Stop ARC releasing an object while it is idle

Question

I am having a problem with memory management in objective C. Ive been reading through the Advanced Memory Management Programming Guide but I cannot find a solution to my pro

Answer 1

I stumbled upon this case several times when working with UITableViews. I created a private @property (strong) id *yourObjectRetain and assigned my object to it. An array for multiple objects will also work.

Answer 2

Your controller is getting dealloc'ed when the detailViewController is dealloc'ed. Hence, you must move the handle of your controller and define in it the any of the following :

1. MasterViewController or your application's RootViewController OR
2. AppDelegate OR
3. Create a singleton as answered by "trojanfoe"

Answer 3

Use a singleton pattern so that Controller looks after its own lifetime and exists app-wide. This shared instance will exist from when it's first requested until the app terminates and ARC will not release it arbitrarily.

Controller.h:

@interface Controller : NSObject

+ (Controller *)sharedInstance;

@end

Controller.m:

#import "Controller.h"

static Controller *_instance = nil;
static dispatch_once_t _onceToken = 0;

@implementation Controller

+ (Controller *)sharedInstance {
    dispatch_once(&_onceToken, ^{
        _instance = [[Controller alloc] init];
    });
    return _instance;
}

// You could add this if you want to explicitly destroy the instance:
+ (void)destroy {
    _instance = nil;
    _onceToken = 0;
}