dealloc

Trying to get to the bottom of an issue I've been seeing in production builds and FINALLY was able to reproduce it while testing. Using RestKit v0.23.1, when doing an RKManagedObjectRequestOperation using the following code (while plugged into instruments) I get "An Objective-C message was sent to a deallocated 'NSError' object (zombie)" and the app crashes every time there's objects in the response JSON - if the response is something like "objects = ();" there's no crash - so I'm guessing it's somewhere in the RestKit/Core Data mapping or storage? RKManagedObjectRequestOperation

I am working with Automatic Reference Counting. I have a custom UIViewController subclass and whenever I call -presentViewController: animated:completion: or remove its view from the superview I would like to NSLog something like "I am dealloced" so I know that the view controller has successfully been removed. I have implemented the -dealloc method in my view controller. However I started a test project where I just had two UIViewController instances (no retain cycles) and -dealloc is not called either when I push the second UIViewController modally or when I remove the superview or when I

I am doing this : UIImageView *backgroundImage = [[UIImageView alloc] initWithImage:[UIImage imageNamed:@"mainback.jpg"]]; [self.view addSubview:backgroundImage]; NSLog(@" retain count1 : %d " , [backgroundImage retainCount]); [self.view sendSubviewToBack:backgroundImage]; [backgroundImage release]; NSLog(@" retain count2 : %d " , [backgroundImage retainCount]); I got retain count1 : 2 retain count2 : 1 1 ) in dealoc function can i get message like : - (void)dealloc{ NSLog(@" retain count2 : %d " , [backgroundImage retainCount]); [super dealloc]; } And 2) at last i got retain count 1 for

Hello I have this question: I would like to have a vector as class member. This is perhaps my question easier for you and I apologize for that. how should I declare the vector? And is this correct? std::vector<int> *myVector; or std::vector<int> myVector ? how should I handle this vector in dealloc? How can I initialize the array into a if? Is this correct? if(myCondition) { if(!myVector) //is this correct? myVector = new std::vector<int>(); //is this correct? on this i have a error } You most certainly want to use std::vector<int> myVector . No need to initialize it, as it gets automatically

I have a created a small app which uses location services on the iPhone. All works well, except the fact, that sometimes, the small arrow in the info-bar stays active even if I explicitly kill the app. I use the background mode for locationservices, thus the appDelegate methods applicationWillResignActive , applicationDidEnterBackground , applicationWillEnterForeground and applicationDidBecomeActive are implemented but do not touch the location services (well - I need them in background mode). In that configuration applicationWillTerminate is never called; I implemented all the cleanup cleanup

I have a pretty basic question. In some examples I've seen, objects are just released in the dealloc method. In others, the objects are released and then set to nil . Is there a reason for this? Is setting to nil after releasing advantageous? Three ways to dealloc 1. Just release - (void)dealloc { [airplane release]; [super dealloc]; } Now the object reference points to a random position, which may be one of two things: Most likely it is garbage, because the memory position can't be interpreted as an object. Rarely it will be a different object, because memory have been reused to create a new