Bug 33434 - UIScrollView ZoomToRect is animating the scroll/zoom even though i'm sending false for animation bool
Summary: UIScrollView ZoomToRect is animating the scroll/zoom even though i'm sending ...
Status: RESOLVED ANSWERED
Alias: None
Product: iOS
Classification: Xamarin
Component: General ()
Version: unspecified
Hardware: Macintosh Mac OS
: --- normal
Target Milestone: Untriaged
Assignee: Bugzilla
URL:
Depends on:
Blocks:
 
Reported: 2015-08-27 14:59 UTC by Joey Z
Modified: 2015-09-02 12:35 UTC (History)
2 users (show)

Tags:
Is this bug a regression?: ---
Last known good build:

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RESOLVED ANSWERED

Description Joey Z 2015-08-27 14:59:42 UTC
XCode 6.4
Xamarin version 5.98

I'm trying to call ZoomToRect on a UIScrollView and I want it to NOT animate so I can wrap a UIView.Animate around it to set a custom duration. But the problem is when I call this.ScrollView.ZoomToRect with false in the animation booleon it's still animating the zoom/scroll! Is this a bug or am I doing something wrong?

InvokeOnMainThread (delegate {
    this.ScrollView.ZoomToRect (new CGRect (100,100, 500, 500), false);  
});


http://stackoverflow.com/questions/32255586/uiscrollview-zoomtorect-is-animating-the-scroll-zoom-even-though-im-sending-fal
Comment 1 Rolf Bjarne Kvinge [MSFT] 2015-09-01 07:20:36 UTC
This doesn't sound like a problem in Xamarin.iOS (since we're just a thin wrapper around the iOS API), but can you create a test project we can use to check this ourselves?
Comment 2 Joey Z 2015-09-02 12:29:00 UTC
test
Comment 3 Joey Z 2015-09-02 12:31:15 UTC
It appears my last comment didn't save.  I'll try again. Here's a sample project demoing the issue

https://www.dropbox.com/s/q5p176jsnht9fzk/Test_ZoomToRect.zip?dl=0

I've solved the issue.  It was user error.  It appears that the boolean to set animation doesn't function correctly if your CGRect you pass in isn't within the min/max zoom scale of the UIScrollView.  I assumed it would because SetContentOffset tends to allow you to scroll passed the bounds of the contentsize so I didn't think it would be an issue with zooming, but apparently it is.  Anything outside the min/max zoomscale bounds breaks the animation.
Comment 4 Rolf Bjarne Kvinge [MSFT] 2015-09-02 12:35:55 UTC
OK, I'm closing this then.