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A UIFont extension in swift to load fonts from within a bundle
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import UIKit | |
public extension UIFont { | |
class func loadAllFonts(bundleIdentifierString: String) { | |
registerFontWithFilenameString(filenameString: "icon-font.ttf", bundleIdentifierString: bundleIdentifierString) | |
// Add more font files here as required | |
} | |
static func registerFontWithFilenameString(filenameString: String, bundleIdentifierString: String) { | |
if let frameworkBundle = Bundle(identifier: bundleIdentifierString) { | |
let pathForResourceString = frameworkBundle.path(forResource: filenameString, ofType: nil) | |
let fontData = NSData(contentsOfFile: pathForResourceString!) | |
let dataProvider = CGDataProvider(data: fontData!) | |
let fontRef = CGFont(dataProvider!) | |
var errorRef: Unmanaged<CFError>? = nil | |
if (CTFontManagerRegisterGraphicsFont(fontRef, &errorRef) == false) { | |
print("Failed to register font - register graphics font failed - this font may have already been registered in the main bundle.") | |
} | |
} | |
else { | |
print("Failed to register font - bundle identifier invalid.") | |
} | |
} | |
} |
You can add helper methods to this class to make it easier to get your fonts:
class func iconFont(size fontSize: CGFloat) -> UIFont {
if let retval = UIFont(name: "icon-font", size: fontSize) {
return retval;
} else {
return UIFont.systemFont(ofSize: fontSize)
}
}
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NOTE: The
loadAllFonts(bundleIdentifierString:)
method should only be called once. I'd wrap all theregisterFontWithFilenamesString
callse in a dispatch_once method but Swift3 doesn't have it anymore.Possibly use this stackoverflow answer to extend DispatchQueue to add a
DispatchQueue.once