Comments on: Animations and transformations

By: Wally

Wally — Wed, 11 Jan 2012 19:37:09 +0000

Excellent tutorial thanks! Question (newbie!), I’m wanting to take a given image that is on the screen at a specific spot, and “grow” it by a specific size/scale to make it appear to enlarge. The image however may be located at one edge of the screen, and the desire would be to make it grow towards the middle of the screen, ultimately ending-up at a specific coordinate. So would it need to transform the scale as well as the translation to move the x/y coordinates at the same time as “growing” the scale? Is there a way to do this in the way I described by wanting the final placement to be at a specific x/y spot?

By: skram

skram — Thu, 05 Jan 2012 10:00:47 +0000

I use this macro instead, for Rotation:

#define degreesToRadians(x) (M_PI * x / 180.0)

Changing:
myImage.transform = CGAffineTransformMakeRotation(63.0*radianConst);

To This:
myImage.transform = CGAffineTransformMakeRotation(degreesToRadians(63));

Sam thing essentially. Just cleaner and quicker if using more than once.

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By: Tuyen Nguyen

Tuyen Nguyen — Thu, 10 Nov 2011 17:43:02 +0000

This should have been the first result in Google search with search terms “iphone objective c animation”.

Great tutorial,

Thank you very much.

By: Neelam

Neelam — Sat, 20 Aug 2011 11:20:39 +0000

Its really use ful for me thanks for share it

By: Adrian

Adrian — Tue, 09 Aug 2011 09:18:20 +0000

Great tutorial. I really needed that. Thank u!