iOS Development Tutorial - View Transformation

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When I started working on my new course, Build Interactive Social Networking Apps, I set out to build really interactive and intuitive animation. This leads me to use tons of Core Graphics and Core Animation.

At first, view transformation (the CGAffineTransform stuff) really bothers me just because of the fancy name. As it turns out, it isn't that complicated. In this tut, I will show you briefly how to transform view with the "CGAffineTransform stuff"
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I need help/advice!!! I have an app for calling Bingo Balls... a bingo ball looks like a ping pong ball and could be one of 5 different colors. It also has a small white circle on one side of the ball with a letter and a number in it. Currently, I have created a custom control which uses one of 5 static 2d images (one for each color) and then I add 2 labels - 1 for the letter and 1 for the number. It doesn’t look too bad, but I really want to make these balls 3D and I have no clue on how to even get stared or what libraries I need to learn how to use. I do know that I don’t want to ship my app with 75 assets (1 for each ball). Is there a way I can generate them through code? Perhaps with CoreGraphics? Basically I would think that I just need to learn how to draw a sphere, apply a skin to it, and then incorporate it into a UIView so I can use it wherever I need it (collectionView mostly but not exclusively)... can somebody please point me in the right direction ???

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