How do I convert RGB into HSV in Cocoa Touch?

You can use the following convenience constructor of the UIColor object: (UIColor *)colorWithHue:(CGFloat)hue saturation:(CGFloat)saturation brightness:(CGFloat)brightness alpha:(CGFloat)alpha.

You can use the following convenience constructor of the UIColor object: + (UIColor *)colorWithHue:(CGFloat)hue saturation:(CGFloat)saturation brightness:(CGFloat)brightness alpha:(CGFloat)alpha.

1 RGB -> HSV requires some custom code, but HSV -> RGB is pretty easy. You're in luck! – Ben Gotow Jun 26 '09 at 23:31 Thanks!

It didn't know it would be so easy. That specific code actually gave me some syntax errors. It worked out better as: UIColor colorWithHue:(CGFloat) saturation:(CGFloat) brightness:(CGFloat) alpha:(CGFloat) – Evelyn Jun 29 '09 at 12:24 2 Evelyn: That's because what arul gave you is the method's prototype, not a message expression.It's not supposed to be pasted into a method body.

– Peter Hosey Apr 5 '10 at 8:21.

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