Multitask

not sure if this has been posted before or not. Im having trouble with Multitask when playing a game double click home button go to another app then go back to the game it starts over. thanks for any help

App hasn't been recompiled with the 4.0 SDK, so it doesn't 'multitask'. Once the 'iOS4 Multitasking' version of the app is released, it should be fixed.

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More than one VI at a time (i.e. multitasking)

Hello.
I currently work in a lab where we use LabVIEW to control an multifunction instrument. We use the sofware both for data acquisition (through Ni-DAQ) and for physical control of things like stages, and frequency generators (e.g. through GPIB). There are a few programs that do very simple things (like move a stage with a joystick, or turn a laser on and off) that I would like to run continuously in the background while I run other more specialized software (like a data acquisiton routine). However, when I run more than one VI at the same time I run into very bad timing problems. Some of my programs require this kind of multitasking and I have implemented it using a sort of Master loop (similiar to the Master/S
lave paradigm discussed on the NI website).
If I were to purchase the compiler and build executables out of some of the VIs, would I be able to run these in the background while LabVIEW runs other VIs without running into timing issues?
Also, if I build executables from some of the VIs would these VIs be able to access global variables that LabVIEW is using (I assume the answer is no, but I figured I'd ask).
Thanks,
Josh
[email protected]
=====================
Joshua Shaevitz
Department of Physics
Stanford University
Stanford, CA 94305

First, do you know where your timing problems are coming from? Are some of those background tasks very processor intensive, or is the problem that you're sharing subVIs that aren't reentrant (and hence may be "blocking" each other)? Have you tried multithreading the application yet (running the motion control in one thread and the laser control in another, for instance)?
Splitting your tasks between multiple executables might help, but it will almost certainly increase the overhead of each background task, and you will not have common access to global variables. You could, however, work around that by instituting a common data repository as one of your background tasks (presumably accessed through a messaging interface).
In fact, I would probably suggest
this as a method of performance optimizing your application anyway -- if you are using globals extensively for parallel operation, they might be part of the blocking problem.

Multitasking on iPod Touch 4G, running iOS 6.1.2, nearly impossible. Opened, background apps do not seem to stay in memory and must "reload" every time I switch back to them. Also, intense battery drain (imo).

Let's say I'm playing Words with Friends, and also Angry Birds. I may want to go back and forth between the two. When I do so, the app that was in the background needs to reload again. There is no quick access or ability to quickly resume where I left off. And the reloading means that the app restarts from its opening screens...so if I was working on a level, I have to start all over again. And quite often, a game like Angry Birds will lag greatly when I first open it...moving almost in slow-motion.
I don't know if this is typical behavior when playing multiple games, or if I have an issue with my device. I've rebooted and even reset and restored, all to no avail.
There doesn't appear to be as much of an issue if I'm playing one game but also have the music player open, or Safari, Notes, Reminders, etc. Those will resume just fine, though there may be some lag when opening/re-opening them.
So I guess the problem seems to lie within 3rd party apps, and not the apps that are part of the iPod/iOS.
The other problem is battery drain. I do all of my music listening via Bluetooth, so I expect that to have a greater impact than if I were using plugged in headphones, and I have location services turned on. But I have most notifications turned off, all email accounts set to manual and not push, screen brightness turned down and auto brightness turned on, "ask to join networks" turned off, auto-lock is set to 2 minutes but I almost always turn off the screen immediately after setting up my music listening (since I do so at work), volume limit turned on, EQ turned off, sound check turned off,
With these settings, my battery can drain 20% or more within 10-15 minutes of game play. And these are not what I would consider memory intensive games--just Words and Angry Birds.
I've installed (and recently uninstalled) a couple of battery meters from the Apple Store as well--freebies. Carat, Battery Doctor, Battery HD, Battery Magic.
Carat and Battery Doctor seemed to offer the most pertinent and accurate information so the others were uninstalled long ago.
The Accelerate tab in Battery Doctor show the amount of memory in use, and the amount of available memory. The vast majority of the time, the memory in use is approximately 94%. I will occasionally choose to "accelerate" which supposedly frees up memory, but this "bump" lasts only a brief time and I'm not sure it's a great idea.
Even with absolutely nothing open or running, my used memory is generally still above 80%.
Carat, if anyone is familiar with it, shows a J-Score. My J-Score is 17, which means that my performance (according to Carat, anyway) is better than only 17% of the users who have Carat installed. In other words, 83% of people are getting better performance from their devices. It also has "battery hog" and "battery bug" sections. It doesn't detect any hogs or bugs.
I use my iPod Touch in rather limited ways. A typical day consists of approximately 5 hours of music listening via Bluetooth and 30 minutes to 1 hour of playing the aforementioned games. The occasional note and reminder, perhaps a brief check-in with the weather, and that's about it. And wifi is in use only when at home (there is no hotspot at work). Still, I need to charge it every day. I'd be keen to do more with the iPod if I could count on it to last more than a day.
I've read up on multiple forums and blogs for tips on prolonging a battery charge, and believe I've taken everything into account, and applied whatever I could. I've even reset the network settings and try to discharge the battery completely once a month (for supposed battery calibration).
I'm really hoping people can offer some suggestions or comments on whether this is typical behavior or if my battery is going, or even offer some additional tips.
With iOS 7 on the horizon, I'm hoping the upgrade will offer some resolutions (I've read there is better multitasking), but considering how weakly my device performs at this point, I'm not entirely convinced that an iOS upgrade will actually make any improvements.
Thanks a lot for reading.

