Qpprocess class

QStringList Used to set parameters of external programs . It can also be done through setArguments() To set up ( Need to call start Previous call ).
QString program = "./path/to/program"; // Use double slash or not ?

QStringList arguments;
arguments << "-style" << "fusion"; // No spaces are required ?

QProcess *myProcess = new QProcess(this);
myProcess->start(program,arguments);

After the program starts running , issue started() The signal .QProcess But put one process As a sequence IO To treat , Therefore, it can be read and written , namely write(), read(), readLine() as well as getChar().process after , issue finished() The signal .finished The parameters of the signal include exitCode and exitStatus, Use them separately exitCode() and exitStatus() To obtain a .process after , You can still continue to read the buffer .

QProcess You can handle relative paths and absolute paths . Absolute path is recommended . for example ：
QString program_path = QCoreApplication::applicationDirPath();
QString program = program_path + "./program";
Programs can use no extension exe, This can be achieved linux and windows Platform independent features . Besides , You can use all of /,QProcess Will be in windows Upper automatic change to \.

QProcess Can read standard output and standard error Output . If there is output , Will be issued readyReadStandardOutput() and readyReadStandardError() The signal , have access to readAllStandardOutput() or readAllStandardError() To read all the data .