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CGContextSetFillColorWithColor: invalid context 0x0
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CGContextSetFillColorWithColor: invalid context 0x0


  • Subject: CGContextSetFillColorWithColor: invalid context 0x0
  • From: Viacheslav Karamov <email@hidden>
  • Date: Wed, 30 Oct 2013 12:07:41 +0200

I have two texitfields on login form. When I rotate the device, I got a lot of error message in a debugger console:

<Error>: CGContextSetFillColorWithColor: 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.

<Error>: CGContextSaveGState: 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.
....

After some googling I have implemented drawLayer:inContext: my UITextField subclass:

- (void) drawLayer:(CALayer *)layer inContext:(CGContextRef)ctx
{
    UIGraphicsPushContext(ctx);
    [super drawLayer:layer inContext:ctx];
    UIGraphicsPopContext();
}

but this didin't help at all.

Thank you for help in advance,
Vyacheslav.
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