window和Linux处理是不同的转义 qt助手上是如下写的
The program string can also contain quotes, to ensure that arguments containing spaces are correctly supplied to the new process. For example:
QProcess process;
process.start("dir \"My Documents\"");
If the QProcess object is already running a process, a warning may be printed at the console, and the existing process will continue running.
Note that, on Windows, quotes need to be both escaped and quoted. For example, the above code would be specified in the following way to ensure that "My Documents" is used as the argument to the dir executable:
QProcess process;
process.start("dir \"\"\"My Documents\"\"\"");