Re: Moving a UIView when has a CAAffineTransformationRotate
Re: Moving a UIView when has a CAAffineTransformationRotate
- Subject: Re: Moving a UIView when has a CAAffineTransformationRotate
- From: Gustavo Pizano <email@hidden>
- Date: Tue, 30 Nov 2010 19:30:54 +0100
Sorry keeping mail in the list,
On Nov 30, 2010, at 7:29 PM, Gustavo Pizano wrote:
> Hello David, thanks for the reply.
>
> I have replace the code for this:
>
> UITouch *aTouch = [touches anyObject];
> CGPoint loc = [aTouch locationInView:self];
> CGPoint prevloc = [aTouch previousLocationInView:self];
> CGPoint center = self.center;
> float deltaX = loc.x - prevloc.x;
> float deltaY = loc.y - prevloc.y;
> center.x += deltaX;
> center.y += deltaY;
> [self setCenter:center];
>
> it works ok for anything but views with a transformation, rotate in this case) applied, im still having the same behavior as before, what am I doing wrong?.
>
> Thanks
>
> Gustavo
>
> On Nov 30, 2010, at 7:11 PM, David Duncan wrote:
>
>> On Nov 30, 2010, at 9:49 AM, Gustavo Pizano wrote:
>>
>>> Any help or tip may be appreciate, my linear algebra is not that good ... :SS I wanna cry...
>>
>>
>> Move the center instead of the frame. The frame is derived from the center, bounds.size and transform, so once you've placed a transform on the view the frame is a much less reliable means of making adjustments to the view.
>> --
>> David Duncan
>>
>
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