I've checked, and the same behavior occurs in the Maps application.
On Dec 25, 2010, at 11:14:52, Rick Mann wrote:
>
> On Dec 25, 2010, at 06:29:49, John Joyce wrote:
>
>>
>> On Dec 25, 2010, at 5:41 AM, Rick Mann wrote:
>>
>>> Hi. I have a simple view-based iPad app that contains a MapKit view. If you
>>> start the app in portrait orientation, and then rotate to landscape,
>>> everything rotates correctly, but there's a strip along the right edge that
>>> remains blank. If you then try to pan or zoom the map, it snaps to fill
>>> this area.
>>>
>>> I did some googling but couldn't find anyone describing this behavior, and
>>> I'm not sure what I need to do to correct it. Any suggestions?
>>>
>>> TIA,
>>> Rick
>>>
>>> _______________________________________________
>> Does it happen in the Simulator and on a device?
>> (hopefully both)
>
> Yep, both sim & device, both iPad and iPhone. Interestingly, on the iPhone,
> it defaults to a state that's zoomed in enough that when you rotate, the
> blank strip doesn't occur. But if you first zoom out all the way on iPhone,
> and then rotate, it happens.
>
> That prompted me to try a few other things. On sim & both devices, if you
> change to portrait orientation and pan the map fully to the left (so the map
> content is all the way to the left), and rotate to landscape, you get a band
> on the right edge. If, in landscape, you pan the map, it will always snap to
> fill, and then you can't get the blank strip back, unless you then rotate
> back to portrait, pan the map to the left, and re-rotate to landscape.
>
>> So you should consider some simple NSLog calls around those events (delegate
>> methods might help) and log the view and super view dimensions.
>
> Logging the view and the map view's frames in willRotate/didRotate, I get
> numbers that always seem wrong to me (this is portrait-to-landscape):
>
> Will rotate, view frame: {{0, 20}, {768, 1004}}
> Will rotate, map frame: {{0, 0}, {768, 1004}}
> Did rotate, view frame: {{0, 0}, {748, 1024}}
> Did rotate, map frame: {{0, 0}, {1024, 748}}
>
> After rotation, the view's frame still has portrait dimensions. I guess
> there's a rotation transform on it, but then you can see the map's frame does
> have the right aspect ratio. Now, in the past, I've always distrusted the
> frames reported this way, because they've never seemed right.
>
> The subsequent landscape-to-portrait:
>
> Will rotate, view frame: {{0, 0}, {748, 1024}}
> Will rotate, map frame: {{0, 0}, {1024, 748}}
> Did rotate, view frame: {{0, 20}, {768, 1004}}
> Did rotate, map frame: {{0, 0}, {768, 1004}}
>
>> You say the right edge... but does that mean if you rotate either left or
>> right into landscape orientation, you see it on the right edge?
>
> Yep, always blank on the right edge, never the left.
>
> Also note, if you launch in landscape mode, it also occurs.
>
> Thanks,
> Rick
>
>
>
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