MTAnimation Cocoapod crashes in Xcode 6

[thebarndog]

Compiling a project using MTAnimation in Xcode 6 produces a bunch of errors, a lot about expected identifiers and unknown type name "NSString". I think it has something to do with Metal and QuartzCore but it's not a super pressing issue since it's in beta still.

[jtmarmon]

+1

[thebarndog]

I think I've figured it out, MTAnimation has .c files and the Swift compiler just shits the bed when trying to figure it out.

[atomkirk]

Oh great 😦 I haven't don't anything in swift yet and probably won't until it's out of beta, but then I will update this project to work with swift or rewrite it in swift. Sorry about that.

[glenstorey]

I don't think this is a problem to do with swift, since I'm using xCode 6 DP6 but not swift and experiencing the issue when building for a device. I think you guys are right though - it's something to do with including .c files.

[thebarndog]

From my understanding, the Swift compiler can compile C code when its embedded in Objective-C code since Objective-C is a strict super set of C. The problem comes in with .c files, I don't think it's supported. Although I'd be curious to know how Apple implements their C APIs. Can't wait to see MTAnimation in Swift by the way, by far my favorite animation library.

[glenstorey]

Yeah - I just don't know if this problem is caused by swift at all (I agree - it'd be cool to see this library in swift). This is the sort of error you get when you include ObjC headers in a C file, isn't it? (It's totally possible that I'm off on some tangent and my problem is unrelated to this thread, or that I've done something stupid, or that it's Friday).

[thebarndog]

It's only Thursday where I am so stupidity nullified! Yeah I'm not sure although they're likely related.

[atomkirk]

Ok I'm working on this problem now. I don't think it has to do with c files, cause I made them legit .m files with dummy class and get the same problem. I've tried everything. An annoying work around is to open the pod specific target build settings and turn off modules. But you have to do that after every pod install/update. Seems like a compiler or cocoa pods bug. I lean towards compiler bug. Can't figure it out.

[atomkirk]

Happens when cocoa pods is not used. Unrelated to cocpapods

[RyanNelwan]

Heads up; I was able to get this to work by changing the two c source files to objective-c.

MTMatrixInterpolation.c -> MTMatrixInterpolation.m
MTTimingFunctions.c -> MTTimingFunctions.m

Built and ran without any issues from the compiler. However, there were some unusual behaviors with the 64-bit processors; animation duration appears to be a lot slower. I was only able to test this in the simulator, not sure if the actual device running on A7 will produce the same results.

[atomkirk]

I can get it to compile for the simulator as is, it's compiling for devices that causes problems

[RyanNelwan]

I was able to compile onto my iPhone 5c without any issues. I'll try on the 5s next.

[scastro]

I can confirm that renaming the files solves the issue

[boozi2]

also confirming that renaming the files compiles on 5s with iOS8

[mitchellporter]

Can anyone confirm whether this works on Xcode 6.1, iOS 8, and the iPhone 6?