No, the app does not have to completely restart. It gets shifted in its open state into storage. Similar to how a computer uses the hard disk when it has insufficient memory.
What complicates things is that sometimes memory does not get returned for reuse when you close an app. Thus yo should periodically double click the Home button and "delete" unnecessary apps from the multitasking dock and power off and then back on the iPod.

MacBook Air or Pro for 2012 Student (heavy multitasker)?

Hey Apple Community,
Brief Background: I have been using the MacBook (December 2010), and it has been a boon - but it is time to move on. I waste anywhere between 1-3 hours just waiting for it to load, or else having to reboot it and open things again. Whatever I do, within an hour of use it just lags to the point where I end up doing my work on my iPhone or relocating to the school library where I can use a PC.
As such, I want to buy a new MacBook. I will be writing two books, doing academic research, and soon starting my JD.
I need a computer mainly for the following tasks:
- Word processing et al (pages, word, powerpoint)
- Internet (heavy multitabbing ... I mean very heavy)
- Internet streaming films, shows, etc.
- Music (Itunes)
Perhaps most defining, I do all of these at the same time, utilizing Apple's 'Spaces' feature to the max - so the chosen mac would have to be very Multitask-Friendly (VERY!). I want something that will be able to effortlessly hold up all of these tasks at the same time. Harddrive space is less important (I am willing to put all of my music, movies and photos on an external harddrive if necessary). I'd like a computer that can do all of this very quickly, and would also be very portable (but I think the Pro is lightweight enough).
I am leaning towards the MacBook Air.
I would be grateful for any help at all.

I think the MBair would meet your needs. Here's a comparison with the MBpro.
http://news.cnet.com/8301-13579_3-57458148-37/13-inch-macbook-air-vs-13-inch-mac book-pro-which-should-you-buy/?tag=postrtcol;posts

Okay, so I try to open an app, but for some reason, I can't close out of the app, multitask, or even shut of my iPod, so it won't lock, but I have the time set to two minutes but its been half an hour and it still didn't lock. Please tell me if fixable.

I try to open up a texting app, and now, it won't lock, exit out (or crash suprisingly), multitask, or even power off. I also had auto lock set to two minutes and it has been about a full hour and it has never locked. If there is someone out there who has the same problem as me, and knows how to fix it, PLEASE TELL ME!!! I have a lot of texts that need to be answered... I also use the Assisstive touch and please tell me if that affects anything about these problems.

Try:
- iOS: Not responding or does not turn on
- Also try DFU mode after try recovery mode
How to put iPod touch / iPhone into DFU mode « Karthik's scribblings
- If not successful and you can't fully turn the iOS device fully off, let the battery fully drain. After charging for an least an hour try the above again.
- Try on another computer
- If still not successful that usually indicates a hardware problem and an appointment at the Genius Bar of an Apple store is in order.
Apple Retail Store - Genius Bar

What is the point of the multitasking bar?

So, I get that for Pandora, Skype, etc. that multitasking is great. I just opened up my multitasking bar though, and found the following "open" items: Messages, Mail, Calendar, Camera, Settings, Map, Weather, Calculator, YouTube, Compass, IMDb, Facebook, Twitter, Shazam, and four games.
Why in the world would I care about saving my session for any of these? Especially when they all go back to the same screen as I was at last time anyway. Now I have to go through and "close" all of them?
I feel like I'm missing something. Can anyone shed some light for me?

The purpose of the multitasking bar is to keep your apps running in the background with seven key features. Amongst those features are:
* Fast App Switching - Pauses games and apps until you swap back or press the icon in your home screen to resume it.
* Background Running and Location Services - GPS, music and social apps still run and announce directions for you while you are navigating other screens. But utilize FAS to lower power costs.
* File Transfers and Task Completions - You're uploading a 50KB photo to your Facebook page and want to go elsewhere while it's going on. It'll freeze the app in the meantime but continue the file transfer until it's done then lock it down.
You don't have to re-open multitasker to reactivate the app. You can open the file from the home screen and it pops back up.
The ideal for the multitasker also if you wish to increase battery life and performance is you can close them at will including reactivate the apps there. However if you close them, you have to start from the beginning of the application. Making it take longer to resume your sessions.

