This question is more to figure out how to look up classes and objects in objective-c but i lack the knowledge to figure out how to look this up so i pose the question here.

In .Net if i had a MyObject.MyValue the MyValue would be called a property, and I could look this up in MSDN. In java i would check the javadocs online (and that property would have to be a value).

With objective-c that is called a ? and if i wanted to look it up i would look where?

Example:

//Object.???
UIImage.backgroundColor = [UIColor blueColor];