如何将 Swift 字符串传递给 c 函数? [英] How to pass a Swift string to a c function?

问题描述

我在将字符串从 swift 传递到用 c 编写的函数时遇到了严重的问题.

I am having serious trouble passing a string from swift, to a function written in c.

我试图在我的快速代码中做到这一点

I'm trying to do this in my swift code

var address = "192.168.1.2"
var port = 8888

initSocket(address, port)

c 函数如下所示:

void initSocket(char *address, int port);

我收到错误:无法将Void"类型的表达式转换为CMutablePointer"类型

Im getting the error: Cannot convert the expression's of type 'Void' to type 'CMutablePointer'

我似乎找不到有效的解决方案.

I can't seem to find a solution that works.

推荐答案

Swift CStrings 与 C 常量字符串无缝协作，所以使用

Swift CStrings work seamlessly with C constant strings, so use

void initSocket(const char *address, int port);

而不是 char* 参数，并将您的 address 变量声明为 CString:

instead of char* argument, and declare your address variable as CString:

var address: CString = "192.168.1.2";

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