在 Class 中创建对象

Creating object(s) within a Class

我有这个问题:

问题:

WiFiServer myServer(iPort);

'myServer' was not declared in this scope

Where/how 我是否声明 myServer 以便整个 class (ard33WiFi) 可用?我已经删除了任何声明,因为无论我尝试什么都是错误的。我在下面粘贴了一个框架代码。

// HEADER FILE (.h)
// ----------------------------------------------------------------------------------------------
#ifndef Ard33WiFi_h
#define Ard33WiFi_h

#include <WiFiNINA.h>
#include <WiFiUdp.h>

class ard33WiFi{
  public:
    ard33WiFi(int iPort)

    void someFunction();
    void serverBegin();

  private:
    int _iPort;

};
#endif

// ----------------------------------------------------------------------------------------------
// C++ FILE (.cpp)
// -----------------------------------------------------------------------------------------------
#include <Ard33Wifi.h>

ard33WiFi::ard33WiFi(int iPort){
  _iPort = iPort;
}
void ard33WiFi::someFunction(){
  // code here required to prepare the server for initializing
  // but ultimately not relevant to the question
}
void ard33WiFi::serverBegin(){
  myServer.begin();
  Serial.println("Server Online");
}

我 运行 遇到了与 UDP 库相同的问题,因为我需要在各种函数中调用 UDP 对象来执行 UDP 操作。

如有任何帮助,我们将不胜感激。

我想你正在使用这个:

https://www.arduino.cc/en/Reference/WiFiServer

我看到您没有在 class 中声明 myServer;我猜是你的代码中的错误。如果我没记错的话,应该是这样的:

#ifndef Ard33WiFi_h
#define Ard33WiFi_h

#include <WiFiNINA.h>
#include <WiFiUdp.h>
#include <WiFi.h>  // Not sure if you have to append this include

class ard33WiFi{
  public:
    ard33WiFi(int iPort)

    void someFunction();
    void serverBegin();

  private:
    int _iPort;
    WiFiServer myServer;

};
#endif

实现,需要初始化实例:

#include <Ard33Wifi.h>

ard33WiFi::ard33WiFi(int iPort):myServer(iPort), _iPort(iPort) {
}

void ard33WiFi::someFunction(){
  // code here required to prepare the server for initializing
  // but ultimately not relevant to the question
}
void ard33WiFi::serverBegin(){
  myServer.begin();
  Serial.println("Server Online");
}