By: iamdavehi

iamdavehi — Wed, 02 Jul 2008 12:15:08 +0000

Do you know if this works on the Beta 8 SDK?
i keep getting an exception error.

*** Terminating app due to uncaught exception ‘NSUnknownKeyException’, reason: ‘[ setValue:forUndefinedKey:]: this class is not key value coding-compliant for the key window.”

any ideas?

thanks
-Dave

By: i42sasoi

i42sasoi — Thu, 26 Jun 2008 11:28:58 +0000

The problem is that the context is always null.Do you know any way to fix it?

By: i42sasoi

i42sasoi — Wed, 25 Jun 2008 16:32:55 +0000

Hi,

first thanks a lot for your work. I think you make easy.

Reading this second part, inspired me with a problem I have drawing images.
I receive some images from a socket, and I´ve tried to display on the screen,I tried with [self setNeedsDisplay] but It is not call when a frame is received, It just show the last frame received.
I tried to make a function like:

- (void) draw:(CGRect) rect {


   CGContextRef context = UIGraphicsGetCurrentContext();

   CGContextClearRect(context, rect);
   [self drawImage:context];

}

-(void) drawImage:(CGContextRef)ctx { CGContextDrawImage(ctx, CGRectMake(0.0, 0.0,320,480), imageFrame.CGImage); }

imageFrame is the image i´ve received throught the socket.
Then i call draw every time a frame is received, but I received the next error:

CGContextClearRect: invalid context
CGContextDrawImage: invalid context

Do you know what I mean?

Sorry If It is offtopic, but I dont know anybody to ask.
Sorry for my poor English too.
Thanks.

Comments on: Exploring iPhone Graphics Part 2

By: iamdavehi

By: i42sasoi

By: i42sasoi