iOS4: UI Update on Background
iOS4: UI Update on Background
- Subject: iOS4: UI Update on Background
- From: Angelica Grace Tanchico <email@hidden>
- Date: Fri, 25 Jun 2010 12:07:31 +0800
- Importance: Normal
Hello,
Based on iPhone Application Programming Guide document:
"Avoid updating your windows and views. While in the background, your application’s windows and views are not visible, so you should not try to update them. Although creating and manipulating window and view objects in the background will not cause your application to be terminated, this work should be postponed until your application moves to the foreground."
Can iOS4 make a suspended task come to foreground when a trigger occur? For example, in a voip app, an incoming call is received while the app is in background, can it make the voip app (currently in the background) into foreground (making the current loaded app suspended to background)? This way, any update on the windows or views can be done immediately (since the app will be forced to be loaded into foreground). Or will it like be on Push service that only notification can be shown? What can be the best way to implement when this scenario happens?
Thanks in advance!
Regards,
Angie
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