Use multi-touch to close more than one app at a time in the multitask bar!!

Is this a new feature? I was always annoyed that I had to tap each red x one at a time to close an app on the multitasking bar, so I decided to try and tap several at a time and voilà! It works! I've been able to tap two at a time. Let me know if anyone can do more! I wish they would add a "close all" button, but in the meantime this helps a lot!!!

You only have two fingers? Yes, you can close 4 at a time.

Frequent LowMemory crash when starting multitasking by double-click Home button

After upgrading iOS 7, my iPhone 5 crashes when double-clicking home button for multitasking.
The crush shows white apple logo and reboots my iPhone.
It occurs about 2-3 times a day.
Every time crash occurs, Diagnostic & Usage Data would add a LowMemory log, which is exactly the time iPhone crashes.
Therefore I guess it's because of running out memory.
I've tried Reset My Phone, Reduce Motion, Disable Background App Fresh..., but none of it worked.
My iPhone begins to crash 3 days after resetting.
Does anybody know how to solve it?

I think you mean crash.
Also, I am going to assume you've tried restarting and reseting. What you can do is back up the important information in your phone (using either iTunes or iCloud) and restore the device as new. Then, you can restore from your backup. This will remove any and all software bugs.

Multitasking bar? Does this constantly use data?

Hi,
Unfortunetly AT&T did away with their unlimated data feature so I'm stuck with the 2gb per month plan. My question is when I leave an app in the multitask bar does this constantly use my data? I have notifications turned off and I have my mail set up for me to manually load it. It's becoming a pain to have to keep an eye on which apps are running and to not be able to shut the app completely down when I close it, instead I'm going to my MTB every 10 min. to kill apps.
Thank you!

I popped into the AT&T store this afternoon and confirmed that I could keep my unlimited plan and still have a family plan. Which is nice, not sure I need it but it does offer another choice.
I've been relatively uninspired by AT&T's service in my area and researching changing to the Droid X as well. It does have a few features that are attractive like a replaceable battery, storage on a replaceable card and so on. The display on the iPhone 4 is simply amazing though and I already prefer the interface of the iPhone to the Droids, so it's probably going to be an upgrade instead of a switch of providers.
The video conferencing on the iPhone is a nice feature but since it's required to be over wifi on each connection, the chances of both my wife and myself being on wifi at the same time unless we're in the house together are slim to none and slim left town. So, great feature, not very practical.
I did find one thing unique today, the sales guy at AT&T had his own iPhone 4 and we did a couple of speed tests while I was there vs my 3GS. Now we were both on 3G at the time and really the speeds should have been almost identical as the processor should have nothing to do with the transmission speed over 3G but his phone blew mine away. A bit on the download but a huge amount on the upload. Kind of makes me wonder if there's been something wrong with my 3Gs that I wasn't really aware of?

Ideas for PlayBook Multitasking for RIM

I was thinking about some of the comments that people have made here and elsewhere about wanting to truly multitask with the PlayBook. That is in how we work, nit just the hardware.
Maybe we can throw some ideas in here and hope that RIM take some of it on board.
- Allow an app to overlay another, á la picture-in-picture. Great for copying stuff.
- Portrait mode could split screen two apps. One on top and one below.
- Web browser could (and should) appear as separate tasks rather than just a single app. Cool if this could be turned on and off.
- Reorder the running apps in the minimized view to that we can clump them together. Oh, better yet, we could lasso them together so that we are working on task-focused programs together, and a swipe up would show is a screen full of those running programs so we could easily jump between them. I believe that the bottom right corner isn't being used at the moment.
Does anybody have other ideas about how we can really multitask with the PlayBook?
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funny how they copy stuff all the time, I though they might have taken a few ideas.
weird how another company copied BlackBerry Protect and maybe BBM too.
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Is there another way to close apps other than deleting them from the multitask bar.....I have a small crack in the bottom of my screen and that part of the screen does not recognize the touch. :(

Is there another way to close apps other than deleting them from the multitask bar.....I have a small crack in the bottom of my screen and that part of the screen does not recognize the touch.

There's generally no reason to be closing them that way at all. The apps you see in the recents bar are just that, apps that you used recently. Most of them are doing absolutely nothing. The only apps that are really doing anything in the background are ones that play music and ones that are using location services. Just leave them be.
Best of luck.

My iPhone 4s no longer has sound for any of the applications but it does have sound for phone functions. Where is the setting for app sound? I have gone to the multitask screen and the volume bar is empty.

