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Re: Injecting text into a CALayer?
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Re: Injecting text into a CALayer?


  • Subject: Re: Injecting text into a CALayer?
  • From: David Duncan <email@hidden>
  • Date: Fri, 15 Apr 2011 11:42:49 -0700

On Apr 15, 2011, at 11:11 AM, Jon Sigman wrote:

> In iOS 4.3, I have an app that uses CALayers to draw small circles on the screen
> like so:
>
>  CALayer *_layer = [[CALayer alloc] init];
>  [_layer setDelegate:self];
>  [_layer setBounds:CGRectMake( 0,0,100,100 )];
>  [_layer setNeedsDisplay];
>
> Is there a way I can draw text into the circle regions? I'd like to label them.

What is 'self' in the code above? Having the delegate draw the text would be the simplest thing you can do. Next simplest would be to add a CATextLayer sublayer. At a higher level however, you could do the exact same thing with UIViews and use UILabel for your labels (which since they do less work for text layout are generally faster).

--
David Duncan

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