Sorry for the delay in response. I'll need more help. I follow suggestions on using applicationDidFinishLaunching: and applicationWillTerminate: methods on AppDelegate.
It won't print NSLog when I stop the app on Console and throw errors when I leave the app on simulator by pressing the home button to exist the app like the device. I didn't get any warnings or errors on building the project. I used NSLog(@"Session: %.1f", [now timeIntervalSinceDate:then]); Please help! *project code:* http://code.google.com/p/iphonebuilder/downloads/list - (void)applicationDidFinishLaunching:(UIApplication *)application { // Starting Session } - (void)applicationWillTerminate:(UIApplication *)application { // Ending Session } *Errors on console when I exit the app on simulator* *** -[NSObject timeIntervalSinceReferenceDate]: unrecognized selector sent to instance 0x521fe0 2009-04-28 17:07:32.283 sessiontime[22584:20b] CoreAnimation: ignoring exception: *** -[NSObject timeIntervalSinceReferenceDate]: unrecognized selector sent to instance 0x521fe0 On Wed, Apr 22, 2009 at 9:57 AM, Luke the Hiesterman <luket...@apple.com>wrote: > What's wrong with the NSDate solution below? > > Luke > > On Apr 21, 2009, at 10:49 PM, Bess Ho wrote: > > I couldn't get any working responses from iphone developer forum or iphone > meetup group. I am hoping that this group with more experience cocoa > developers with understanding on MVC model, Xcode. > > On Tue, Apr 21, 2009 at 6:47 PM, Luke the Hiesterman > <luket...@apple.com>wrote: > >> Sounds like you've already answered your question. >> >> Luke >> >> On Apr 21, 2009, at 4:00 PM, Bess Ho wrote: >> >> Is this appropriate mailing list to ask iphone SDK questions? >>> >>> How do you measure session duration on a utility application with 3 >>> ViewControllers? >>> >>> Use NSDate to mark the starting and ending the session and print the time >>> lapsed on NSLog. >>> >>> -- >>> Bess Ho >>> _______________________________________________ >>> >>> 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/luketheh%40apple.com >>> >>> This email sent to luket...@apple.com >>> >> >> > > > -- > Bess Ho > > > -- Bess Ho _______________________________________________ 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
