iPhone Development - What's the Difference between the Origin and the bounds?

Question

iPhone开发 - Origin和bounds有什么区别？

Answer 1

The origin is where view starts so 0,0 for example would mean that the view is in the top left corner of the screen.

The bounds is the size and orgin of the screen together. So if the size is 10, 10 and the origin is 0, 0 then a view is located in the top left of the screen and is 10 pixels x 10 pixels.

Edit 1: More detail

Bounds is a CGRect ( Documentation )

Answer 2

First of all, the bounds and the frame of a view are very similar things, but not the same. The frame describes the origin (location/position) and size of the view in it's parent view's coordinate system. The bounds describes them in the view's coordinate system. That's why usually the origin of the bounds is (0, 0) and the size's are the same.

So to answer your question, the origin (a CGPoint ) and the size (a CGSize ) of a view in it's own coordinate system make up it's bounds (a CGRect ).