QProcess :: start和QProcess :: startDetached之间有什么区别? [英] What is the difference between QProcess::start and QProcess::startDetached?

问题描述

Qt文档给出了以下解释:

The Qt documentation gives this explanation:

• QProcess :: start :

如果没有程序在运行，则以新进程启动给定程序，在参数中传递命令行参数.

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

QProcess :: startDetached :

使用新的arguments参数启动程序过程，并从中分离出来.

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

两者之间有什么区别?区别仅在于您可以使用 QProcess :: start 仅启动一个程序实例，而使用 QProcess :: startDetached 可以启动多个实例吗?

What is the difference between the two? Is the difference only that you can start just one instance of a program using QProcess::start and many instances using QProcess::startDetached?

推荐答案

如果使用 start ，则调用方进程的终止也将导致被调用进程的终止.如果使用 startDetached ，则在终止呼叫者之后，子代将继续存在.例如:

If you use start, termination of the caller process will cause the termination of the called process as well. If you use startDetached, after the caller is terminated, the child will continue to live. For example:

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

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