Customized Rotation for UIImageView objects

[MGunetileke]

Hi everyone,

I'm looking for a way to smoothly rotate an image object on screen.
(Note: NOT to straight away rotate by 90 degrees, but to give the option to fully rotate 360 degrees and be able to stop anywhere)

To get a better idea of what I'm saying, check out this app; YouTube - Funny Face - review iPhone Application - Customize Your Photo in a way you like. What I'm trying to do is basically the same thing as this app, but for tshirt designing, i.e. to take various small patterns, place them on a tshirt template while having the option to resize+rotate them.

I'm open to hear of anyway this can be done... looked around, but havent found any sample code relating to this..

Thanks!

[Oliver Drobnik]

Originally Posted by MGunetileke

Hi everyone,

I'm looking for a way to smoothly rotate an image object on screen.
(Note: NOT to straight away rotate by 90 degrees, but to give the option to fully rotate 360 degrees and be able to stop anywhere)

To get a better idea of what I'm saying, check out this app; YouTube - Funny Face - review iPhone Application - Customize Your Photo in a way you like. What I'm trying to do is basically the same thing as this app, but for tshirt designing, i.e. to take various small patterns, place them on a tshirt template while having the option to resize+rotate them.

I'm open to hear of anyway this can be done... looked around, but havent found any sample code relating to this..

Thanks!

You can rotate and scale how an image is displayed by applying an affine transform to it. This does not change the image itself, but how it is shown.

[MGunetileke]

Thanks a lot Oliver!... that does indeed solve my problem to a certain degree.

But with the Affine Transform applied, I found that you cannot zoom in out of the rotated image (it results in some very weird transformations). I presume it is because as you said the Affine Transform changes how the image is displayed and not the image itself.

So, 2 questions here if I may;

1 - Is there any way to make the change by Affine transform permanent?
(change the image itself, not just how it is shown)

2 - Any other way to make such rotations?


Thanks again!!