QMetaObject::connectSlotsByName(this);绑定信号-槽

在阅读obs-studio源码时候，发现好多槽函数并没有通过connect方法绑定到某个信号上，一直很疑惑。继续阅读源码才发现，是利用了Qt中通过约定信号槽命名的方式实现的绑定。

即通过QMetaObject::connectSlotsByName(this);实现。

官方文档中的解释如下：

[static] void QMetaObject::connectSlotsByName(QObject *object)

Searches recursively for all child objects of the given object, and connects matching signals from them to slots of object that follow the following form:

void on_<object name>_<signal name>(<signal parameters>);

Let's assume our object has a child object of type QPushButton with the object name button1. The slot to catch the button's clicked() signal would be:

void on_button1_clicked();

If object itself has a properly set object name, its own signals are also connected to its respective slots.

很简单的英文。