Qt执行外部程序 [英] Qt Execute external program

问题描述

我想从我的QT-Programm中启动一个外部程序.唯一可行的解​​决方案是:

I want to start an external program out of my QT-Programm. The only working solution was:

system("start explorer.exe");

但是它仅适用于Windows并暂时启动命令行.

But it is only working for windows and starts a command line for a moment.

我尝试的下一件事情是:

Next thing I tried was:

QProcess process;
QString file = QDir::homepath + "file.exe";
process.start(file);
//process.execute(file); //i tried as well

但是什么也没发生.有什么想法吗?

But nothing happened. Any ideas?

推荐答案

如果您的process对象是堆栈上的变量(例如，在方法中)，则该代码将无法正常工作，因为您已经完成了该过程该方法完成后，已经开始的操作将在QProcess的析构函数中被杀死.

If your process object is a variable on the stack (e.g. in a method), the code wouldn't work as expected because the process you've already started will be killed in the destructor of QProcess, when the method finishes.

void MyClass::myMethod()
{
    QProcess process;
    QString file = QDir::homepath + "file.exe";
    process.start(file);
}

您应该在堆上分配 QProcess 对象

You should instead allocate the QProcess object on the heap like that:

QProcess *process = new QProcess(this);
QString file = QDir::homepath + "/file.exe";
process->start(file);

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