We're developing iPhone GPS application for car drivers.
As you probably know, iOS4 introduced multitasking, so our application can run in background - and it is. It's part of its functionality.
The problem is with standard method of closing applications on iOS4. Here are two scenarios:
1) User wants to put application to background:
Typically, on iPhone iOS4 it is as easy as pressing 'home' button.
2) User wants to turn application off (ie. after arriving to his destination point):
Standard iPhone iOS4 procedure is as follows:
- press 'home' button - application goes to the background
- press 'home' button twice - list of running applications appears
- tap and hold one of the applications icons - all icons 'shake' and '-' sign appears on each one
- tap '-' sign at the application icon user wants to terminate
User has to terminate our application each time he arrives somewhere (like, twice a day), to save his battery. If he does not - GPS would consume all the battery power really quickly. Also, we can't disable GPS while running in background, because we need precise location information for main application functionality.
Of course you can't change the behavior of 'home' button from your application (to be accepted to AppStore). Also I don't think it would be good solution to change expected behavior to something completely different than other applications on the iPhone platform.
What do you think about that? Do you know any good solution. We have one idea but I don't want to suggest anything to you yet.
Our idea for solution is very simple: Simply, show small 'x' button at the top right screen corner. Tapping it terminates the application (perhaps after some confirmation question).
This solution has one big advantage: it does not change default system behavior - users aware of iOS4 multitasking usage could still press 'home' button to run app in the background and close it iPhone-way.
What do you think?