c++ - LeapMotion、Qt 和信号

Question

我正在 Mac OS X 上使用 Leap 和 Qt 并且我试图在手指定位时发出信号改变了。

我正在(尝试)使用 QObject 执行此操作:

class SampleListener : public Leap, public QObject{ 
     Q_Object

     class def }

但是moc_SampleListener编译后出现问题:

moc_SampleListener.cpp:94:18: error: no member named 'staticMetaObject' in 'Leap::Listener'
    { &Listener::staticMetaObject, qt_meta_stringdata_PhLeap.data,
       ~~~~~~~~~~^
moc_SampleListener.cpp:111:22: error: no member named 'qt_metacast' in 'Leap::Listener'
    return Listener::qt_metacast(_clname);
           ~~~~~~~~~~^
moc_SampleListener.cpp:116:21: error: no member named 'qt_metacall' in 'Leap::Listener'
    _id = Listener::qt_metacall(_c, _id, _a);
          ~~~~~~~~~~^

所以我有 2 个问题:

1. 我是否试图以错误的方式发出信号？
2. 我的做法是否正确，但存在假人错误？

Answer 1

使用Q_OBJECT宏

http://qt-project.org/doc/qt-5.0/qtcore/qobject.html#Q_OBJECT

The Q_OBJECT macro must appear in the private section of a class definition that declares its own signals and slots or that uses other services provided by Qt's meta-object system.

哦，还有，QObject must be the first inherited class