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About memory management in Objective-C or iOS


About memory management in Objective-C or iOS

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About memory management in Objective-C or iOS
Tag : ios , By : Dmitry
Date : December 01 2020, 05:00 PM

Hope this helps ARC - Automatic Reference Counting was introduced since iOS4. And currently ARC is the most common and the best practice for iOS development.
MRC - Manual Reference Counting is where you have to DIY.

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Objective-C memory management: how do you release the memory when you return an allocated instance?


Tag : objective-c , By : user186831
Date : March 29 2020, 07:55 AM
around this issue How do you release the memory in this situation? Do you have to? , With autorelease
- (NSString *) whatHappensHere {
 NSMutableString * mutableString = [[NSMutableString alloc] initWithString:@"Hello"];

[mutableString autorelease];
 return mutableString;
}

objective-c memory management


Tag : objective-c , By : jonagh
Date : March 29 2020, 07:55 AM
With these it helps The most important thing to take away here: The assignment operator = never mutates (i.e. changes) an object. Mutating an object can only be accomplished by sending it messages (e.g., sending appendString: to an NSMutableString). The assignment operator simply causes a pointer to point to a different object than it did before.
Thus, it is incorrect to say:
(1) NSString * test = [[NSString alloc] init];
(2) test = @"msg";

Objective-C memory leak, memory management question


Tag : objective-c , By : CrimsonGore
Date : March 29 2020, 07:55 AM
around this issue The first rule to remember when you're dealing with memory management in Objective-C is that you're responsible for anything that you (1) allocate (using alloc), (2) new up (using new), (3) copy (using copy), or (4) retain (using retain). In those four cases, you must explicitly release (or autorelease) those references.
In your example, since you allocated recipeView, you must release it once it's added to the navigation controller.
RecipeView * recipeView = [[RecipeView alloc] initWithNibName:@"RecipeView" bundle:nil];
[self.navigationController pushViewController:recipeView animated:YES];
[recipeView release];

How does memory management system of Objective C effects C++ objects embedded in interfaces of Objective C


Tag : objective-c , By : Heals1ic
Date : March 29 2020, 07:55 AM
seems to work fine If it's not a pointer, then the C++ object will form part of the Objective-C object itself. So if the C++ object is 12 bytes then when you alloc the Objective-C object, 12 bytes of that object are reserved for the C++ object. So, whenever the Objective-C object is deallocated, those bytes that the C++ object is held in are destroyed along with the Objective-C object.
It's no different to have any instance variables in an Objective-C object.

objective-c memory management


Tag : objective-c , By : Al Dimond
Date : March 29 2020, 07:55 AM
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