C++ Qt-从资源添加自定义字体
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Qt- Add custom font from resource
提问by Farzan Najipour
I added this font to resource: BYekan.ttf
I want to use this font in my application. I've tried this :
我将此字体添加到资源：BYekan.ttf
我想在我的应用程序中使用此字体。我试过这个：
QFont font(":/images/font/BYekan.ttf");
nLabel->setFont(font);
nLabel->setText(tr("This is for test"));
layout->addWidget(nLabel);
But, I guess it's not working. How to use it?
但是，我想它不起作用。如何使用它？
Edit: After reading this question, I've tried again :
编辑：阅读完这个问题后，我又试了一次：
int fontID(-1);
bool fontWarningShown(false);
QFile res(":/images/font/Yekan.ttf");
if (res.open(QIODevice::ReadOnly) == false) {
if (fontWarningShown == false) {
QMessageBox::warning(0, "Application", (QString)"Impossible d'ouvrir la police " + QChar(0x00AB) + " DejaVu Serif " + QChar(0x00BB) + ".");
fontWarningShown = true;
}
}else {
fontID = QFontDatabase::addApplicationFontFromData(res.readAll());
if (fontID == -1 && fontWarningShown == false) {
QMessageBox::warning(0, "Application", (QString)"Impossible d'ouvrir la police " + QChar(0x00AB) + " DejaVu Serif " + QChar(0x00BB) + ".");
fontWarningShown = true;
}
else
nLabel->setFont(QFont(":/images/font/Yekan.ttf", 10));
}
I compare this font and other font, but there isn't any different on Qt. why?
我比较了这种字体和其他字体，但在 Qt 上没有任何不同。为什么？
回答by Ankur
int id = QFontDatabase::addApplicationFont(":/fonts/monospace.ttf");
QString family = QFontDatabase::applicationFontFamilies(id).at(0);
QFont monospace(family);
回答by kyb
In QML you can
在 QML 中，您可以
FontLoader { id: font; source: "/fonts/font.otf" }
回答by Ernie Mur
I had the same problem as reported in the original question. The above presented solution (answer beginning with the line "int id = QFontDatabase::addApplicationFont....) however did not work, as can be also seen in the comments above. addApplicationFont returned -1.
我遇到了与原始问题中报告的相同的问题。上面提出的解决方案（以“int id = QFontDatabase::addApplicationFont....”行开头的答案）但是不起作用，正如上面的评论中所见。addApplicationFont 返回-1。
The reason is, that there is a leading ':' in the string for the call of the function addApplicationFont. I removed this. Now it works for me (testet with Qt 5.5.1 and Qt 4.8.6 on Linux) and returns 0. On Windows it might be necessary to add a drive letter in front.
原因是，在调用函数 addApplicationFont 的字符串中有一个前导“:”。我删除了这个。现在它对我有用（在 Linux 上使用 Qt 5.5.1 和 Qt 4.8.6 进行测试）并返回 0。在 Windows 上，可能需要在前面添加一个驱动器号。
Note: I had to provide the full path to the font file (e.g. /usr/share/fonts/ttf/droid/DroidSansFallbackFull.ttf)
注意：我必须提供字体文件的完整路径（例如 /usr/share/fonts/ttf/droid/DroidSansFallbackFull.ttf）
