x/mobile: reverse and swift

[gedw99]

Please answer these questions before submitting your issue. Thanks!

What version of Go are you using (go version)?

1.8

What operating system and processor architecture are you using (go env)?

x-MacBook-Pro:gosync apple$ go env
GOARCH="amd64"
GOBIN=""
GOEXE=""
GOHOSTARCH="amd64"
GOHOSTOS="darwin"
GOOS="darwin"
GOPATH="/Users/apple/workspace/go"
GORACE=""
GOROOT="/usr/local/opt/go/libexec"
GOTOOLDIR="/usr/local/opt/go/libexec/pkg/tool/darwin_amd64"
GCCGO="gccgo"
CC="clang"
GOGCCFLAGS="-fPIC -m64 -pthread -fno-caret-diagnostics -Qunused-arguments -fmessage-length=0 -fdebug-prefix-map=/var/folders/wp/ff6sz9qs6g71jnm12nj2kbyw0000gp/T/go-build775985182=/tmp/go-build -gno-record-gcc-switches -fno-common"
CXX="clang++"
CGO_ENABLED="1"
PKG_CONFIG="pkg-config"
CGO_CFLAGS="-g -O2"
CGO_CPPFLAGS=""
CGO_CXXFLAGS="-g -O2"
CGO_FFLAGS="-g -O2"
CGO_LDFLAGS="-g -O2"

What did you do?

More a question. Gomobile reverse works well for Android, but i was wondering how to do it for swift.

What did you expect to see?

What did you see instead?

[bradfitz]

As far as I know there is no Swift support, nor anybody working on it.

/cc @eliasnaur

[gedw99]

I ask because swift is similar to golang and much more modern compared to objective-c. This makes it much easier to use.

https://github.com/golang/mobile/blob/master/internal/importers/objc/objc.go

[eliasnaur]

Is there a specific problem you're trying to solve that you can't today? Go Mobile only generates ObjC bindings, but I know several projects that have used those with Swift with relative ease (Apple specifically designed Swift to be easy to interface with legacy Obj-C code). Moreover, the way to interface swift with C (and thus, Cgo) is with Obj-C bridges anyway; as far as I know, Swift doesn't interface with C directly.

[gedw99]

The issue is doing golang to native flow.

I can call from native to golang using the gomobile bind technqiue. That allows me to run a web view for example with a localhost webserver responding.
In the same project i need to call from golang to native using the reverse techniques. For example fire a notification to the user. I can do this with objective c. i am guessing that its possible to mix swift and objective c ?

[eliasnaur]

Sure. Apple has more information about objective-c bridging at their developer site. Den tir. 4. apr. 2017 16.02 skrev gedw99 <notifications@github.com>:

…

The issue is doing golang to native flow. I can call from native to golang using the gomobile bind technqiue. That allows me to run a web view for example with a localhost webserver responding. In the same project i need to call from golang to native using the reverse techniques. For example fire a notification to the user. I can do this with objective c. i am guessing that its possible to mix swift and objective c ? — You are receiving this because you were mentioned. Reply to this email directly, view it on GitHub <#19830 (comment)>, or mute the thread <https://github.com/notifications/unsubscribe-auth/AAgCDCfgNoTzyy1YUpyplud0VqxDvg-Fks5rsk2FgaJpZM4MyAuy> .

[rusenask]

Hi @gedw99, did you come up with any solution for this?

[gedw99]

no. i swifted to using flutter for mobile and desktops.
you can access golang from flutter btw