I did the following:
I removed all traces of mailcore2
I again followed the instructions in the README and the video help.
This time I followed some instructions from
https://github.com/MailCore/mailcore2/issues/276
The instructions in that link says to add the following to Library Search Path:
$(PROJECT_DIR)/mailcore2/Externals/ctemplate-ios/lib
$(PROJECT_DIR)/mailcore2/build-mac/build/Debug-iphonesimulator
And the Header Search Path to
$(PROJECT_DIR)/mailcore2/build-mac/build/Debug-iphonesimulator/include - recursively
But, that did not work for me. I had to add the HARD CODED PATH to each of those 3 folders.
After doing a clean and build I was then able to add the
#import <MailCore/MailCore.h>
Now it BUILDs completely without error for me.
I will go back and try to add proper relative paths to each of those Search Paths.
Hopefully this helps somebody else with same issue.

Answer 3

FWIW
Had same problem, spend hours trying - nothing worked, not ever hardcoding paths.
Then I stumbled on one issue:
if in XCode\Preferences\Locations I go to Derived Data - Advanced and set it to different locations it always reverts it to Unique, when I go back and check it.
Then I went in File\Project Setting to Derived Data - Advanced and there it was set to Unique. I changed it there to Default and now it does not have that issue anymore!
I delete Derived data, clean project and Start build (Ctrl+B) and I can see now how Build is being created in derived data w/o problems. And that what mailcore needs to function.
And, I checked - no need for hardcoded paths either!
Hope it helps somebody.
PS Another feature maybe useful too - XCode\Preferences\Continue building after error though it did not matter in my case