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Change ActualZoom of PDF Viewer, or force it to load zoomed in? (changing zoom crashes on iOS)

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Posted on by RGartman

I'm using the PDF Viewer in a app to be used on iPad.

As someone else found in 2017, changing the zoom of the PDF Viewer on iOS tends to crash the app and force it to restart. This happens whether using the built-in controls or making custom zoom controls.

As a workaround, I'd like to have the pdf be zoomed in by default, however even when changing the Zoom attribute, the PDF Viewer always loads to fit the width of the area.

Is there any way to force the PDF Viewer to start zoomed in, perhaps by modifying the ActualZoom attribute?

I don't see anywhere that ActualZoom can be modified.

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Building Power Apps

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v-monli-msft on at

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Hi @RGartman ,

It seems that I have reproduced your issue. I will try to discuss this issue with others and see if they have further suggestions. Sorry for the inconvenience.

Regards,

Mona

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denglish 128 on at

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@v-monli-msft-- Any update on this? In my app, the PdfViewer is still loading up set to Zoom.FitWidth, regardless of what the Zoom attribute is set to. Setting the Zoom attribute that changes OnVisible also does not work.

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MC-09121519-0 on at

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@v-monli-msft , same issue/requirement here. Any update?

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Nico_0710 171 on at

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Hey,
has anyone solved the problem ?

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MC-09121519-0 on at

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Hi, If I remember well, I needed to start a timer object when the apps is starting that sets a variable for the zoom level. The PDF viewer Zoom property is set to this variable. The idea is you need a duration of the timer object that is long enough for the PDF viewer to load the PDF and then set the zoom attribute. If the PDF is not loaded and you set the zoom, it will not work.

Also, if you want to have zoom level default by user, you can use LoadData/SaveData to save and retreive user zoom level preference.

Hope this help.

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Nico_0710 171 on at

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Hey,
Here is a brief explanation of what I need. I have two screens in my app. On the first one, a PDF file is selected which is to be displayed on screen two. It is then displayed on screen 2. I have already tried your approach and set the AutoStart property of the timer to Set(varZoom, Zoom.FitBoth). I have set the zoom property of the PDF to varZoom. However, it does not work. Have I done something wrong or is there another approach that should work?

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krodgers 45 on at

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If know this thread is old but the problem is still there. I did find a work around so the way I have this working is having the Zoom look at a variable. Everytime I select a file in a gallery to view the PDF I first set the variable for Zoom to Zoom.FitWidth and then there is about a 1 second delay and then I set the variable for Zoom to Zoom.FitHeight and it fixes the Zoom for the PDF. I attached a screenshot of the Onselect code for the gallery.

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