C++ 将 std::string 转换为 QString
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Convert std::string to QString
提问by Fred Foo
回答by Hymanpap
QString::fromStdString(content)is better since it is more robust. Also note, that if std::stringis encoded in UTF-8, then it should give exactly the same result as QString::fromUtf8(content.data(), int(content.size())).
QString::fromStdString(content)更好，因为它更健壮。另请注意，如果std::string以 UTF-8 编码，则它应该给出与QString::fromUtf8(content.data(), int(content.size())).
回答by Michael Mrozek
回答by Tarod
Usually, the best way of doing the conversion is using the method fromUtf8, but the problem is when you have strings locale-dependent.
通常，进行转换的最佳方法是使用fromUtf8方法，但问题是当您具有依赖于语言环境的字符串时。
In these cases, it's preferable to use fromLocal8Bit. Example:
在这些情况下，最好使用fromLocal8Bit。例子：
std::string str = "?xample";
QString qs = QString::fromLocal8Bit(str.c_str());
回答by maxa
Since Qt5fromStdString internally uses fromUtf8, so you can use both:
由于Qt5fromStdString 内部使用 fromUtf8，因此您可以同时使用两者：
inline QString QString::fromStdString(const std::string& s)
{
return fromUtf8(s.data(), int(s.size()));
}
