C ++：Qt 5.3无法显示UTF-8字符

问题描述

我试图在Visual Studio 2013中使用Qt和C ++在按钮上显示unicode字符（欧元符号）。我尝试下面的代码：

I am trying to display a unicode character (Euro sign) on a button using Qt and C++ in Visual Studio 2013. I tried the following code:

_rotateLeftButton->setText("\u20AC");

和

_rotateLeftButton->setText("€");

和

_rotateLeftButton->setText(QString::fromUtf8("\u20AC"));

和

_rotateLeftButton->setText(QString::fromUtf8("€"));

但是，所有这些行都会导致以下结果：

However, all of those lines result in the following:

我的所有代码文件都是UTF-8编码的，除了moc文件（.cxx）。对于任何原因，moc可执行文件不使用unicode生成它们。然而我不能得到这个unicode符号显示正确。我也尝试设置另一种字体比默认的成功。有没有人知道可能是什么问题？

All my code files are UTF-8 encoded, except for the moc files (.cxx). For whichever reason the moc executable does not generate them using unicode. Yet I was not able to get this unicode symbol displayed correctly. I also tried setting another font than the default one withouth success. Does anyone know what could be the problem?

感谢您的帮助。

推荐答案

QString::fromUtf8("€")

如果文件真的被作为UTF-8处理，将工作。 As @ n.m。评论，VS需要从人工BOM的一些帮助，以确保这一点。

Will work if the file really is handled as UTF-8. As @n.m. commented, VS requires some help from a faux-BOM to ensure this.

QString::fromUtf8("\u20AC")

\u 在字节字符串字面量。您可以使用UTF-8编码版本的 \x 字节转义来拼写：

\u doesn't make sense in a byte string literal. You could spell it using \x byte escapes for the UTF-8 encoded version:

QString::fromUtf8("\xE2\x82\xAC")

或使用宽字符串：

QString::fromWCharArray(L"\u20AC")

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