qt - QApplication exec() 创建新的线程/进程？

Question

在 QApplication 中，如果我们调用 exec() 那么是否会启动一个新的进程/线程？

Answer 1

不，调用 exec 将:

Enters the main event loop and waits until exit() is called, then returns the value that was set to exit() (which is 0 if exit() is called via quit()).

It is necessary to call this function to start event handling. The main event loop receives events from the window system and dispatches these to the application widgets.