Drawing shadow with Quartz is slow on iPhone & iPad. Another way?

Question

I was pretty excited when I found out just how easy it is to add shadows to my UIViews on the iPhone/iPad.

Just add the framework in Xcode, add the import to the top

Answer 1

You should set the shadowPath property. It is how CoreGraphics is able to optimize shadows.

For example, if your view is an opaque rectangle:

self.contentView.layer.shadowPath = [UIBezierPath bezierPathWithRect:self.contentView.bounds].CGPath;