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: David Duncan <email@hidden>
- Date: Thu, 19 Sep 2013 10:32:14 -0700
On Sep 19, 2013, at 7:58 AM, Dean Reyburn <email@hidden> wrote:
> I ran into this yesterday converting CoreFoundation to ObjC with XCode 5. The old CF call to CGContextDrawImage(context, rect, picname) did not throw anything into the console.
Yes, all of UIKit’s drawing methods are implemented via Core Graphics calls (this is true of AppKit as well).
On Sep 19, 2013, at 3:31 AM, Gerriet M. Denkmann <email@hidden> wrote:
>> 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).
>
> The problem: Xcode tells me I am nowhere using any of these functions. So what to do next?
You file a bug.
--
David Duncan
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