Warning: "No '-renderInContext' method found"

Question

I have this code, and it is working exactly as desired:

UIGraphicsBeginImageContext(self.bounds.size);
[self.layer renderInContext:UIGraphicsGetCurrentContext()];
UIImage* image = UIGraphicsGetImageFromCurrentImageContext();
UIGraphicsEndImageContext();

However, for this line:

[self.layer renderInContext:UIGraphicsGetCurrentContext()];

I am getting the warning (not error):

No '-renderInContext' method found.

How can I have this warning, if in fact the method is working? If I were to simply comment out this line, my code fails; so clearly the line, and thus the method, are in fact working.

score 7 · Accepted Answer · edited Jun 23 '11 at 13:08

7

You need to add reference to the header file for CALayer - #import <QuartzCore/QuartzCore.h>. You might also need to add the QuartzCore.framework to your project.

edited Jun 23 '11 at 13:08

Deepak Danduprolu

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answered Jun 23 '11 at 12:57

Jiri

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score 3 · Answer 2 · answered Jun 23 '11 at 12:58

It's saying this because the compiler can't find the definition of that method. You need to add this line:

#import <QuartzCore/QuartzCore.h>

to the start of the .m file. You may also need to add the QuartzCore framework to your project.

(the reason your app works is that the method is available at run time)

score 0 · Answer 3 · edited May 23 '17 at 12:06

0

You are probably having the same issue as this guy. Make sure you add QuartzCore.

edited May 23 '17 at 12:06

Community

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answered Jun 23 '11 at 12:57

Joe

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Warning: "No '-renderInContext' method found"

3 Answers3