ios - "Size to Fit content" in Interface Builder only works sometimes? -

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"size fit content" in interface builder works sometimes?

how come? 2 seemingly exact button, different images (from asset catalog), 1 of them can autoresized while other cannot; size fit content greyed out 1 of them.

update: 2nd button time, restarted xcode , magically works... normal?

the menu option greyed out if item has been sized fit.

if want test this, change content width or height. deselect , reselect item (the menu seems update when select item) check menu item. no longer greyed out.


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