如何使用Core Text从文件加载字体(TTF)？

Question

在OSX 10.6之前,ATSFontActivateFromFileSpecification/ATSFontActivateFromFileReference可用,可用于从文件加载字体.我在Core Text中找不到类似的东西.

Answer 1

您可以通过以下方式CTFontRef从字体文件中获取CGFontRef:

CFURLRef url = CFURLCreateWithFileSystemPath(kCFAllocatorDefault, CFSTR("/path/to/font"), kCFURLPOSIXPathStyle, false);
CGDataProviderRef dataProvider = CGDataProviderCreateWithURL(url);
CGFontRef theCGFont = CGFontCreateWithDataProvider(dataProvider);
CTFontRef theCTFont = CTFontCreateWithGraphicsFont(theCGFont);
CFRelease(theCGFont);
CFRelease(dataProvider);
CFRelease(url);

// do something with the CTFontRef here

CFRelease(theCTFont);   

Answer 2

它看起来像CTFontManagerCreateFontDescriptorsFromURLCore Text替代品.

Answer 3

以下是 2020 年如何执行此操作的更新版本。现在简单多了。使用 12 作为任意字体大小。

let fontURL = URL(fileURLWithPath: "path/to/font.otf")
let fd = CTFontManagerCreateFontDescriptorsFromURL(fontURL as CFURL) as! [CTFontDescriptor]
let theCTFont = CTFontCreateWithFontDescriptor(fd[0], 12.0, nil)

Answer 4

NSURL *fontURL = [[NSBundle mainBundle] URLForResource:@"Crystal" withExtension:@"ttf"];
    assert(fontURL);
    CFErrorRef error = NULL;
    if (!CTFontManagerRegisterFontsForURL((__bridge CFURLRef)fontURL, kCTFontManagerScopeProcess, &error))
    {
        CFShow(error);
        abort();
    }