Re: CGContextConcatCTM: invalid context 0x0. How to fix?
Re: CGContextConcatCTM: invalid context 0x0. How to fix?
- Subject: Re: CGContextConcatCTM: invalid context 0x0. How to fix?
- From: Lennart Thelander <email@hidden>
- Date: Thu, 19 Sep 2013 07:26:35 +0000
- Thread-topic: CGContextConcatCTM: invalid context 0x0. How to fix?
Hi,
This is more a Cocoa question than an Xcode question, but here goes:
The value of the first parameter to these functions are NULL. In the documentation, this parameter is called "CGContextRef c".
So make sure "c" is not NULL (and has a valid value).
Regards
Lennart Thelander
19 sep 2013 kl. 09.18 skrev Gerriet M. Denkmann:
> Using the new Xcode 5.0 with some iOS app, I get told:
>
> CGContextConcatCTM: invalid context 0x0. This is a serious error. This application, or a library it uses, is using an invalid context and is thereby contributing to an overall degradation of system stability and reliability. This notice is a courtesy: please fix this problem. It will become a fatal error in an upcoming update.
>
> Same with CGBitmapContextCreateImage: invalid context 0x0.
>
> But Xcode also tells me: No Results for "CGBitmapContextCreateImage" (nor for CGContextConcatCTM). The only CG... it finds is CGRect, CGFloat, CGSizeMake, etc.
>
> So: where do I have to look to get rid of this "serious error"?
>
> Gerriet.
>
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