Download font .ttf file from web and store on iPhone

Question

Is it possible to download .ttf file from web and store it on iPhone. Then use that for for labels and all other stuff ? Because my client want to control fonts from databas

Answer 1

Swift 4 solution by extension:

extension UIFont {

    /**
     A convenient function to create a custom font with downloaded data.

     - Parameter data: The local data from the font file.
     - Parameter size: Desired size of the custom font.

     - Returns: A custom font from the data. `nil` if failure.

     */
    class func font(withData data: Data, size: CGFloat) -> UIFont? {

        // Convert Data to NSData for convenient conversion.
        let nsData = NSData(data: data)

        // Convert to CFData and prepare data provider.
        guard let cfData = CFDataCreate(kCFAllocatorDefault, nsData.bytes.assumingMemoryBound(to: UInt8.self), nsData.length),
            let dataProvider = CGDataProvider(data: cfData),
            let cgFont = CGFont(dataProvider) else {
            print("Failed to convert data to CGFont.")
            return nil
        }

        // Register the font and create UIFont.
        var error: Unmanaged?
        CTFontManagerRegisterGraphicsFont(cgFont, &error)
        if let fontName = cgFont.postScriptName,
            let customFont = UIFont(name: String(fontName), size: size) {
            return customFont
        } else {
            print("Error loading Font with error: \(String(describing: error))")
            return nil
        }

    }
}

Usage:

let customFont = UIFont.font(withData: data, size: 15.0)