从QTextEdit中删除最后一行

Question

我正在使用这段代码尝试从QTextEdit中删除最后一行:

    ui->textEdit_2->textCursor().setPosition( QTextCursor::End);
    auto k = ui->textEdit_2->textCursor().currentTable();
    k->removeRows(k->rows() - 1, 1);

但是我遇到了分段错误.调试后,我发现当调用removeRows时,k为null.

难道我做错了什么？如果是的话,怎么解决？

Answer 1

试试这个(测试):

ui->textEdit_2->setFocus();
QTextCursor storeCursorPos = ui->textEdit_2->textCursor();
ui->textEdit_2->moveCursor(QTextCursor::End, QTextCursor::MoveAnchor);
ui->textEdit_2->moveCursor(QTextCursor::StartOfLine, QTextCursor::MoveAnchor);
ui->textEdit_2->moveCursor(QTextCursor::End, QTextCursor::KeepAnchor);
ui->textEdit_2->textCursor().removeSelectedText();
ui->textEdit_2->textCursor().deletePreviousChar();
ui->textEdit_2->setTextCursor(storeCursorPos);