ipad - Is it acceptable to dynamically update UI in iOS? -

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we creating ipad app connects web service using user's id. depending on profile, need hide ui elements (tabs, toolbars).

in hig, under tab bar, says "if tab represents part of app unavailable in current context, it’s better display disabled tab remove tab altogether."

this not work app business reasons. able elaborate on whether quote above hard , fast rule or guideline?

if business rule, it. apple's human interface guidelines that... guidelines. not hard rule, don't make sense application.


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