Invalid context when creating UIImageView

Question

I have an error when I tried to create a UIImageView. Look at this code :

UIImage* backgroundPanel = [[UIImage imageNamed:@"loginPanelBackground.png"] resizableImageWithCapInsets:UIEdgeInsetsMake(90, 0, 149, 416)];

self.connexionBackgroundImgView = [[UIImageView alloc] initWithImage:backgroundPanel];
self.connexionBackgroundImgView.frame = CGRectMake(0, 0, 416, 390); // THIS LINE PROVOC THE INVALID CONTEXT
[self.connexionView insertSubview:self.connexionBackgroundImgView aboveSubview:self.connexionToCreationCompteView];

It throws this error in the log :

<Error>: CGContextSaveGState: invalid context 0x0
<Error>: CGContextSetBlendMode: invalid context 0x0
<Error>: CGContextSetAlpha: invalid context 0x0
<Error>: CGContextTranslateCTM: invalid context 0x0
<Error>: CGContextScaleCTM: invalid context 0x0
<Error>: CGContextGetCTM: invalid context 0x0
<Error>: CGContextSaveGState: invalid context 0x0
<Error>: CGContextClipToRect: invalid context 0x0
<Error>: CGContextDrawTiledImage: invalid context 0x0
<Error>: CGContextRestoreGState: invalid context 0x0
<Error>: CGContextGetCTM: invalid context 0x0
<Error>: CGContextSaveGState: invalid context 0x0
<Error>: CGContextClipToRect: invalid context 0x0
<Error>: CGContextDrawTiledImage: invalid context 0x0
<Error>: CGContextRestoreGState: invalid context 0x0
<Error>: CGContextGetCTM: invalid context 0x0
<Error>: CGContextSaveGState: invalid context 0x0
<Error>: CGContextClipToRect: invalid context 0x0
<Error>: CGContextDrawTiledImage: invalid context 0x0
<Error>: CGContextRestoreGState: invalid context 0x0
<Error>: CGContextRestoreGState: invalid context 0x0

I had this error only on the iPad, not with the Simulator, I don't understand.. :/

Are you using any custom drawing code? like by using CGContext and all? — iDev, Nov 01 '12 at 19:31
Also try changing self.connexionBackgroundImgView = [[UIImageView alloc] initWithFrame:CGRectMake(0, 0, 416, 390)]; [self.connexionBackgroundImgView setImage:backgroundPanel]; Actually it shouldnt make much difference. But still you can try. — iDev, Nov 01 '12 at 19:33
Are you using any custom drawing? implementing CGContext somewhere? — iDev, Nov 01 '12 at 21:50
See the answer here: http://stackoverflow.com/questions/10695258/how-do-i-capture-uiimage-of-complete-contents-of-uitableview-uiscrollview-and — eliajf, Nov 02 '12 at 22:17
Thanks eliajf, can you post your comment as an answer. Then, I'll accept it as the right one ! — seb, Nov 03 '12 at 12:21

score 40 · Answer 1 · answered Nov 26 '12 at 14:51

40

I had this problem until I found out that my cap inset argument to resizableImageWithCapInsets: was wrong — it didn't leave any un-capped area at all (you need at least 1x1 pixel not covered by a cap). So make sure that:

(insets.left + insets.right) < width

and

(insets.top + insets.bottom) < height

answered Nov 26 '12 at 14:51

neon1

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This is exactly my case! I'm using resizableImageWithCapInsets and frame is smaller than cap insets, so it throws this warning... – JakubKnejzlik Dec 13 '12 at 15:36
Great tip, I searched for a long time before finding this :-) – Martin Jan 03 '13 at 17:46

score 0 · Answer 2 · answered Nov 01 '12 at 19:16

0

The Simulator is case-insensitive. The device is case-sensitive. The png is named correctly? Maybe it is 'Login' with a capital L.

answered Nov 01 '12 at 19:16

Masa

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The image is displayed correctly both on Simulator and iPad. The log changes nothing but I want to know why I have this error :/ – seb Nov 01 '12 at 19:20

score 0 · Accepted Answer · edited May 23 '17 at 11:45

0

See the answer here : How do I capture UIImage of complete contents of UITableView / UIScrollView and make it work on an ios device

Thanks eliajf !

edited May 23 '17 at 11:45

Community

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answered Nov 03 '12 at 15:28

seb

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score 0 · Answer 4 · answered Jun 02 '15 at 08:40

0

I still can't comment due to low rep. However I'd like to add to neon1's answer which helped me a lot.

You also need to make sure that all of the insets are greater than zero.

insets.left > 0

insets.top > 0

insets.right > 0

insets.bottom > 0

answered Jun 02 '15 at 08:40

Almighty

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Invalid context when creating UIImageView

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