CGPathRef from string

Question

Please how can we get path of particular arabic of french letter ? I\'ve just found out that CTFontCreatePathForGlyph will give CGPathRef like, but its will be the outline of te

Answer 1

I needed this in Swift but it was painful to work out. I hope this is useful to someone else! I've written it as extensions to String and NSAttributedString to be more versatile.

You might see the letters as upside-down depending on how you're drawing your path. You can fix this by adding a vertical flip transform to the call to CTFontCreatePathForGlyph() (a vertical flip is just a CGAffineTransform with a scaleY of -1).

public extension String {
    func path(withFont font: UIFont) -> CGPath {
        let attributedString = NSAttributedString(string: self, attributes: [.font: font])
        let path = attributedString.path()
        return path
    }
}

public extension NSAttributedString {
    func path() -> CGPath {
        let path = CGMutablePath()

        // Use CoreText to lay the string out as a line
        let line = CTLineCreateWithAttributedString(self as CFAttributedString)

        // Iterate the runs on the line
        let runArray = CTLineGetGlyphRuns(line)
        let numRuns = CFArrayGetCount(runArray)
        for runIndex in 0..