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I've got a UIImageView (full frame and rectangular) that i'm rotating with a CGAffineTransform. The UIImage of the UIImageView fills the entire frame. When the image is rotated and drawn the edges appear noticeably jagged. Is there anything I can do to make it look better? It's clearly not being anti-aliased with the background.
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just add "Renders with edge antialiasing" with YES in plist and it will work.
I would totally recommend the following library.
http://vocaro.com/trevor/blog/2009/10/12/resize-a-uiimage-the-right-way/
It contains lots of useful extensions to UIImage that solve this problem and also include code for generating thumbnails etc.
Enjoy!