C++ 错误C2248:&x27;CObject::CObject';:无法访问类';CObject';afxwin.h
我试图让班级负责在灰色背景上添加一些文字: 得分.hC++ 错误C2248:&x27;CObject::CObject';:无法访问类';CObject';afxwin.h,c++,mfc,C++,Mfc,我试图让班级负责在灰色背景上添加一些文字: 得分.h #pragma once class Score { public: Score(); ~Score(); void UpdateScore(int points); void UpdateLives(int lives); int GetScore(){ return m_iScore; } int GetLives(){ return m_iLives; } void GetScor
#pragma once
class Score
{
public:
Score();
~Score();
void UpdateScore(int points);
void UpdateLives(int lives);
int GetScore(){ return m_iScore; }
int GetLives(){ return m_iLives; }
void GetScoreText();//CString
void GetLivesText();
CRect GetArea(){ return m_Area; }
void SetArea(int MaxWidth, int MaxHeight, int Width);
void DrawScore(CDC* pDC);
CPoint GetText1Area(){ return m_ptText1; }
CPoint GetText2Area(){ return m_ptText2; }
COLORREF GetText1Color(){ return COLOR_TXT1; }
COLORREF GetText2Color(){ return COLOR_TXT2; }
COLORREF GetScoreColor(){ return GREY; }
CFont GetFont(){ return m_Font; }
private:
CRect m_Area;
CPoint m_ptText1;
CPoint m_ptText2;
int m_iScore;
int m_iLives;
CString m_sScore;
CString m_sLives;
CFont m_Font;
const COLORREF COLOR_TXT1 = RGB(0, 255, 127);//lives txt color
const COLORREF COLOR_TXT2 = RGB(50, 205, 50);//score txt color
const COLORREF GREY = RGB(128, 128, 128);// bg color
};
得分.cpp
#include"stdafx.h"
Score::Score()
{
m_iScore = 0;
m_iLives = 1;
m_Font.CreateFont(
12, // nHeight
0, // nWidth
0, // nEscapement
0, // nOrientation
FW_NORMAL, // nWeight
FALSE, // bItalic
FALSE, // bUnderline
0, // cStrikeOut
ANSI_CHARSET, // nCharSet
OUT_DEFAULT_PRECIS, // nOutPrecision
CLIP_DEFAULT_PRECIS, // nClipPrecision
DEFAULT_QUALITY, // nQuality
DEFAULT_PITCH | FF_SWISS, // nPitchAndFamily
_T("Arial")); // lpszFacename
}
Score::~Score()
{
m_Font.DeleteObject();
}
void Score::GetScoreText()
{
char c[20];
sprintf_s(c, "Score: %d", m_iScore);
m_sScore.Format(_T("%S"), c);
//return m_sScore;
}
void Score::GetLivesText()
{
char c[20];
sprintf_s(c, "Lives: %d", m_iLives);
m_sLives.Format(_T("%S"), c);
//return m_sLives;
}
void Score::SetArea(int MaxWidth, int MaxHeight, int Width)
{
m_Area = CRect(Width, 0, MaxWidth, MaxHeight);
m_ptText1 = CPoint(static_cast<int>(Width * 1.1), static_cast<int>(MaxHeight * 0.1));
m_ptText2 = CPoint(static_cast<int>(Width * 1.1), static_cast<int>(MaxHeight * 0.2));
}
void Score::DrawScore(CDC* pDC)
{
GetLivesText();
GetScoreText();
CPen pen2(PS_SOLID, 0, GREY);
CBrush brush2(GREY);
CPen* pOldPen = pDC->SelectObject(&pen2);
CBrush* pOldBrush = pDC->SelectObject(&brush2);
pDC->Rectangle(m_Area);
pDC->SelectObject(pOldPen); //resetting default Pen
pDC->SelectObject(pOldBrush); //resetting default Brush
CFont *pPrevFont = pDC->SelectObject(&m_Font);
pDC->SetTextColor(COLOR_TXT1);
pDC->TextOut(m_ptText1.x, m_ptText1.y, m_sLives);
pDC->SetTextColor(COLOR_TXT2);
pDC->TextOut(m_ptText2.x, m_ptText2.y, m_sScore);
pDC->SelectObject(pPrevFont);
}
#包括“stdafx.h”
分数::分数()
{
m_iScore=0;
m_iLives=1;
m_Font.CreateFont(
12,//n好的
0,//nWidth
0,//nEscapement
0,//无定向
FW_正常,//nWeight
FALSE,//bItalic
FALSE,//bUnderline
0,//cStrikeOut
ANSI_字符集,//nCharSet
OUT\u DEFAULT\u precision,//nOutPrecision
剪辑\u默认值\u精度,//n剪辑精度
默认质量,//n质量
默认音高| FF(瑞士//nPitchAndFamily
_T(“Arial”);//lpszFacename
}
分数::~Score()
{
m_Font.DeleteObject();
}
void Score::GetScoreText()
{
charc[20];
sprintf_s(c,“分数:%d”,m_是分数);
m_sScore.Format(_T(“%S”),c);
//返回m_sScore;
}
无效分数::GetLivesText()
{
charc[20];
短跑(c,“生命:%d”,m___________;s);
m_sLives.Format(_T(“%S”),c);
//返回m_切片;
}
无效分数::设置区域(int-MaxWidth、int-MaxHeight、int-Width)
{
m_面积=正确(宽度,0,最大宽度,最大高度);
m_ptText1=CPoint(静态_投射(宽度*1.1),静态_投射(最大高度*0.1));
m_ptText2=CPoint(静态_投射(宽度*1.1),静态_投射(最大高度*0.2));
}
无效分数::DrawScore(CDC*pDC)
{
GetLivesText();
GetScoreText();
CPen pen2(PS_固体,0,灰色);
CBrush笔刷2(灰色);
CPen*pOldPen=pDC->SelectObject(&pen2);
CBrush*pOldBrush=pDC->SelectObject(&brush2);
pDC->矩形(m_区域);
pDC->选择对象(pOldPen);//重置默认笔
pDC->SelectObject(pOldBrush);//重置默认笔刷
CFont*pPrevFont=pDC->SelectObject(&m_-Font);
pDC->SetTextColor(COLOR_TXT1);
pDC->TextOut(m_ptText1.x,m_ptText1.y,m_sLives);
pDC->SetTextColor(COLOR_TXT2);
pDC->TextOut(m_ptText2.x、m_ptText2.y、m_sScore);
pDC->SelectObject(pPrevFont);
}
关于这个错误,我能说的就是它应该在这个类中(错误指向afhwin.h)。从其他问题来看,它通常与私有构造函数或字符串相连接。这里字符串属于类,所以它不应该是问题,我也不知道哪里可以称为私有构造函数(因为现在这个类在其他类中没有对象)。请告诉我这里出了什么问题。您的GetFont函数按值返回一个CFont,改为按指针的引用传递它。最终派生自。查看
CObject
的定义(参见afx.h),您会发现以下注释:
// Disable the copy constructor and assignment by default so you will get
// compiler errors instead of unexpected behaviour if you pass objects
// by value or assign objects.
换句话说:不能按值传递CObject
-派生对象。您的Score::GetFont()
方法正是这样做的。您必须更改以返回引用或指针:
const CFont& GetFont() { return m_Font; }
// or
const CFont* GetFont() { return &m_Font; }