Comments on: Understanding iOS 4 Backgrounding and Delegate Messaging

By: iOS 4.0 이후의 Delegate Messaging

iOS 4.0 이후의 Delegate Messaging — Mon, 27 Feb 2012 14:35:43 +0000

[...] Background 실행이 되지 않던 iOS 3.x 버젼들과 Background 실행이 되는 iOS 4.0 이후에서 차이가 있는데요, 해외 블로거 한분이 잘 정리해 주셨습니다. 원문 링크 : http://www.cocoanetics.com/2010/07/understanding-ios-4-backgrounding-and-delegate-messaging/ [...]

By: jeff

jeff — Fri, 24 Feb 2012 04:25:00 +0000

For IAP (In App Purchase) it does this:

Foreground Run Loop
Interruption (Want to buy an IAP)
applicationWillResignActive
You are now being asked by App Store to confirm your IAP purchase
applicationDidBecomeActive
Foreground Run Loop

Notice that it does NOT do applicationDidEnterBackground (whether you buy an IAP or not).

Its always applicationWillResignActive > applicationDidBecomeActive everytime.

This can actually occur 2 or 3 times during the IAP process.

More info
http://stackoverflow.com/questions/9424302/how-to-know-that-skstorekit-in-app-purchses-caused-applicationwillresignactive

By: Youyou

Youyou — Thu, 15 Dec 2011 20:07:40 +0000

Nice diagram BUT it does not depict launch-into-background like one sees in Newsstand.

By: Brian King

Brian King — Tue, 15 Nov 2011 22:50:45 +0000

Been working on some iOS5 changes, and a few notes:

Lock screen iOS5
– resignActive -> didEnterBackground

Lock Screen iOS4
– resignActive

Notification Center Slide down / Slide Up
– resignActive / becomeActive

@KingOfBrian

By: Pikku-uutisia « Aikahyppy

Pikku-uutisia « Aikahyppy — Mon, 17 Oct 2011 20:59:41 +0000

[...] AppDelegaten metodien suuntaan. Asiaa on selvitetty suht. selkeästi Applen Dev Centerissä ja Cocoaneticsissä, mutta kuten aina, periaatteen tajuamisesta on vielä aika lailla matkaa siihen, että hoksaa mitä [...]

By: Aditya

Aditya — Mon, 03 Oct 2011 05:18:00 +0000

This is fabulous work!!

By: iDevShort: UIApplication delegate и Сон приложения | iTux  iDev.pro

iDevShort: UIApplication delegate и Сон приложения | iTux  iDev.pro — Sat, 10 Sep 2011 15:24:10 +0000

[...] Картинки взяты от сюда [...]

By: Adoption Curve » Blog Archive » links for 2011-07-18

Adoption Curve » Blog Archive » links for 2011-07-18 — Tue, 19 Jul 2011 00:11:09 +0000

[...] Understanding iOS 4 Backgrounding and Delegate Messaging | Cocoanetics Flowchart showing how application backgrounding functions in iOS4+ (tags: ios objectivec apple code development) [...]

By: Conexión de la interfaz con el código fuente: XCode + Interface Builder | Objective C | Programador PHP .ORG

Mon, 06 Jun 2011 23:14:33 +0000

[...] sacado de cocoanetics: understanding iOS 4 Backgrounding and delegate messaging [...]

By: Milan

Milan — Thu, 19 May 2011 09:24:51 +0000

Hi Drops,
Good article and well written. This is very helpful understanding the complete flow.
Thanks.

By: MarcS

MarcS — Wed, 18 May 2011 11:49:37 +0000

Hi,
your flowchart is missing one more connection – from (Background Run Loop) to [applicationWillTerminate].
While this usually does NOT happen, it might when iOS desperately needs resources for the front application.

See:
https://devforums.apple.com/message/433968#433968

By: Basic Delegate Example « Chris Mills

Basic Delegate Example « Chris Mills — Thu, 05 May 2011 09:31:36 +0000

[...] you’ll wonder how you lived without leveraging them. If you want to read more check out cocoanetics for some info on delegate messaging in iOS with respect to the background task [...]

By: Alexis

Alexis — Wed, 20 Apr 2011 07:06:15 +0000

Thanks a lot for your great work. I imagine it was hard to make a readable schema. It’ll help me!

By: Michael

Michael — Sun, 27 Mar 2011 00:40:17 +0000

Thank you for your clear explanations and diagrams. This is the best description of iOS backgrounding that I’ve found!

By: Drops

Drops — Mon, 14 Mar 2011 11:08:57 +0000

I don’t understand where you’re going with your question.

By: Forrest

Forrest — Mon, 14 Mar 2011 09:31:16 +0000

For each application, there are two modes : foreground and background , there is no 3rd , right ?

So if correct, I want to know which mode applicationWillTerminate: run ? From the chart, seem like it is in Foreground, but if so, if user pick up telephone, the app will go to background first, then check SDK >= 4, if answer is No, it will go to applicationWillTerminate: (in foreground mode ) .
Welcome further talk with apple.dev.sh(at)gmail.com
Thanks

By: Jacob Stein

Jacob Stein — Sun, 06 Mar 2011 23:30:26 +0000

Very helpful. Thanks!

I’m curious about this:
“This requirement is either set in info.plist or by telling the OS that you have a task to complete, like for example a file upload.”

How do you inform the OS that you have an on-going task that needs to complete?

By: GopiKrishnAn

GopiKrishnAn — Sun, 27 Feb 2011 17:46:33 +0000

heartfelt thanks Drops.! Will try it out.

By: Drops

Drops — Sun, 27 Feb 2011 17:42:57 +0000

Depends on what kind of multitasking you are referring to. The only way how you could achieve the app exiting in iPad would be to do exit(0) to quit it.

By: GopiKrishnAn

GopiKrishnAn — Sun, 27 Feb 2011 17:27:52 +0000

hi Drops!
is there any option to enable multitasking only for iPhone in an Universal app? I dont want my app to run in background in iPad.