Seen this asked before but my example does not seem to work.
const CGFloat *toCol = CGColorGetComponents([[UIColor greenColor] CGColor]);
The array is empty from looking at it with GDB. Any hints?
Extracting rgb from UIColor
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6 Answers
The code sample you provided should work.
Try this:
UIColor uicolor = [[UIColor greenColor] retain];
CGColorRef color = [uicolor CGColor];
int numComponents = CGColorGetNumberOfComponents(color);
if (numComponents == 4)
{
const CGFloat *components = CGColorGetComponents(color);
CGFloat red = components[0];
CGFloat green = components[1];
CGFloat blue = components[2];
CGFloat alpha = components[3];
}
[uicolor release];
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