Beginning iOS 5 Application Development

SUMMARY

In this chapter, you have seen how background execution works and how you can utilize it to make your applications more useful. You have also seen the other types of notifications that you can utilize in your applications — scheduling local notifications though the operating system, and using the NSNotification class for notifying objects within your application.

Combining all the different concepts discussed in this chapter will enable you to write compelling iOS applications.

EXERCISES

1. Name the three types of applications that are allowed to execute in the background.
2. Which devices support multitasking?
3. For the CLLocationManager class, when should you use the startUpdatingLocation and startMonitoringSignificantLocationChanges methods? Why?
4. What is the difference between Apple Push Notification service and local notifications?

Answers to the exercises can be found in Appendix D.

WHAT YOU LEARNED IN THIS CHAPTER

TOPIC	KEY CONCEPTS
Opting out of background execution	Use the UIApplicationExitsOnSuspend key.
Tracking locations in the background	Use the UIBackgroundModes key.
Monitoring significant location changes	Use the startMonitoringSignificantLocationChanges method.
Creating local notifications	Use the UILocalNotification class.
Scheduling a local notification	[[UIApplication sharedApplication] scheduleLocalNotification:localNotification];
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