I recently found my phone outside in light rain (it had been there about 20 minutes). It had some glitches at first, however after letting it rest overnight it seemed to mostly recover. The one problem I am having is that I no longer have sound for any of my applications. I do have sound for phone fuctions, and I am able to use the speaker for phone functions.
When I am in my applications, including music/videos, the only way I can hear is if I use my earbuds. I am able to make a video and it will record sound just fine.
When I go to the multitask screen, the volume bar is empty and I cannot adjust it using the side buttons (even though in settings I have that feature activated). I completely reset all of my settings tonight and that did not make a difference.
Is there a setting I am missing, or am I just SOL? I am trying to avoid having to get a whole new phone but it is very frustrating to not have sound with my applications.

Hi Baileyfour,
Welcome to the Support Communities!
The articles below may be able to help you with this issue.
Click on the link to see more details and screenshots.
iPhone: Can't hear through the receiver or speakers
http://support.apple.com/kb/TS1630
There are two places where vibrations can be set.
One is the Settings > Sounds
The other area is Settings > Notifications
If you have an app set to Alert, it may have a vibration set for it.
iOS: Understanding Notifications
http://support.apple.com/kb/ht3576
Information about Notifications settings can also be found in the iPhone User Guide (pages 131, 132)
http://manuals.info.apple.com/en_US/iphone_user_guide.pdf
I hope this information helps ....
Have a great day!
- Judy

My ipod app no longer works. Everytime I go to open the ipod app it stays open for a second and then shuts down. I am not able to get anything to play either through the standard ipod controls or the multitasking control panel. I'm sure there will be an u

my ipod app no longer works. Everytime I go to open the ipod app it stays open for a second and then shuts down. I am not able to get anything to play either through the standard ipod controls or the multitasking control panel. I'm sure there will be an update soon to correct this, i just wanted to see if anyone else was having the same problem.
wen i open ipod in my iphone ,, it gets stuck ,, and get backs to the menu ,,, and doesnot play anything ,, not video nor song

If your phone is not officially unlocked by the carrier in the UK, you can not use the phone using another SIM, unless you modify the software or the SIM, which can lead to unexpected results, such as non functioning apps.
Unauthorized modification of iPhone OS has been a major source of instability, disruption of services, and other issues
Problems resulting from those modifications can't be discussed in these forums, due to the Terms of Use

Multitasking no longer working in games or apps?

On my iPod touch, in iOS4, multitasking no longer works. When I first got the firmware, multitasking was working perfectly fine. But now, when I double tap home button while I am in games, no little dock with all my apps that are running pops up. And when I double tap the home button while I am on the home screen, the black bar that SHOULD have all my games and stuff on it doesn't work and I cannot swipe so I see my music controls. Please help, because multitasking is a big part of this update for me.

How about resetting your iPod Touch as described [HERE_|http://www.apple.com/support/ipodtouch/assistant/ipodtouch/#section2]. See if that brings the function back up.
Axel F.

Since I have installed iOS 6.1.3 on my iPhone 5 I have sometimes problems to start a phone call. Everything looks fine, but no ring tone... A workaround is to stop phone app in the multitasking bar. But this is more than inconvenient ;-) Any solution?

In this cases everything looks fine, but no ring tone is there and after sometimes the phone informs me that no connection can be estabilished (its a German phone, therefore I am not sure about the message in English systems). A workaround is to stop the telephone app in the multitasking bar (double click on home button, hold the app symbol pressed for some seconds, close app). Next several call work after this.
I am not sure if an incomming call would work in this mode...
Faces anybody the same problems or has solution for it?

Basic troubleshooting
Restart
Reset
Restore with backup
restore as new if required

Shutting down my iPhone 4S no longer removes all the apps that have accumulated on the multitasking bar. What happened?

Maybe I imagined it, but I could have sworn that holding down the home button and sleep button at the same time until the slider icon appears at the top of the screen, and then engaging the slider icon, completely shuts down your iPhone and also removes all the apps that have accumulated in the multitasking bar. But, that does not work anymore on my iPhone 4S running iOS 5.0.1 (9A405). The iPhone shuts down, but the apps in the multitasking bar remain after you turn the phone back on. Did I imagine this feature in the past, or has something happened that no longer enables this functionality? Closing all those open apps in the multitasking bar one at a time is a PIA.

imanfromsweden wrote:
Please apple support do you people have a convincing answer for us? Is there a solution? My phone is only 2 years old and was (2 hours ago), in top condition!!
Please help....
On belhalf of my fellow volunteers, the answer is, "We'll try our best."
My advice is to try not to treat this like it is a paid service provided by compensated professionals. Ask nicely and one of the nice folks here might take some time out of their weekend to offer advice.

Multitask

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