ios background task timer

iOS application continued background timeCategory:iOS development related(877) (0)Because of Apple's background mechanism, when we press the home button, all threads including the main thread of the task will be suspended, some resources such as the socket will be collected by the system, will cause a lot of problems,

layer, we actually have 0, 1, 2 in the sub-view array. The allocation order also changes synchronously, this is known when using Exchangesubviewatindex, because it is directly the order of the array of exchanges, you can check Nsarray by the following methods: Subview2=self.view.subviewS UIView *view11=[subview2 Objectatindex:5]; View11.backgroundcolor=[uicolor Purplecolor]; [Super Viewdidload]; Do any additional setup after loading the view, typically from a nib.} We want to change th

Based on the screen size. In addition, you should pay attention to the use at the right time.TransitionCoordinatorOf-AnimateAlongsideTransition:To make the switch more natural. Multi-task brings the possibility of multiple apps running on the same platform, so your apps will certainly be running together with other apps. When developing a mobile application, you must never forget the limitations of the device platform. Compared with desktop devices,

] endBackgroundTask:self.backgroundTaskIdentifier];Strongself.backgroundtaskidentifier = Uibackgroundtaskinvalid; }}); }At the end of a long mission, we need to do something to clean up:1. End all threads and timers, whether they are created in the base timer or GCD.2. Call UIApplication's Endbackgroundtask: method to end the background task.3. Set the

Because the iOS system is "pseudo background" mode, when the home button is pressed, such as the program does not do anything, the application will have 5 seconds of execution buffer time, the random program is suspended, all the task terminal, including timer and location update operation, but the program open

IOS background running WenyiI learned from the apple documentation that a general application can get a certain amount of time to run related tasks when entering the background, that is, it can run a short period of time in the background. Three other types can be run after, 1. Music 2. location 3. voip Article 2 Ex

Directory (?) [-] Status of the application The life cycle of an application 1 loading applications into the foreground 2 loading applications into the background 3 about the main function Response interruption 1 when an alert-based interrupt occurs, such as when a call comes in, this is the program that temporarily enters the inactive state. This user can choose how to handle this interrupt process

-sensitive background tasks). When the program returns to the active state,applicationDidBecomeActive:The method should start again with the tasks mentioned above, such as restarting the timer, continuing to distribute the queue, and increasing the frame rate of OpenGL es. However, the game will go back to a paused state and not start automatically. 4, go to the ba