What activities/events trigger the height of the status bar to change on the iPhone?
For example: When an application is visited while in a phone call the height of the status bar [[UIApplication sharedApplication] statusBarFrame]
is 40 instead of it's normal height of 20.
The iOS Simulator has an option Hardware>Toggle In-Call Status Bar. When that is selected the UIApplicationWillChangeStatusBarFrameNotification
and UIApplicationDidChangeStatusBarFrameNotification
are posted.
What user actions and/or phone actions cause this to happen? Are there any activities besides phone calls that cause the status bar to be taller than 20 pts?
@Bogatyr is right, Internet tethering is one.
Audio recording (such as with the voicememos.app) is another.