如何重置QFile/ QTextStream？

Question

我正在获取一个文件，以便在第一次读取后重置。所有的谷歌搜索都没有任何帮助。

如何在第一次读取文件后将其重置为begin？

试验一：

        inFile = QFile( self._pathFileName )
        inFile.open(QFile.ReadOnly | QFile.Text)
        stream = QTextStream(inFile)
        
        # Count first all lines in the file
        self._numLinesRead = 0
        self._mumLinesTotal = 0
        while not stream.atEnd():
            self._mumLinesTotal=+1
            stream.readLine();
        
        inFile.seek(0)
        stream.seek(0) 
        pos = stream.pos()   # pos is equal to 0 after this line verified with debugging
        
        while( not stream.atEnd() ):  # but here it still thinks he's at file end and jumps over
            ....

试验二：

        inFile = QFile( self._pathFileName )
        inFile.open(QFile.ReadOnly | QFile.Text)
        stream = QTextStream(inFile)
        
        # Count first all lines in the file
        self._numLinesRead = 0
        self._mumLinesTotal = 0
        while not stream.atEnd():
            self._mumLinesTotal=+1
            stream.readLine();
        inFile.close()
        
        del inFile
        del stream
        inFile = QFile( self._pathFileName )
        inFile.open(QFile.ReadOnly | QFile.Text)
        stream = QTextStream(inFile)
        # everyting has been reset?!
        
        while( not stream.atEnd() ):  # Nop it still thinks it is atEnd and jumps over
            ....

我尝试了在网上找到的所有解决方案。什么都没有用。我哪里做错了？

Answer 1

不知道我应该说什么，但在系统完全重启后，“试用二”起作用了。

在第二次重启之后(两天后进行了大量代码更改)，“试用版一”也恢复了活力。

毕竟:从我的角度来看，这两个试验都是有效和有效的。

如果您在开发和调试过程中发现奇怪的行为，请尝试重新启动。