Swift use c struct

Question

Sorry for the title, I can\'t find words to describe my question in few words.

I already know that swift can use struct written in c. For example

In Bridging-Hea

Answer 1

You should be OK if you include the original header where Pointer is typedef-ed in ___Bridging-Header.h

So for example if you have foo.h where you declare your struct and your functions, then instead of doing any additional typdef calls in your bridging header just #import foo.h

Then your Swift code should be able to see the symbols declared in foo.h

Update:

What you need:

1. Say "foo.h" is the header file where Pointer is typedef-ed. Also say that "foo.c" is the file where createPointer() is implemented.
2. You'll need to create a Swift project in Xcode. Add "foo.h" and "foo.c" to the project.
3. Add a header file to the project called "foo-Bridging-Header.h" (Sometimes Xcode asks if you want to create a Bridging Header when you add a .c or .m file to the project, but with the Developer Seed I haven't observed this to be consistent yet).
4. In "foo-Bridging-Header.h", you'll need to #include foo.h
5. Once you have done this, you should be able to call any of the symbols from "foo.h" from the "main.swift" file in your project.

For example, I have a Swift project. In this project I have a Swift file (main.swift), a C header (test.h), a C source file (test.c), and a Bridging Header (test-Bridging-Header.h).

Their contents are as follows:

1. test.h:

void
printFoo();

1. test.c:

#include 
#include "test.h"

void
printFoo() {
    printf("foo\n");
}

1. test-Bridging-Header.h:

#import "test.h"

1. main.swift:

import Foundation

println("Hello, World!")

printFoo()

When run, this outputs:

Hello, World!
foo