objective c - What are the iPhone activities that change the height of the status bar? -

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what activities/events trigger height of status bar change on iphone?

for example: when application visited while in phone call height of status bar [[uiapplication sharedapplication] statusbarframe] 40 instead of it's normal height of 20.

the ios simulator has option hardware>toggle in-call status bar. when selected uiapplicationwillchangestatusbarframenotification , uiapplicationdidchangestatusbarframenotification posted.

what user actions and/or phone actions cause happen? there activities besides phone calls cause status bar taller 20 pts?

@bogatyr right, internet tethering one.

audio recording (such voicememos.app) another.


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