//移动光标到末尾
QTextCursor cursor = ui->receiveTextEdit->textCursor();
cursor.movePosition(QTextCursor::End);
ui->receiveTextEdit->setTextCursor(cursor);
//移动光标到末尾
QTextCursor cursor = ui->receiveTextEdit->textCursor();
cursor.movePosition(QTextCursor::End);
ui->receiveTextEdit->setTextCursor(cursor);