are you using the right kind of view as described in the doc?
On Jun 2, 2010, at 12:00 AM, Development wrote:
> That's pretty much where I started with this code. However it's still fuzzy.
> I can scale the view itself and it's perfectly clear but the origin is all
> messed up and it's offset halfway out of it's parent view. thats what I tried
> here:CGContextScaleCTM(context, scle,scle);
>
> I've attempted to scale the bounds of the view itself, redraw the content and
> then adjust the size of the scrollview's content but that ends up being the
> same mess as before. I was hoping I could get a little more information on
> rendering an image.
>
> On Jun 1, 2010, at 8:38 PM, Scott Anguish wrote:
>
>> The last portion of chapter the Basic Scrolling Using the Pinch Gestures in
>> ScrollView Programming Guide for iPhone is called
>>
>> Ensuring that Zoomed Content is Sharp when Zoomed
>>
>> It has an example (engineering approved) way of handling this. It isn’t the
>> greatest solution available, but it is the currently recommended method.
>>
>>
>>
>> On Jun 1, 2010, at 11:03 PM, Development wrote:
>>
>>> Ok, well I've worked out most of the other issues I've run in to. However
>>> the one I am now unable to really figure out has to do with zooming scroll
>>> view contents and winding up with a clear image. The problem is that I'm
>>> not getting a clear image.
>>> Is it possible to use the built in zooming methods to zoom an image and
>>> keep it clear or do I have to basically implement my own zooming methods. I
>>> read the zooming docs and unfortunately they did not help me to understand
>>> what to do.
>>>
>>> This is the drawing code from the view that is being zoomed.
>>>
>>> -(void)drawLayer:(CALayer*)layer inContext:(CGContextRef)context
>>> {
>>>
>>> CGRect newRect = self.bounds;
>>> float scle =CGContextGetCTM(context).a;
>>>
>>> CGRect rect =CGContextGetClipBoundingBox(context);
>>>
>>> CGContextSaveGState(context);
>>> CGContextSetRGBFillColor(context, 1.0,1.0,1.0,1.0);
>>> CGContextFillRect(context,self.bounds);
>>> CGContextTranslateCTM(context, 0.0, newRect.size.height);
>>> CGContextScaleCTM(context, 1.0, -1.0);
>>> CGContextScaleCTM(context, scle,scle);
>>>
>>> CGAffineTransform pdfTransform = CGPDFPageGetDrawingTransform(myPage,
>>> kCGPDFCropBox, newRect, 0, true);
>>> CGContextConcatCTM(context, pdfTransform);
>>> CGContextDrawPDFPage(context, myPage);
>>>
>>> CGContextRestoreGState(context);
>>> }
>>>
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>
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