UIViewContentMode

UIViewContentMode enumeration contains constants that specify the position of a capture device.

const UIViewContentMode = {
    ScaleToFill: 0,
    ScaleAspectFit: 1,
    ScaleAspectFill: 2,
    Redraw: 3,
    Center: 4,
    Top: 5,
    Bottom: 6,
    Left: 7,
    Right: 8,
    TopLeft: 9,
    TopRight: 10,
    BottomLeft: 11,
    BottomRight: 12,
}

Constant	Description
ScaleToFill	The option to scale the content to fit the size of itself by changing the aspect ratio of the content if necessary.
ScaleAspectFit	The option to scale the content to fit the size of the view by maintaining the aspect ratio. Any remaining area of the view’s bounds is transparent.
ScaleAspectFill	The option to scale the content to fill the size of the view. Some portion of the content may be clipped to fill the view’s bounds.
Redraw	The option to redisplay the view when the bounds change by invoking the setNeedsDisplay method.
Center	The option to center the content in the view’s bounds, keeping the proportions the same.
Top	The option to center the content aligned at the top in the view’s bounds.
Bottom	The option to center the content aligned at the bottom in the view’s bounds.
Left	The option to align the content on the left of the view.
Right	The option to align the content on the right of the view.
TopLeft	The option to align the content in the top-left corner of the view.
TopRight	The option to align the content in the top-right corner of the view.
BottomLeft	The option to align the content in the bottom-left corner of the view.
BottomRight	The option to align the content in the bottom-right corner of the view.

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Info

For more information, please see the official Apple documentation.