C++ 如何使用QScopedPointer
我举了一个例子C++ 如何使用QScopedPointer,c++,qt,qscopedpointer,C++,Qt,Qscopedpointer,我举了一个例子 QApplication app(argc,argv); QStandardItemModel* model = new QStandardItemModel(r,c,&app); 但在我的节目里我有 QScopedPointer<QApplication> app(createApplication(argc, argv)); QStandardItemModel* model = new QStandardItemModel(r,c,&app);
QApplication app(argc,argv);
QStandardItemModel* model = new QStandardItemModel(r,c,&app);
但在我的节目里我有
QScopedPointer<QApplication> app(createApplication(argc, argv));
QStandardItemModel* model = new QStandardItemModel(r,c,&app); //ERROR: no matching function
如何正确使用此QScopedPointer?使用app.data。虽然在堆上创建QApplication是非常罕见的…使用app.data。虽然在堆上创建QApplication是非常罕见的…希望有用
QScopedPointer<QApplication> app(createApplication(argc, argv));
QStandardItemModel* model = new QStandardItemModel(r,c,app.data());
希望有用
#include <QScopedPointer>
class target
{
public:
int var;
};
class logic
{
public:
QScopedPointer<target> variable;
target* variable2;
};
int main()
{
logic LogicClass;
LogicClass.variable.reset(new target);
LogicClass.variable->var=10;
cout<<LogicClass.variable->var<<endl;
LogicClass.variable2 = new target;
LogicClass.variable2->var = 20;
cout<<LogicClass.variable2->var<<endl;
delete LogicClass.variable2;
return 0;
}