Comments on: shouldAutorotateToInterfaceOrientation?

By: Matt

Matt — Thu, 25 Feb 2010 21:12:55 +0000

Hey. Thanks for the great code!

Total n00b question for you: how do I make the images selectable/save-able? I want to make a wallpaper gallery from some of my photos.

Thanks again!

By: omar

omar — Mon, 25 Jan 2010 10:20:29 +0000

hi,
is it possible put in loop the scrollview??? how to do this??

thanks

By: omar

omar — Sun, 24 Jan 2010 15:22:42 +0000

hi,
i m really interested to know how to select another imageview to start. for example in the middle. please let me know.

thanks

By: Simon

Simon — Fri, 18 Dec 2009 16:20:06 +0000

Thank you very much for making this code available – it’s really annoying that apple don’t make there picture viewer available, but this code works just as well!

I have found one small bug in it however. In some unusal circumstances, the pictures can end up in a funny position. This wasn’t easy to recreate on a regular basis, but after some time spent spinning my phone round, standing on my head etc ) I managed to recreate the problem consistently as follows:

1) Display a portrait picture (i.e a picture that fills the screen when the phone is held portrait).
2) Then follow the next few steps all in one movement.
3) Move the phone to a position so that the screen is pointing to the ceiling.
4) Turn the phone 360 degrees in a way that after turning it 180 degrees the phone screen is pointing at the floor.
5) Tilt the phone back to its starting position (portrait).

The result of these steps is that the image is roughly a third of the size (probably the size it is displayed in landscape mode) and positioned at the top right corner of the screen.

I have managed to fix the problem by changing the following line in the ImageGallery classes receivedRotate method:

if (interfaceOrientation != UIDeviceOrientationUnknown)
[self deviceInterfaceOrientationChanged:interfaceOrientation];

to:

if (interfaceOrientation != UIDeviceOrientationUnknown &&
interfaceOrientation != UIDeviceOrientationFaceUp &&
interfaceOrientation != UIDeviceOrientationFaceDown)
[self deviceInterfaceOrientationChanged:interfaceOrientation];

Hope this helps and thanks again for making the code available in the first place.

Simon

By: ben

ben — Wed, 09 Dec 2009 10:07:53 +0000

thank you so much! I spent ages trying to figure out how to rotate just one element, I started out like you, returning no for the shouldAutoRotate but using the orientation to do a transform. But then discovered that it wouldn’t fire when returning from landscape back to portrait… thank you for showing me the way to do it right.

By: Chris

Chris — Wed, 14 Oct 2009 22:45:16 +0000

Grazie mille

By: Imran

Imran — Wed, 14 Oct 2009 11:40:11 +0000

Björn Sållarp,
Thank you for posting this tutorial. I’m using this example for one of my application. I want to apply zooming. Can anyone help what to change in this code to allow zooming in Scrollview?
thanks

By: iPatx

iPatx — Mon, 17 Aug 2009 15:19:38 +0000

Thanks a lot for your how-to but I have a problem. If the iPhone is in UIInterfaceOrientationPortraitUpsideDown orientation when the gallery is started, after when I change iPhone orientation, pictures aren’t at the good size.
Do you know how to solve this?

Thanks

By: Brian Egge

Brian Egge — Tue, 11 Aug 2009 10:04:38 +0000

Thanks heaps for the example. It was a huge help for fixing a bug in my project.

By: Björn Sållarp

Björn Sållarp — Sat, 25 Jul 2009 09:27:43 +0000

@nicEPrice
If you’re moving back to the category selection from the ScrollView image gallery you should release the scroll view then. Use leaks to make sure you’re not having memory leaks in your app, that could cause the app to run slower. If you are not releasing the scroll view properly the slowdown could be because you get memory warnings and the leaked scroll view starts to release images/slides through the didReceiveMemoryWarning event.

Leaks is an awesome tool for finding leaks and investigating memory usage. Here’s a good tutorial on how to use it: http://www.streamingcolour.com/blog/tutorials/tracking-iphone-memory-leaks/