QTextEdit *x =new QTextEdit();
x->setPlainText("hi");
然后编译时提示:
QTextCursor::setPosition: Position '3' out of range
如果换成:
QTextEdit *x =new QTextEdit();
x->insertPlainText("hi");
没有提示
而且这样:
QTextEdit *x =new QTextEdit();
x->clear();又有提示
QTextCursor::setPosition: Position '1' out of range
请问这是怎么回事啊?谢谢!