Strong references are regular references that are protected from garbage collection, in contrast to weak references.
Strong references are regular references that are protected from garbage collection, in contrast to weak-references.
Questions tagged [strong-references]
86 questions
0
votes
2 answers
iOS dismissing a view controller doesn't release memory
I know it's all with the weak strong reference when presenting the viewController in the parent view ... correct me please if I'm wrong
this is an example how I do it
let viewHolder = viewClass()
func presentView() {
self.present(viewHolder,…
Jacob Kazal
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GCD keeps strong reference to 'self' even when defining a capture list
class MyClass {
var someProperty = 0
deinit {
// never gets called
}
func doSomething() {
DispatchQueue.global().async { [weak self] in
Thread.sleep(forTimeInterval: 3600)
self?.someProperty…
bcause
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Converting a strong reference to weak reference to self
How do you convert this to a weak reference to self?
NSNotificationCenter.defaultCenter().addObserver(self, selector: #selector(MyViewController.handleMessage(_:)), name: "NewMessage", object:…
Prabhu
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3 answers
Will a strong reference to a subview in a dictionary cause a reference cycle?
I have a view with variable subviews, the subviews are set up using a enum describing the type of this subview. My question is if the following would cause a strong reference cycle or if there is a better way to do this:
class ControlBar: UIView {
…
twiz_
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UIViewController loop strong reference doesn't prevent dealloc
I am using ARC.
The case of study here inculdes a custom UITabBarController and one of its UIViewControllers.
The Tabbar have a strong reference to an Object of some class. That object also have a strong reference to the Tabbar itself which caused…
hasan
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0
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1 answer
C++ - How to break when the number of references to a shared pointer change?
In Microsoft Visual C++ 2015, how can I set a "Data Breakpoint" on a Boost shared pointer so that the debugger breaks whenever the number of strong and/or weak references changes?
Pietro
- 12,086
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2 answers
How is a strong retain cycle possible with async or static calls?
I am trying to grasp how I can recognize when a strong retain cycle is possible and requires me to use [weak/unowned self]. I've been burned by unnecessarily using [weak/unowned self] and the self was deallocated immediately before giving me a…
TruMan1
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Is there a way to turn a weak reference into a strong one?
I have an object that is set as the delegate of another object, whose delegate property is weak.
- (YYService *)service
{
XXHandler *handler = [[XXHandler alloc] init];
// YYService's "delegate" property is weak
return [[YYService alloc]…
ide
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0
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1 answer
when strong reference directly access weak reference
In Java, when an target object A is only reached by weak reference B, A can be GC.
what happen if the weak reference B is reached by a strong reference C at same time? For exmaple, C points to a class instance which contains a field of weak…
jetstream
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2 answers
When to create an outlet of strong type?
When we create an outlet its property is directly set to a weak type. However weak type contains on optional value. I want outlet created to be of strong type so that it always contains a value. But there is memory management issues and can form…
user4790024
0
votes
1 answer
break strong reference cycle between Managed Object and Collectionview Cell
Update :
Had nothing to do with Core Data or the CollectionView. I never dismissed the ViewController holding the CollectionView. More in the answer below!
I am having a memory leak in Swift iOS. First I thought it was located in my fetch function,…
R Menke
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0
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0 answers
Are Action and Func passed as strong references?
I have a Register Callback method on a Game class that objects can register a callback with for when the game is shutting down.
public void RegisterAsyncShutdownCallback(Func callback)
{
if (this.asyncShutdownCallbacks.Contains(callback))
…
Johnathon Sullinger
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2 answers
pushed ViewController won't dealloc. which strong reference holds it?
I have a ViewController like below;
All of the delegates are weak, what else can it be a strong reference then ?
I can't get it, and the ViewController won't dealloc that is really bad.
anna
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Objective-C++ and objects retaining
Consider this code example:
class SomeArbitrarilyNamedClassPlusPlus {
public:
SomeArbitrarilyNamedClassPlusPlus(NSObject *object) { object_ = object; }
SomeArbitrarilyNamedClassPlusPlus() { object_ = nil; }
private:
NSObject…
peetonn
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0
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2 answers
IOS about weak and strong, what's the result should be? and constant declare
there are two properties like below
#import
@interface Contact : NSObject
@property(nonatomic, strong)NSDate *birthDay;
@property(nonatomic, weak)NSDate *birthDay1;
- (void)testWeakProperty;
@end
on implementation…
maple
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