Why is there an frame rectangle and an bounds rectangle in an UIView?

Question

Well although it\'s late in the dark night, I don\'t get it why there are two different rectangles: frame and bounds.

Like I understand it, one single rectangle wou

Answer 1

Here's the cheatsheet:

• frame is where the view is (with respect to the superview)
• bounds is where the view is allowed to draw (with respect to itself)

Some more clarification:

If you are positioning the view in its superview, you almost always change the frame origin.

If you are clipping where the UIView is drawing, you almost always modify its bounds.

Note that you are allowed to have bounds that is bigger than the frame. That is, you can draw "outside the lines" of where you are.