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Editorial Team
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Asked: 2026-05-26T15:02:09+00:00

I have the following test code: CGFloat endRed, endGreen, endBlue, endAlpha; [[UIColor greenColor] getRed:&endRed

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I have the following test code:

CGFloat endRed, endGreen, endBlue, endAlpha;

[[UIColor greenColor] getRed:&endRed green:&endGreen blue:&endBlue alpha:&endAlpha];

that I call inside drawRect method for an UIView class.
This code fails with exception 

2011-11-06 02:29:28.671 Chartous[13457:b303] -[UICachedDeviceRGBColor getRed:green:blue:alpha:]: unrecognized selector sent to instance 0x4e7ea10
2011-11-06 02:29:28.673 Chartous[13457:b303] *** Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: '-[UICachedDeviceRGBColor getRed:green:blue:alpha:]: unrecognized selector sent to instance 0x4e7ea10'

What is wrong here?

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1 Answer

  1. Editorial Team

    This method is available in ios5 and later only. Are you running it on an earlier iOS version on the simulator or device? I assume so given the tag on your question.

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