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2014/10/15 ¤U¤È 10:09:15
iphone Programming Glossary: foregroundWhat happens if I don't retain IBOutlet? http://stackoverflow.com/questions/1250518/what-happens-if-i-dont-retain-iboutlet say a different view controller is pushed on the UINavigation Controller's stack so that this view is no longer in the foreground. In the case of a memory warning the view of this offscreen view controller will be unloaded. At this point the view property..
http://stackoverflow.com/questions/1309757/blend-two-uiimages two uiimages I'm trying to blend a background with a foreground image where the foreground image is a transparent image with lines on it. I am trying to do it this way. UIGraphicsBeginImageContext.. two uiimages I'm trying to blend a background with a foreground image where the foreground image is a transparent image with lines on it. I am trying to do it this way. UIGraphicsBeginImageContext CGSizeMake 320..
http://stackoverflow.com/questions/3319805/detecting-call-state-in-ios4 ended if the call was initiated from my app. Or even more than that is there a possibility to detect which app is in foreground I don't believe that this is possible but I had to try... Any info will be appreciated. Thank you. iphone ios4 core telephony..
iPhone - Backgrounding to poll for events http://stackoverflow.com/questions/4656214/iphone-backgrounding-to-poll-for-events handler which starts another long running task etc. Now you only have to check weather the App is getting back to foreground. Then close the bgTask and you're done. Maybe one can do sth. like this inside the expirationHandler from the long running.. expiration handler. This leads into endless execution too. Be aware to terminate the task if your application enters foreground again. And terminate the task if you don't need it anymore. For my own experience I measured something. Using the location..
Is there a way to make drawRect work right NOW? http://stackoverflow.com/questions/4739748/is-there-a-way-to-make-drawrect-work-right-now In a word you can A background the large painting and call to the foreground for UI updates or B arguably controversially there are four 'immediate' methods suggested that do not use a background process... #endif #ifdef BACKGROUNDMETHOD here the painting is being done in the bg we have been called here in the foreground to inval self setNeedsDisplay #endif You can see for yourself which methods work and which do not. you can see the bizarre..
iOS 4.2 - Return to app after phone call http://stackoverflow.com/questions/5028329/ios-4-2-return-to-app-after-phone-call to make the call once the call has ended as far as iOS is concerned phone.app is the current app so that stays in the foreground. There doesn't seem to be anything you can do about this at the moment. It might be worth putting in a feature request to..
didReceiveRemoteNotification when in background http://stackoverflow.com/questions/5056689/didreceiveremotenotification-when-in-background the possible push notification delivery states Your app was just launched Your app was just brought from background to foreground Your app was already running in the foreground You do not get to choose at delivery time what presentation method is used.. Your app was just launched Your app was just brought from background to foreground Your app was already running in the foreground You do not get to choose at delivery time what presentation method is used to present the push notification that is encoded.. was an alert view and message already presented to the user. Only in the case of the app is already running in the foreground do you know that the user did not just launch your app through an alert or regularly from the home screen. You can tell..
Why does viewWillAppear not get called when an app comes back from the background? http://stackoverflow.com/questions/5277940/why-does-viewwillappear-not-get-called-when-an-app-comes-back-from-the-backgroun _sv.frame CGRectMake 0.0 0.0 320.0 self.view.bounds.size.height But it's not being called when the app returns to the foreground. I know that I can implement NSNotificationCenter defaultCenter addObserver self selector @selector statusBarFrameChanged.. the context of what is going on in your own application and not in the context of your application being placed in the foreground when you switch back to it from another app. In other words if someone looks at another application or takes a phone call..
Can you use cancel/isCancelled with GCD/dispatch_async? http://stackoverflow.com/questions/5449469/can-you-use-cancel-iscancelled-with-gcd-dispatch-async it... @interface AstoundingView UIView BOOL pleaseAbandonYourEfforts blah @implementation AstoundingView these are the foreground routines... begin abandon and all done void userHasClickedToBuildASpaceship YourUIStateMachine buildShip self procedurallyBuildEnormousSpaceship.. etc before abandoning the BG process. and then you must do this...... we have finished. it's critical to let the foreground know NOW or else it will sit there for about 4 to 6 seconds on 4.3 4.2 doing nothing until it realises you are done dispatch_sync..
How do I get a background location update every n minutes in my iOS application? http://stackoverflow.com/questions/6347503/how-do-i-get-a-background-location-update-every-n-minutes-in-my-ios-application seems not possible to force it to update the location every n minutes NSTimer Does work when the app is running in the foreground but doesn't seem to be designed for background tasks Local notifications Local notifications can be scheduled every n minutes..
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