Understanding autoresizing property and masks

Question

In terms of the images, to which image does the value UIViewAutoresizingNone correspond to when set on a view?

Answer 1

You are right the image you shown is equivalent to UIViewAutoresizingNone .

The Autosizing, you can see from Interface Builder is something like,

While programmatically these struts behave ' reversed ' of above image like,

Here are some example for AutoSizingMask - Programmatically vs XIB.

• ( UIViewAutoresizingFlexibleWidth | UIViewAutoresizingFlexibleHeight ) is equivalent to

• ( UIViewAutoresizingFlexibleTopMargin | UIViewAutoresizingFlexibleBottomMargin |UIViewAutoresizingFlexibleLeftMargin | UIViewAutoresizingFlexibleRightMargin ) is equivalent to

• UIViewAutoresizingNone is equivalent to

• ( UIViewAutoresizingFlexibleWidth | UIViewAutoresizingFlexibleBottomMargin ) is equivalent to

• ( UIViewAutoresizingFlexibleRightMargin | UIViewAutoresizingFlexibleTopMargin ) is equivalent to

• ( UIViewAutoresizingFlexibleLeftMargin | UIViewAutoresizingFlexibleRightMargin | UIViewAutoresizingFlexibleTopMargin | UIViewAutoresizingFlexibleBottomMargin | UIViewAutoresizingFlexibleWidth | UIViewAutoresizingFlexibleHeight ) is equivalent to

• ( UIViewAutoresizingFlexibleRightMargin | UIViewAutoresizingFlexibleBottomMargin | UIViewAutoresizingFlexibleWidth | UIViewAutoresizingFlexibleHeight ) is equivalent to

• ( UIViewAutoresizingFlexibleLeftMargin | UIViewAutoresizingFlexibleRightMargin | UIViewAutoresizingFlexibleWidth ) is equivalent to

• ( UIViewAutoresizingFlexibleBottomMargin | UIViewAutoresizingFlexibleRightMargin | UIViewAutoresizingFlexibleLeftMargin )

Answer 2

Do this for the UIViewAutoresizingNone :

And for the future reference just use the side example which shows how your Autosizing will behave:

Answer 3

Yes, the image in your question means UIViewAutoresizingNone . The bars on the outside being set mean 'non-flexible' but the arrows on the inside being set means flexible .

Note that if you try to set UIViewAutoresizingNone and then resize the superview it won't be respected as something has to change.