NSKeyedArchiver/NSuserDefaults - saving a CGRect

Question

My app involves a user being able to drag specific items such as volume sliders and UIImage views. My goal is to be able to save the locations of the items so that the user can not have to drag the items again after re-launch. Unfortunately, I have seen errors along taking the 'saving CGRect rect = item.frame to NSuserDefaultsorNSKeyedArchiver' route. Any other suggestions?

Answer 1

You could use NSStringFromgCGRect() and CGRectFromString() to store them.

Answer 2

If you're using keyed archiving on iPhone, UIKit specifically supports an addition that looks like this: -encodeCGRect:forKey: and does precisely what you want. See the Apple docs for NSCoder's UIKit additions.

If you're using NSUserDefaults, you don't get the luxury of using an explicit encoder for CGRects, but as some other answers say, you could save them as strings using NSStringFromCGRect() and its reverse.