I'm Flash/AS3 developer and I'm wondering how some iPhone developers use vector assets in their games.
For example, "Lil' Pirates": this games looks like vector-based, it's zooming and unzooming easily, but I can't get any information about using vector assets at iOS.
Quartz 2D is a pretty lightweight framework for vector based graphics. It's very well documented...
In particular I'd pay particular notice to layering and performance...
Quartz Layering and Performance
If performance is a worry I'd also have a read through the core animation documentation. Core animation uses CALayers to cache vectors drawn with Quartz to in-memory bitmaps. These CALayers can then be transformed and translated through the animation APIs. If you intend to perform a lot of drawing this is the route I would recommend.
来源：https://stackoverflow.com/questions/5283103/using-vector-graphics-in-iphone-games