1.写一个头文件（仅头文件）
#ifndef _SINGLETON_H_
#define _SINGLETON_H_
template <typename T>
class Singleton
{
public:
static T* getInstance()
{
static T s_instance;
return &s_instance;
}
Singleton(T&&) = delete;
Singleton(const T&) = delete;
void operator= (const T&) = delete;
protected:
Singleton() = default;
virtual ~Singleton() = default;
};
#endif
2.创建一个类继承自上面的类，记得要提供模版参数
class FileFunction : public Singleton<FileFunction>
{
public：
xxx
};
3.调用时，直接通过FileFunction来调用静态方法：FileFunction::getInstance().
标签：Singleton,之一,const,方式,FileFunction,static,单例,public,delete From： https://www.cnblogs.com/ylww/p/17528095.html