我的代碼出現在下面。當我嘗試編譯,我得到:QAbstractButton和QPushButton之間的比較*缺少轉換
error: 29:38 comparison between distinct pointer types QAbstractButton and QPushButton* lacks a cast -> 'if (stdmetBox.clickedButton() == stdButton)'
系統:亞馬遜Kindle Fire 7" 運行CyanogenMod的11.0(是Android 4.4.2奇巧) 編譯:G ++/GCC(海灣合作委員會爲C4droid插件4.9.1版本) IDE:C4droid與SDL,GCC,以及插件部長
任何幫助將不勝感激我已經搜查,但我能找到的唯一實例是iOS的具體
#include <fstream>
#include <QApplication>
#include <QLabel>
#include <QMessageBox>
#include <QString>
#include <QAbstractButton>
#include <QInputDialog>
#include <QDebug>
using namespace std;
int setup()
{
string unitchar;
string unitcharo;
bool setupSuccess;
int returncode;
QMessageBox msgBox;
QMessageBox stdmetBox;
QMessageBox ynBox;
msgBox.setText("Welcome to Tyler's Fitness App! This app will help you with your fitness goals, whatever they may be. Let's get you set up!");
msgBox.exec();
QPushButton *stdButton = stdmetBox.addButton(QT_TR_NOOP("Standard"), QMessageBox::ActionRole);
QPushButton *metButton = stdmetBox.addButton(QT_TR_NOOP("Metric"), QMessageBox::ActionRole);
stdmetBox.exec();
if (stdmetBox.clickedButton() == stdButton)
{
unitchar = "standard";
unitcharo = "metric";
}
else if (stdmetBox.clickedButton() == metButton)
{
unitchar = "metric";
unitcharo = "standard";
}
else
{
setupSuccess = false;
returncode = 0;
return returncode;
}
if (unitchar == "standard")
{
ynBox.setInformativeText("Standard units include feet, miles, mph, pounds, etc.");
}
else
{
ynBox.setInformativeText("Metric units include meters, kilometers, kph, kilograms, etc.");
}
QPushButton *yesButton = ynBox.addButton(QT_TR_NOOP("Yes"), QMessageBox::ActionRole);
QPushButton *noButton = ynBox.addButton(QT_TR_NOOP("No"), QMessageBox::ActionRole);
ynBox.setText("Is that okay?")
while (ynBox.clickedButton() == noButton)
{
if (unitchar == "standard")
{
unitchar = "metric";
unitcharo = "standard";
}
else
{
unitchar = "standard";
unitcharo = "metric";
}
if (unitchar == "standard")
{
ynBox.setInformativeText("Standard units include feet, miles, mph, pounds, etc.");
}
else
{
ynBox.setInformativeText("Metric units include meters, kilometers, kph, kilograms, etc.");
}
result = ynBox.exec();
}
if (unitchar == "standard")
{
msgBox.setText("Great! You've selected standard units.");
msgBox.exec();
setupSuccess = true;
}
else
{
msgBox.setText("Great! You've selected metric units.");
msgBox.exec();
setupSuccess = true;
}
if (setupSuccess != true)
{
returncode = 0;
}
else if (unitchar == "standard")
{
returncode = 1;
}
else
{
returncode = 2;
}
return returncode;
}
int main(int argc, char* argv[])
{
QApplication app(argc, argv);
unitmaster = setup();
if ((unitmaster == 1) || (unitmaster == 2))
{
QMessageBox successBox;
successBox.setText("The program has completed successfully!");
successBox.exec();
}
else
{
QMessageBox errorBox;
errorBox.setText("The program has completed successfully!");
errorBox.exec();
}
return app.exec();
}
即使您以需要定義的方式使用QPushButton,您似乎已經忘記了包含''。其中一個頭文件必須聲明它是因爲它被識別爲一個類,但是如果它是不完整的,那麼編譯器不會知道'QPushButton *'可以轉換爲'QAbstractButton *'。嘗試添加缺少的包含,看看是否可以解決您的問題。 –
user2079303
我繼續發佈,作爲答案,因爲我覺得自己很有信心,即使我無法測試自己,這也是您的問題。 – user2079303