ios - 如何在 swift 中调用 UnitySendMessage 方法？

Question

我尝试使用 swift 语言在我的 iOS Framework 项目中调用 UnitySendMessage 方法，但它显示此错误-

使用未解析的标识符“UnitySendMessage”

这是我的 swift 文件的代码片段-

import Foundation

@objc public class Example : NSObject{

    @objc open static let shared = Example()

    @objc open func printMsg(){
        print("\(#function) is called with message:");
        UnitySendMessage("CallbackTarget", "OnCallFromSwift", "Hello, Unity!");
    }
}

卡在这里，你能告诉我我错过了什么吗？

Answer 1

检查答案here .

UnitySendMessage is in libiPhone-lib.a, and as far as I can tell, the Unity folks don't include any header that declares it.

I just added the following to my code

extern void UnitySendMessage(const char *, const char *, const char *);

If you look at the generated AppController.mm, they basically do the same thing for the various UnitySendXXX functions, rather than including a header.

Having said that, while you will be able to build a library that calls UnitySendMessage, that library probably won't work unless it's linked into a Unity project, since UnitySendMessage is going to require more than just libiPhone-lib.a to actually work.