Re: Programmatically pinch a UIView
Re: Programmatically pinch a UIView
- Subject: Re: Programmatically pinch a UIView
- From: Carl Hoefs <email@hidden>
- Date: Wed, 11 May 2016 13:56:27 -0700
> On May 11, 2016, at 1:51 PM, Carl Hoefs <email@hidden> wrote:
>
> On May 11, 2016, at 1:45 PM, Carl Hoefs <email@hidden> wrote:
>>
>>> On May 11, 2016, at 1:38 PM, David Duncan <email@hidden> wrote:
>>>
>>>> On May 11, 2016, at 1:32 PM, Carl Hoefs <email@hidden> wrote:
>>>>
>>>> In iOS 9.3, I have a UIView that displays a graph, and the view is pinchable. That works fine but I want to programmatically pinch the UIView so the default display initially shows the graph a bit smaller. How can I do this? Alternately, I've tried setting self.view.contentScaleFactor but this property seems to have no effect.
>>>
>>> contentScaleFactor determines the pixel : point relationship when using -drawRect: on a view. You want to set the transform for something like this (note that this will affect the view’s frame as well).
>>
>> Right, I was hoping there was a way to initially programmatically pinch the view down by 10%, so the view's frame isn't reduced as well. Then the user can pinch it to zoom in/out as desired.
>
> Would it help if I changed my UIView to be a UIScrollView instead? Then I could use -setZoomScale:.
I just tried UIScrollView & -setZoomScale:. No effect.
-Carl
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