问题:

I'm trying to create QTextEdit with some text, and in this text I have end of line characters (\n), but it is not accepted in QTextEdit object (whole text is displayed without any breaks). Any reason why?

回答1:

If you're using Qt 4.3 or later, then you can use setPlainText(const QString &text)

You can turn off rich text editing with setAcceptRichText(bool accept) (Qt 4.1 or later)

回答2:

Per the docs, if you setTextFormat(PlainText) you should get what you want -- quoting with added emphasis:

QTextEdit works on paragraphs and characters. A paragraph is a formatted string which is word-wrapped to fit into the width of the widget. By default when reading plain text, one newline signify a paragraph. A document consists of zero or more paragraphs, indexed from 0. Characters are indexed on a per-paragraph basis, also indexed from 0. The words in the paragraph are aligned in accordance with the paragraph's alignment(). Paragraphs are separated by hard line breaks. Each character within a paragraph has its own attributes, for example, font and color.