     private var _digitsImage:TRZImage?
     public var digitsImage:TRZImage! {
         if (_digitsImage == nil) {
-            _digitsImage = createDigitsImage()
+            _digitsImage = createDigitsImage(self.font)
         }
         return _digitsImage
     }

            UIGraphicsEndImageContext()
        #endif

        if let box = imageCache?.setImage(image, key: cacheKey, font: self.font, color: self.textColor) {
            _cachedDigitsImageBox = box
        }


            return TRZFont(descriptor: newDescriptor, size: 0)
        #endif
    }
    
    var verticallyCenteredColonFont:TRZFont {
        guard #available(iOS 9.0, OSX 10.11, *) else { return self }
        guard self.familyName == TRZFont.systemFontOfSize(self.pointSize).familyName else { return self }
        
        #if os(OSX)
            let descriptor = self.fontDescriptor
            let TRZFontFeatureSettingsAttribute = NSFontFeatureSettingsAttribute
            let TRZFontFeatureTypeIdentifierKey = NSFontFeatureTypeIdentifierKey
            let TRZFontFeatureSelectorIdentifierKey = NSFontFeatureSelectorIdentifierKey
        #elseif os(iOS) || os(tvOS)
            let descriptor = self.fontDescriptor()
            let TRZFontFeatureSettingsAttribute = UIFontDescriptorFeatureSettingsAttribute
            let TRZFontFeatureTypeIdentifierKey = UIFontFeatureTypeIdentifierKey
            let TRZFontFeatureSelectorIdentifierKey = UIFontFeatureSelectorIdentifierKey
        #endif
        
        let attributes = [
            TRZFontFeatureSettingsAttribute: [
                [
                    TRZFontFeatureTypeIdentifierKey: kStylisticAlternativesType,
                    TRZFontFeatureSelectorIdentifierKey: kStylisticAltThreeOnSelector
                ]
            ]
        ]
        
        let newDescriptor = descriptor.fontDescriptorByAddingAttributes(attributes)
        #if os(OSX)
            return TRZFont(descriptor: newDescriptor, size: 0)!
        #elseif os(iOS) || os(tvOS)
            return TRZFont(descriptor: newDescriptor, size: 0)
        #endif
    }
}