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alexbosworth/grayscale_uicolor.swift

Created September 8, 2015 04:01
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convert a ui color to grayscale
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grayscale_uicolor.swift
var (hue, saturation, brightness, alpha) = (CGFloat(0.0), CGFloat(0.0), CGFloat(0.0), CGFloat(0.0))
let originalColor = UIColor.redColor()
if originalColor.getHue(&hue, saturation: &saturation, brightness: &brightness, alpha: &alpha) {
let grayscale = UIColor(hue: hue, saturation: 0, brightness: brightness, alpha: alpha)
}
@phuna
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phuna commented Mar 25, 2016

Thank you for sharing

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