What is the difference between a frame and a bounds in iOS?

In iOS development, understanding the difference between a view’s frame and its bounds is essential for correctly positioning and sizing views within their superviews. Here’s the difference between a frame and a bounds in iOS:

• Frame:
  • The frame of a view represents its position and size relative to its superview’s coordinate system.
  • The frame is defined by the view’s frame property, which is a CGRect structure containing the view’s origin (x, y) and size (width, height) in points.
  • Changes to a view’s frame affect its position and size within its superview. For example, setting a view’s frame.origin moves the view to the specified coordinates within its superview.
• Bounds:
  • The bounds of a view represents its internal coordinate system, relative to its own position and size.
  • The bounds is defined by the view’s bounds property, which is a CGRect structure containing the view’s origin (usually {0, 0}) and size (width, height) in points.
  • Changes to a view’s bounds do not affect its position within its superview but may affect the layout and drawing of its subviews. For example, adjusting the bounds.origin will change the coordinate system of the view’s subviews without changing their position relative to the superview.

The frame of a view defines its position and size within its superview’s coordinate system, while the bounds defines its internal coordinate system relative to its own position and size. Understanding and correctly using the frame and bounds properties is crucial for laying out views and handling coordinate transformations in iOS app development.