Gordon, I use performSelector:withObject:afterDelay: (not exactly NSTimer but close, I would guess), but maybe they don't work exactly the same. I download from the Internet on a regular basis. I thought about those cases when the app is put to the background to sleep and all other situations depending on the user. I did some testing and, so far, I don't have to really make any exception when one of those situation occurs. If my app is put to the background and suspended, obviously, my performSelector:withObject:afterDelay: obviously don't fire. When the app is brought back to the foreground, they will fire if the delay I gave has elapsed. I haven't seen any problem so far. So, maybe your handling in your timer wrapper class of NSTimer is causing unnecessary problems? Just a wild guess. I have no idea what kind of comm links you keep opened, so I could be wrong...
-Laurent. -- Laurent Daudelin AIM/iChat/Skype:LaurentDaudelin http://www.nemesys-soft.com/ Logiciels Nemesys Software laur...@nemesys-soft.com On Feb 15, 2011, at 14:31, Gordon Apple wrote: > In accordance with the rules, I suspend timers (I have my own suspendable > timer wrapper class for NSTimer) and I terminate comm links when in the > background. No problem. It works. I get notifications when it > re-activates and can re-establish comm. Unfortunately, when the iPad screen > goes down, so does the comm link, but there is no notification when it comes > back up to allow re-initialzing the comm link, Bonjour, etc., and be able to > reconnect from the other side. > > Currently, my instructions to the users, in such case, is to switch out the > app, then switch back. That works, because then I get notification. > > Someone had a suggestion that I run a repeating 1 sec. timer and store > current time. If it ever shows being more than, say 2 sec. behind, then > that means it woke up, so reset the comm link. That might work. > > > On 2/15/11 2:25 PM, "Matt Neuburg" <m...@tidbits.com> wrote: > >> On Sat, 12 Feb 2011 13:01:28 -0600, Gordon Apple <g...@ed4u.com> said: >>> If it exists, could somebody point me to notifiers for sleep/wake in iOS? >>> >>> I have a comm link that goes down with sleep. I would like to bring it up >>> again on wake (in case the user forgot to disable sleep). I'm already doing >>> this for applicationWillEnterForeground, but that doesn't work for sleep. >> >> What is "sleep" in iOS? The user can lock the screen, but that might or might >> not cause the device to sleep, depending on a zillion other factors. Many >> things can continue happening in the background. The whole concept is a shaky >> one. >> >> If your app is backgrounded, you'll be suspended (freeze-dried) and all your >> code will come to a complete stop, unless you take certain special measure >> that qualify you for prevention of this (e.g. you're producing background >> audio). In that case you'll get applicationWillEnterForeground when coming >> back to the front. >> >> If the screen is locked and your app was in the background, it was already >> suspended and you're covered. >> >> If the question is "How can I cover the case where the screen was locked and >> is now being unlocked and my app is *frontmost*", that is your app becoming >> *active*. Basically for long continuous activities you should pause when the >> app becomes inactive and resume when the app becomes active again. Indeed, >> you >> will also get the active notification when entering the foreground, so it is >> a >> very good all-around place to cover resuming from interruptions of any kind. >> m. >> >> -- >> matt neuburg, phd = m...@tidbits.com, <http://www.apeth.net/matt/> >> A fool + a tool + an autorelease pool = cool! >> AppleScript: the Definitive Guide - Second Edition! >> http://www.apeth.net/matt/default.html#applescriptthings > > > > _______________________________________________ > > Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) > > Please do not post admin requests or moderator comments to the list. > Contact the moderators at cocoa-dev-admins(at)lists.apple.com > > Help/Unsubscribe/Update your Subscription: > http://lists.apple.com/mailman/options/cocoa-dev/laurent%40nemesys-soft.com > > This email sent to laur...@nemesys-soft.com _______________________________________________ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to arch...@mail-archive.com
