从QTextEdit中删除最后一行 [英] Removing last line from QTextEdit

问题描述

我使用这一段代码尝试从QTextEdit中删除最后一行：

I'm using this bit of code to try to remove the last line from a QText

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

但我得到一个分段错误。调试后，我发现当调用removeRows时，k为null。

but I get a segmentation fault. After debugging I found that that k is null when removeRows is called.

我做错了什么？

推荐答案

请尝试以下方法（测试）：

Try this (Tested):

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);

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