Core Animation: Simplified Animation Techniques for Mac® and iPhone® Development

Chapter 5. Layer Transforms

In This Chapter

• Scale Transform

• Using -rotateTransform:

• Using -rotate3DTransform:

• Anchor Points

• Combining Transforms

• Scale Versus Bounds

Up to this point, we have discussed how to move elements around the screen, change their color, and various other interesting effects. In this chapter, we take that quite a bit further. Transforms is a catchall to describe applying a matrix transform to a layer for some startling results.

What is a transform? A transform is a term used to include any function that alters the size, position, or rotation of an object, in our case a layer. Transforms scale a layer up or down and rotate a layer along one or more planes. Transforms are applied using a matrix function that ...