msedge.exe退出怎么监听
时间: 2024-09-20 07:02:38 浏览: 37
在Qt中,`QProcess`类提供了一些信号来监控其状态变化,包括当子进程(如`msedge.exe`)退出时。你可以通过连接这些信号来监听退出事件。以下是关键步骤:
1. 创建`QProcess`实例并启动`msedge.exe`:
```cpp
QProcess edgeProcess;
QString cmd = "msedge.exe path_to_your_pdf.pdf"; // 替换为实际PDF路径
edgeProcess.start(cmd);
```
2. 连接`QProcess`的`finished`信号,该信号会在进程完成(无论是正常退出还是由于错误)时发送:
```cpp
QObject::connect(&edgeProcess, &QProcess::finished, [] (int exitCode) {
if (exitCode == 0) {
qDebug() << "Edge process finished successfully.";
} else {
qWarning() << "Edge process finished with error code: " << exitCode;
}
});
```
这里的`[]`表示使用lambda表达式创建槽函数,接收`exitCode`作为参数。
3. 如果你想获取详细的输出和错误信息,可以分别连接`readyReadStandardOutput`和`readyReadStandardError`信号,读取它们的内容:
```cpp
QObject::connect(&edgeProcess, &QProcess::readyReadStandardOutput, [this] () {
QByteArray output = this->edgeProcess.readAllStandardOutput();
qDebug() << "Standard Output: " << output.data();
});
QObject::connect(&edgeProcess, &QProcess::readyReadStandardError, [this] () {
QByteArray error = this->edgeProcess.readAllStandardError();
qDebug() << "Standard Error: " << error.data();
});
```
这将实时打印`msedge.exe`的标准输出和错误输出。
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