如何使用 boost::bind 绑定类成员函数？
#include <QtCore/QCoreApplication>
#include <boost/bind.hpp>
#include <boost/function.hpp>
class button
{
public:
boost::function<void()> onClick;
boost::function<void(int ,double )> onClick2;
};
class player
{
public:
void play(int i,double o){}
void stop(){}
};
button playButton, stopButton;
player thePlayer;
void connect()
{
//error C2298: 'return' : illegal operation on pointer to member function expression
playButton.onClick2 = boost::bind(&player::play, &thePlayer);
stopButton.onClick = boost::bind(&player::stop, &thePlayer);
}
int main(int argc, char *argv[])
{
QCoreApplication a(argc, argv);
connect();
return a.exec();
}
#include <QtCore/QCoreApplication>
#include <boost/bind.hpp>
#include <boost/function.hpp>
class button
{
public:
boost::function<void()> onClick;
boost::function<void(int ,double )> onClick2;
};
class player
{
public:
void play(int i,double o){}
void stop(){}
};
button playButton, stopButton;
player thePlayer;
void connect()
{
//error C2298: 'return' : illegal operation on pointer to member function expression
playButton.onClick2 = boost::bind(&player::play, &thePlayer);
stopButton.onClick = boost::bind(&player::stop, &thePlayer);
}
int main(int argc, char *argv[])
{
QCoreApplication a(argc, argv);
connect();
return a.exec();
}
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评论（2）
您需要对两个参数使用占位符：
占位符允许您说“我仅绑定某些参数；稍后将提供其他参数”。
You need to use placeholders for the two arguments:
The placeholders allow you to say "I'm only binding certain arguments; other arguments will be provided later."
如果您想创建可移植代码 - 直接指定占位符的命名空间：
And if you want create portable code - specify namespace of placeholders directly: