What is Frame in iOS?

The frame rectangle, which describes the view’s location and size in its superview’s coordinate system. iOS 2.0+

What is frame Swift?

Short description. frame = a view’s location and size using the parent view’s coordinate system ( important for placing the view in the parent) bounds = a view’s location and size using its own coordinate system (important for placing the view’s content or subviews within itself)

What is frame in UIView?

Frame A view’s frame ( CGRect ) is the position of its rectangle in the superview ‘s coordinate system. By default it starts at the top left. Bounds A view’s bounds ( CGRect ) expresses a view rectangle in its own coordinate system.

Are bounds origin always zero?

The origins of a bounds is not always zero. Remember I said that the bounds origin is the origin of the view with respect to its own coordinate system, so in the majority of cases, the bounds origin is (0, 0) . A transform on the view’s coordinate system will affect its origin.

What is difference between bounds and frame?

The bounds of an UIView is the rectangle, expressed as a location (x,y) and size (width,height) relative to its own coordinate system (0,0). The frame of an UIView is the rectangle, expressed as a location (x,y) and size (width,height) relative to the superview it is contained within.

What is the difference between frame and bounds Swift?

At its simplest, a view’s bounds refers to its coordinates relative to its own space (as if the rest of your view hierarchy didn’t exist), whereas its frame refers to its coordinates relative to its parent’s space.

What happens to the the frame and bounds when performing a transform to the view?

Remember, the bounds is relative to the view’s own space, and internally to the view nothing has changed. If you transform the view, e.g. rotating it or scaling it up, the frame will change to reflect that, but the bounds still won’t – as far as the view is concerned internally, it hasn’t changed.

What is Cgrectmake?

Returns a rectangle with the specified coordinate and size values.

What is frame and bounds?

What is CG point?

The center of gravity (CG) of an aircraft is the point over which the aircraft would balance. Its position is calculated after supporting the aircraft on at least two sets of weighing scales or load cells and noting the weight shown on each set of scales or load cells.

How do I rotate CGRect?

How to rotate a CGRect about its centre?

  1. create a CGRect of the frame that I want.
  2. rotate that rect 90 degrees anticlockwise.
  3. set that rect as the frame of the label.
  4. rotate the label 90 degrees clockwise.

How is CG calculated?

Determine the CG by adding the weight and moment of each weighing point to determine the total weight and total moment. Then, divide the total moment by the total weight to determine the CG relative to the datum.

What’s the difference between frame and bounds in iOS?

The first thing I want to clarify is the difference between a view’s frame and its bounds, because this is something that trips up a lot of beginning iOS developers. The difference isn’t difficult though. On iOS and OS X, an application has multiple coordinate systems.

When to use the frame and the bounds?

Since frame relates a view’s location in its parent view, you use it when you are making outward changes, like changing its width or finding the distance between the view and the top of its parent view. Use the bounds when you are making inward changes, like drawing things or arranging subviews within the view.

What’s the difference between frame and bounds in UIView?

All UIView subclasses have two properties that at first glance seem similar: frame and bounds. Both return a CGRect – a rectangle containing their X and Y position, plus their width and height – but that doesn’t mean they are the same.

How are bounds laid out in a view?

In the same way, the coordinate system for a view’s bounds only cares about the view itself. It doesn’t know anything about where the view is located in the parent view. The bounds’ origin (point (0, 0) by default) is the top left corner of the view. Any subviews that this view has are laid out in relation to this point.