visual-c++ - 两个类对​​象之间的 Visual C++/CLI 相互访问？

Question

这是问题所在:

namespace Program1 {
   public ref class Form1 : public System::Windows::Forms::Form
   {
    public: Form1(void) {....}
         private: RunnableThread^ peerThread;

   private: System::Void loginButton_MouseDown(System::Object^  sender, System::Windows::Forms::MouseEventArgs^  e) {
    String^ ip = this->ipTextField->Text;
    String^ port = this->portTextField->Text;
        <.............>
        // Start new thread
        this->peerThread = gcnew RunnableThread("thread2", ip, port, this->gameMatrix, this);
        <..............>
    }
}

   }


// Runnable class
ref class RunnableThread
{
private:
    String^ ip;
    String^ port;
    <...>
    EchoClient3WS::Form1^ refToRootObj;
    <......>
public:
    RunnableThread(String^ threadName, String^ ip, String^ port, GameMatrix^ gameMatrix, Program1::Form1^ rootObj);
    void run();
    void callServer(String^ message);
    void done();
};

我得到了错误:

该行是:

'private: RunnableThread^ peerThread;'

然后错误是:

error C2146: syntax error : missing ';' before identifier 'peerThread' k:\visual studio 2010\projects\program1\program1\Form1.h <....>

看起来

namespace Program1 { public ref class Form: <...> {   
// HERE WE DON'T KNOW ANYTHING ABOUT THE CLASS NAMED 'RunnableThread'

 } }

但我也可以将 'RunnableThread' 声明代码移动到 'namespace Program1' 之前，因为 'RunnableThread' 使用指向创建此类实例的父亲 'Form1' 的指针。

如何解决这个问题呢？

感谢您的任何回答。

Answer 1

在 class Form1 前添加前向声明:

class RunnableThread;

可能与 ref在前。