I have this simple "interface" for some plugins I want to develop, it looks like:
class TestPluginBase : public QObject
{
Q_OBJECT
public:
TestPluginBase();
qint64 returnType(){return PluginType;}
protected:
qint64 PluginType;
};
And some other classes which implement the "interface" like:
class TestPluginONE : public TestPluginBase
{
public:
TestPluginONE() {this->PluginType =1;}
qint64 returnType() {return this->PluginType;}
};
Then I have another function which suppose to load different plugins:
qint64 TestPluginManager::loadPlugin(QObject *_plugin)
{
TestPluginBase *Plugin = qobject_cast<TestPluginBase *>(_plugin);
if ( !Plugin )
return 0;
emit sigPluginLoaded(Plugin);
return Plugin->returnType();
}
But when building it I get void value not ignored as it ought to be
and Qt creator says instantiated from the line I'm doing my cast... can't figure out what I'm doing wrong...any help/hint is appreciated.
在“接口”中将构造函数修改为TestPluginBase() {this->PluginType =0;}
,并且代码正在编译,没有错误..解决了我的问题,但不知道为什么。
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