Comments on: Demo of Fast App Switching apps on iOS 4 https://isource.com/2010/06/20/demo-of-fast-app-switching-apps-on-ios-4/ #1 Source for iPad, iPhone, iPod, Mac and AppleTV Mon, 04 Oct 2010 01:31:47 +0000 hourly 1 https://wordpress.org/?v=5.4.6 By: Thomas https://isource.com/2010/06/20/demo-of-fast-app-switching-apps-on-ios-4/#comment-24445 Mon, 21 Jun 2010 20:48:04 +0000 http://isource.com/?p=18384#comment-24445 In reply to Jordan Pearson.

Oops — revise my last comment. There is no such thing as background updating. I meant to say that they can finish uploading a file in the background (if an app updates with that API), but there is now background downloading of info. Only stuff like IM's from Beejive, etc. do this, and that's through push notifications.

]]> By: Jordan Pearson https://isource.com/2010/06/20/demo-of-fast-app-switching-apps-on-ios-4/#comment-24427 Sun, 20 Jun 2010 23:23:33 +0000 http://isource.com/?p=18384#comment-24427 Thanks for such a thorough answer. That's actually what I was hoping for cause lord knows I already have to charge my iphone way too much! For my uses, I don't need to be switching between apps very much, but knowing that it won't eat up my battery excessively lets me know I'll be okay with upgrading. Thanks again.

]]> By: Thomas https://isource.com/2010/06/20/demo-of-fast-app-switching-apps-on-ios-4/#comment-24424 Sun, 20 Jun 2010 21:38:06 +0000 http://isource.com/?p=18384#comment-24424 In reply to Jordan Pearson.

Thanks Jordan

Fast app switching is a lot like the state saving that's already present in certain apps. The difference is that Apple basically added a switch to toggle this behaviour on developer side (I think default setting is on, according to Marco Arment's blog). This means it's much easier for devs to implement — or should be (I'm no dev).
However, what I do know is that it uses up no more battery than before. These apps aren't actually running in the background, unless they're actively uploading or downloading. They just save exactly where they were so that reloading is so fast it *feels* like multi-tasking.
This is different from actual tasks that can now run in the background, like uploading or downloading, background audio, etc.

]]> By: Jordan Pearson https://isource.com/2010/06/20/demo-of-fast-app-switching-apps-on-ios-4/#comment-24423 Sun, 20 Jun 2010 20:24:27 +0000 http://isource.com/?p=18384#comment-24423 Say if you had 2 apps running, (ie. evernote and calendar), would it consume double the battery power? Or when an app gets switched to the background, does it go into a sort-of "sleep" mode where it consumes less power? This is my number one concern/question with OS 4. If it consumes the same amount of battery, I might as well just close an app before switching and save myself the hassle of charging my iPhone even more than I already do. I haven't read anything about this, and I'm very curious! Great vid Thomas!

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