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Re: [iPhone] custom CALayer drawing
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Re: [iPhone] custom CALayer drawing


  • Subject: Re: [iPhone] custom CALayer drawing
  • From: PCWiz <email@hidden>
  • Date: Thu, 11 Feb 2010 17:47:33 -0700

Tried it, my code looks like this now:

CustomLayer *lines = [CustomLayer layer];
[self.view.layer addSublayer:lines];
[lines setNeedsDisplay];

Still nothing. Am I calling setNeedsDisplay at the wrong place?

On 2010-02-11, at 5:39 PM, Bob Barnes wrote:

>   Have you tried calling setNeedsDisplay on the view? You need to request that a view redraw when the data or state used for drawing a view changes.
>
> Bob
>
> On Feb 11, 2010, at 3:44 PM, PCWiz wrote:
>
>> I'm trying to do some custom drawing in a CALayer subclass by overriding the drawInContext: method, but it appears that its not being called. In my subclass I just have this:
>>
>> - (void)drawInContext:(CGContextRef)theContext
>> {
>>    NSLog(@"drawInContext called");
>> }
>>
>> Then in the viewDidLoad method of my view controller I have this:
>>
>> CustomLayer *lines = [CustomLayer layer];
>> [self.view.layer addSublayer:lines];
>>
>> However, the drawInContext method is never called. What am I doing wrong here?_______________________________________________
>>
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References: 
 >[iPhone] custom CALayer drawing (From: PCWiz <email@hidden>)
 >Re: [iPhone] custom CALayer drawing (From: Bob Barnes <email@hidden>)

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