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Editorial Team
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Asked: 2026-05-15T22:45:32+00:00

I’m trying to set a property like so – -interface: @property (readwrite, assign) CGColorRef

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I’m trying to set a property like so –

-interface:

@property (readwrite, assign) CGColorRef otherBallColor;

-someMethod:

CGColorRef ballColor = [UIColor colorWithRed:255.0/256.0 green:165.0/256.0 blue:239.0/256.0 alpha:1.0].CGColor;  
[self setOtherBallColor:ballColor];

As soon as I try to access the value it crashes –

-someOtherMethod (drawRect in this case):

CGContextSetFillColorWithColor(context, otherBallColor);

But if in the “someMethod” I do –

CGColorRef ballColor = [UIColor blueColor].CGColor;

… it all works fine. Can anyone explain what’s going on?

Many thanks (PS, quite new to Objective-C, tho not programming in general)

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1 Answer

  1. Editorial Team

    You must retain returned CGColor, your [UIColor colorWith…] creates an auto-released instance, so, when it is out of scope (autoreleased I mean), corresponding CGColor is released as well.

    I’d recommend you to use UIColor instead of CGColorRef if i is possible in this case.

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