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