c++ - QProcess::start 和 QProcess::startDetached 之间有什么区别？

Question

Qt 文档给出了这样的解释:

• QProcess::开始:

  Starts the given program in a new process, if none is already running, passing the command line arguments in arguments.

• QProcess::startDetached:

  Starts the program program with the arguments arguments in a new process, and detaches from it.

两者有什么区别？区别仅在于您可以使用 QProcess::start 启动程序的一个实例，而使用 QProcess::startDetached 启动许多实例吗？

Answer 1

如果您使用start，调用进程的终止将导致被调用进程的终止。如果使用startDetached，在调用者终止后， child 会继续存活。例如:

QProcess * p = new QProcess();
p->start("some-app");
delete p;// <---some-app will be terminated

QProcess * p = new QProcess();
p->startDetached("some-app");
delete p;// <---some-app will continue to live