问题描述
我无法在Q_PROPERTY MEMBER中使用自定义类型。
header.h
class Custom {
Q_GADGET
Q_PROPERTY(int mode MEMBER mode STORED true)
public:
Custom();
int mode;
};
class Test {
Q_GADGET
Q_PROPERTY(QString ip MEMBER ip STORED true)
Q_PROPERTY(Custom discovery MEMBER discovery STORED true)
public:
Test();
QString ip;
Custom discovery;
};
Q_DECLARE_METATYPE(Custom)
Q_DECLARE_METATYPE(Test)
main.cpp
#include "header.h"
Test::Test() { qRegisterMetaType<Test>("Test"); }
Custom::Custom() { qRegisterMetaType<Custom>("Custom"); }
int main(int argc,char *argv[]) {
QCoreApplication a(argc,argv);
Test reg;
return a.exec();
}
当我编译代码时,我得到下面的错误。
/testing/build-test-Desktop_Qt_5_12_4_GCC_64bit-Debug/moc_CustomeTypes.cpp:175: error: no match for ‘operator!=’ (operand types are ‘Custom’ and ‘Custom’)
moc_CustomeTypes.cpp:175:31: error: no match for ‘operator!=’ (operand types are ‘Custom’ and ‘Custom’)
if (_t->discovery != *reinterpret_cast< Custom*>(_v)) {
~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
是否必须为自定义类提供 operator!= ?
仅提及一下,如果我将下面的Test类更改为可编译的。
class Test {
Q_GADGET
Q_PROPERTY(QString ip MEMBER ip STORED true)
Q_PROPERTY(Custom discovery READ discovery WRITE setDiscovery STORED true)
public:
Test();
Custom discovery() const { return m_discovery; }
void setDiscovery(const Custom& c) { m_discovery = c; }
QString ip;
Custom m_discovery;
};
为什么不能使用成员作为自定义类型?
解决方法
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