Re: How can I be so wrong about graphics?
Re: How can I be so wrong about graphics?
- Subject: Re: How can I be so wrong about graphics?
- From: Evadne Wu <email@hidden>
- Date: Tue, 07 Jun 2011 08:07:43 +0800
Something along the line of [self convertPoint:aPoint fromView:nil] should do the trick, if you’re very sure that the points were global. Hope it helps.
-ev
On Jun 7, 2011, at 05:51, Development wrote:
> Hmm... it looks like it does draw the line... way off in the ether somewhere...
> I think I drew in the global coord system not the local to the view
>
> On Jun 6, 2011, at 2:37 PM, David Duncan wrote:
>
>> On Jun 6, 2011, at 2:31 PM, Development wrote:
>>
>>> I'm really loosing faith in my ability to read simple english
>>>
>>>
>>> According to like a million examples... If I place the follow bit of code in a view's drawRect: method I should get a line from pointA to pointB however I get nothing.
>>> How can subclassing UIView be this difficult? I have turned off clips to bounds, set the stroke color to black and done basically everything I know to do but I get an empty path
>>>
>>>
>>> CGContextRef context = UIGraphicsGetCurrentContext();
>>>
>>> CGContextSetStrokeColorWithColor(context, self.strokeColor.CGColor);
>>> CGContextBeginPath(context);//According to most examples this is a waste of code
>>>
>>> // Draw them with a 2.0 stroke width so they are a bit more visible.
>>> CGContextSetLineWidth(context, 2.0);
>>>
>>> CGContextMoveToPoint(context, pointA.x,pointA.y); //start at this point
>>>
>>> CGContextAddLineToPoint(context,pointB.x, pointB.y); //draw to this point
>>>
>>> // and now draw the Path!
>>> CGContextStrokePath(context);
>>
>>
>> What is pointA & pointB? What is self.strokeColor? Assuming this is happening within -drawRect:, it should work just fine.
>> --
>> David Duncan
>>
>
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