从目标C调用C++； 我在ObjtoviC.中调用C++中的一些函数有问题。 我有以下代码。在“objCFuncA”中，如何调用“funcBCallback（std:：string inText）”函数？。谢谢

SampleCallback.h

class SampleCallback
{
public:
    static void funcA();
    static void funcBCallback(std::string inText);
};

@interface SampleCallback_iOS : NSObject

+ (SampleCallback_iOS*)shared;

- (void)objCFuncA:(const char*)inString;

@end

SampleCallback.mm

void SampleCallback::funcA()
{
    [[SampleCallback_iOS shared] objCFuncA:"My text from C++"];
}

void SampleCallback::funcBCallback(std::string inText)
{
    NSLog(@"SUCCES GET RETURN");
}

@implementation SampleCallback_iOS

static SampleCallback_iOS* instance = nil;

+ (SampleCallback_iOS*)shared
{
    @synchronized(self) {
        if (instance == nil) {
            instance = [[self alloc] init];
        }
    }
    return instance;
}

- (void)objCFuncA:(const char*)inString
{
    NSLog(@"Text from C++: %s", inString);

    // How to call SampleCallback::funcBCallback?
}
@end

SampleCallback\u iOS.h

class SampleCallback
{
public:
    static void funcA();
    static void funcBCallback(std::string inText);
};

@interface SampleCallback_iOS : NSObject

+ (SampleCallback_iOS*)shared;

- (void)objCFuncA:(const char*)inString;

@end

SampleCallback\u iOS.m

void SampleCallback::funcA()
{
    [[SampleCallback_iOS shared] objCFuncA:"My text from C++"];
}

void SampleCallback::funcBCallback(std::string inText)
{
    NSLog(@"SUCCES GET RETURN");
}

@implementation SampleCallback_iOS

static SampleCallback_iOS* instance = nil;

+ (SampleCallback_iOS*)shared
{
    @synchronized(self) {
        if (instance == nil) {
            instance = [[self alloc] init];
        }
    }
    return instance;
}

- (void)objCFuncA:(const char*)inString
{
    NSLog(@"Text from C++: %s", inString);

    // How to call SampleCallback::funcBCallback?
}
@end

---

<> P>不可能从普通ObjuleC调用C++函数（就像你不能从C中调用C++）。

---

不过，您可以将Objective-C文件转换为Objective-C++。为此，只需将文件重命名为使用扩展名

.mm

而不是

.m
，您必须将SampleCallback_iOS.m重命名为.mm，然后使用
#include“SampleCallback.h”
，这与
SampleCallback:：funcBCallback（“您的文本”）一样简单