iOS Multitasking

The functioning of iOS backgrounding is frequently wondered about. The iOS backgrounding is different from the traditional multitasking.

According to traditional multitasking, when you multitask on your desktop, every program you open runs. This consumes the battery of your computer and creates pressure(and possible overload) on your RAM. On the other hand, in iOS backgrounding, there are seven distinct things that apps can do in the background so that the resources can be preserved and the RAM of your computer is utilized to the maximum with the minimum chances of overload. In this way, apps can also minimize your concerns regarding limited CPU, battery and RAM.

With the iOS multi-tasking designed to work without thinking about it, let us take a look at seven developer APIs that enable multitasking features in iOS.

1. Background Audio
With this app, streaming of music continues in background without processor time being devoted to unnecessary things. It does not keep going on updating the album art again and again or drawing the UI that can not be seen by the user. It restricts itself to playing music.

2. Voice Over IP
iOS using the VOIP apps continue to show to show themselves online while in the background. At the same time, they use very little of the system resource. They have many features regarding receiving and sending of mails and making phone calls in in a way similar to Skype.

3. Location Services
Location services need to be monitored when they display the little location arrow in the notification bar. They use less resources in the background mode but they certainly require power to the GPS and sometimes 3G radio (depending on the app).

4. Push Notifications
Push notifications serve as an alternative to the way a usual app that would require a notification would work. These notifications allow an app to receive an update, at the same time not keeping anything from the app alive. If you have installed too many apps in your system, more update notifications are bound to come. Instead of keeping a process alive for every app, iOS keeps a single service alive and accepts all incoming notification.

5. Local Notifications
Though similar to Push Notifications, local notifications allow apps to notify itself without an outside cloud service. It is easy to use local notifications with other backgrounding APIs, so that notifications can be used to something like sending a notification a user when a particular download is completed by the podcast.

6. Task Completion
Task completion allows apps that are put into background and continue to devote resources to something while in the background, for some time. iOS decides the amount of time that an app can continue to do things like this in the background, saving you from the hassle managing it. It also reduces the possibilities of limiting your data usage.

7. Fast App Switching
This API helps the apps like Alien Blue to save its state in RAM and exit. When you go back to the app, the app appears as if it was open all the time.

So are you ready to save your time, your RAM and the battery of your computer by using these seven APIs that make your iOS more efficient? Tell us in the comments section below.

SOURCE: Charles E Smith

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