The difference between frame and bounds in iOS development

Gossip does not say much, first two pictures, the guys have already understood:

The effect shown is such a drop:

Summary:

To clarify the difference between the two, the main point is to understand a few concepts: frame can be understood as a visual range, and bounds can be understood as the content location within the visual range. By default, the frame and bounds origin, that is, the x and Y axes are coincident. The frame and bounds in the parent view, the frame and the bounds in the child view, as I understand it, to determine the position of the child view two conditions, that is, the parent view of bounds and the frame in the child view , and the frame of the bounds and child views in the child view determines the size of the child view's position. That is, frame is the position and size of the coordinate system in the parent view, and bounds is relative to the position and size of the view coordinate system.

Note: Center is the location of the view's central point relative to the parent view.

The difference between frame and bounds in iOS development