2014/10/15 下午 10:11:04

iphone Programming Glossary: lifetime

http://stackoverflow.com/questions/1230858/iphone-core-data-crashing-on-save

YES you may have introduced a memory management issue as you are setting the managed object's lifetime to be dependent on the lifetime of the managed object context. If you're passing your context around throughout your app.. may have introduced a memory management issue as you are setting the managed object's lifetime to be dependent on the lifetime of the managed object context. If you're passing your context around throughout your app this could get rather large if..

Is it better to autorelease or release right after?

http://stackoverflow.com/questions/1283324/is-it-better-to-autorelease-or-release-right-after

will get released either way. The biggest benefit of using autorelease is that you don't have to worry about the lifetime of the object in the context of your method. So if you decide later that you want to do something with an object several..

Objective-C 101 (retain vs assign) NSString

http://stackoverflow.com/questions/1380338/objective-c-101-retain-vs-assign-nsstring

There's no such thing as the scope of an object in Objective C. Scope rules have nothing to do with an object's lifetime the retain count is everything. You usually need to claim ownership of your instance variables. See the Objective C memory..

Is calling [self release] allowed to control object lifetime?

http://stackoverflow.com/questions/1385433/is-calling-self-release-allowed-to-control-object-lifetime

calling self release allowed to control object lifetime I want to create an object in Objective C but I don't hold a reference to it. Is it allowed to let the object control its.. to create an object in Objective C but I don't hold a reference to it. Is it allowed to let the object control its own lifetime by calling self release In case you're wondering why I need this I want to create an object that subscribes to some notifications..

removeObserver with NSNotification… what am I doing wrong?

http://stackoverflow.com/questions/3328210/removeobserver-with-nsnotification-what-am-i-doing-wrong

automatically happen after the view controller is dismissed there can still be some life left in the view controller's lifetime. In that timeframe that view controller is still subscribed for that notification. If you remove the observer in viewWillDisappear..

Singleton shared data source in Objective-C

http://stackoverflow.com/questions/355449/singleton-shared-data-source-in-objective-c

them. They're getting deallocated and their memory is being used up by other objects later on in your application's lifetime. Either retain your objects that you're creating there or use the non convenience methods to generate them. searchDict NSDictionary..

Best way to switch between UISplitViewController and other view controllers?

http://stackoverflow.com/questions/4213097/best-way-to-switch-between-uisplitviewcontroller-and-other-view-controllers

app i.e. its view should be added as the subview of UIWindow b if used UISplitViewController should be there for the lifetime of the app i.e. don't remove its view from UIWindow and put another in place or vice versa Having read around and experimented..

Understanding when to call retain on an object?

http://stackoverflow.com/questions/4450644/understanding-when-to-call-retain-on-an-object

a method a method that returns an object that you don't own Because you don't own it you have no control over it's lifetime. It could be released while you are still relying on it being a valid object. you work with that object Never sure that.. cases you can assume that you have been passed an autoreleased object. That means that you have no control over it's lifetime. To make sure that it doesn't get released before you are done with it you call retain on the object. You now own this object..

Repeating NSTimer, weak reference, owning reference or iVar?

http://stackoverflow.com/questions/4945028/repeating-nstimer-weak-reference-owning-reference-or-ivar

breaker is what the target of the timer is If the object that creates a timer is its target managing that object's lifetime becomes more fragile it cannot simply be retain release managed instead you need to ensure that the client that holds the..

Can somebody explain the process of a UIViewController birth (which method follows which)?

http://stackoverflow.com/questions/5107604/can-somebody-explain-the-process-of-a-uiviewcontroller-birth-which-method-follo

program depending on how you initialize your UI. The view may also be destroyed and reloaded several times during the lifetime of your program agan depending on how you manage your UI. When the viewController has identified that its view is required.. the next call to view will trigger the loading process again. The view may also be unloaded at any time during the lifetime of your program simply by setting the view property to nil . The default implementation of didReceiveMemoryWarning will.. especially during animated transistions from one view to another. These methods may be called many times during the lifetime of your program as views are swapped in and out in your navigation scheme. 4. View layout The layoutSubviews method is not..

What are the Dangers of Method Swizzling in Objective C?

http://stackoverflow.com/questions/5339276/what-are-the-dangers-of-method-swizzling-in-objective-c

you simply want to replace the implementation of a method and you want that implementation to be used for the entire lifetime of your program. This means that you should do your method swizzling in void load . The load class method is executed serially..

Difference between [NSMutableArray array] vs [[NSMutableArray alloc] init]

http://stackoverflow.com/questions/5423211/difference-between-nsmutablearray-array-vs-nsmutablearray-alloc-init

object and calling alloc followed by release Apple wants you to use alloc and release because this keeps the lifetime of the object short and under your control. The problem here is that autoreleased objects live in the autorelease pool and..

Core Data Store included in App Bundle

http://stackoverflow.com/questions/5633079/core-data-store-included-in-app-bundle

in my xcode project At launch time my app parses a XML project resource to fill the Core Data Store SQLLite During lifetime of my app I add remove update data of that Store Now I want to stop doing that heavy XML parsing process on device and directly..

Version vs build in XCode 4

http://stackoverflow.com/questions/6851660/version-vs-build-in-xcode-4

fixes Then the Build is used separately to indicate the total number of builds for a release or for the entire product lifetime. Many developers start the Build number at 0 and every time they build they increase the number by one increasing forever...

Interface Builder (XIB) or Code when merging in a team environment?

http://stackoverflow.com/questions/7456881/interface-builder-xib-or-code-when-merging-in-a-team-environment

on things like The people involved the complexity of the UI the quality of the implementation you need. the expected lifetime of the implementation But yes it has been and it often is when the case is just not trivial Otherwise you just fight it..

Moving a Stick figure, anchorpoints, animation, or something else…?

http://stackoverflow.com/questions/7808981/moving-a-stick-figure-anchorpoints-animation-or-something-else

Don't start doing this during the production phase or you'll end up in anchorPoint tweaking hell throughout the lifetime of your project. Don't go there In summary Modify anchorPoint only if that makes it easier to align nodes with other nodes..