問題描述
我正在嘗試做這樣的事情:
I am trying to do something like this:
QString string;
// do things...
std::cout << string << std::endl;
但代碼無法編譯.如何將 qstring 的內容輸出到控制臺(例如出于調試目的或其他原因)?如何將QString 轉換為std::string?
but the code doesn't compile.
How to output the content of qstring into the console (e.g. for debugging purposes or other reasons)? How to convert QString to std::string?
推薦答案
將 QString 轉換為 std::string 時應該記住的一件事是QString 是 UTF-16 編碼，而 std::string... 可以有任何編碼.
One of the things you should remember when converting QString to std::string is the fact that QString is UTF-16 encoded while std::string... May have any encodings.
所以最好的是:
QString qs;
// Either this if you use UTF-8 anywhere
std::string utf8_text = qs.toUtf8().constData();
// or this if you're on Windows :-)
std::string current_locale_text = qs.toLocal8Bit().constData();
如果您指定編解碼器，建議(接受)的方法可能會起作用.
The suggested (accepted) method may work if you specify codec.
參見:http://doc.qt.io/qt-5/qstring.html#toLatin1
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