All Questions
Tagged with memory-management ios
2,561 questions
1
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1
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40
views
Why is a CALayer retained after I stop referencing it?
I've the impression that my CALayer is retained after being added as a sublayer until the end execution block, instead of until I stop referencing it.
The parent UIView is however released as soon as ...
- 10.5k
1
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0
answers
27
views
Memory allocation in swift [duplicate]
In swift, based on Apple's documentation reference types are stored on heap and value types on stack, but if a class definition has a struct variable for example String, where will that be stored?
...
2
votes
2
answers
117
views
EXC_BREAKPOINT on NSFetchedResultsController.performFetch() because of -[CFString isNSString__]: message sent to deallocated instance
I'm running into a repeatable crash when calling -performFetch on my NSFetchedResultsController in what SEEMS like a data-related crash:
NSFetchedResultsController *aFetchedResultsController =
...
- 21.9k
2
votes
0
answers
588
views
Memory issues on iOS
I'm currently working on optimizing my app.
When I'm monitoring the app's memory in DevTool it's showing around 20MB of memory usage.
However, when I'm running the same app via XCode, it's showing ...
- 413
2
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0
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348
views
google_maps_flutter - Map is using all available memory
I'm currently porting a native iOS to Flutter.
I noticed that my widget containing the map is consuming a lot of memory over 500 MB.
Compared to my native iOS app, it's using x5 more memory.
I don't ...
- 413
2
votes
2
answers
1k
views
Swift Memory Leaks with UIDiffableDataSource, CFString, Malloc Blocks, and others
I've been writing an application for a couple months now and just started checking for memory leaks - it turns out I have a lot of them - 25 unique types (purple exclamation point) and over 500 total ...
2
votes
1
answer
228
views
FileHandle don't free memory in iOS
I'll send large file to server. The file will be separated to chunks. I receive high memory consumption when I call FileHandle.readData(ofLength:). Memory for chunk don't deallocate, and after some ...
0
votes
1
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91
views
iOS Swift: NSMutableString vs [Character] which is better for known size?
I'm doing some text processing, involving converting a number of characters into strings. Input is a long sequence of Character and output is a number of strings created from the Character sequence ...
- 5,351
4
votes
2
answers
1k
views
Could a guard let `self` = self inside a closure that uses [weak self] cause a crash if the object they reference becomes deallocated?
I've looked at some comments to questions on stackoverflow about using [weak self] and [unowned self]. I need to be sure I understand correctly.
I am using the latest Xcode - Xcode 13.4, the latest ...
- 994
0
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1
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223
views
When static object auto release in singleton pattern in iOS?
I have a question about singleton using static memory.
I usually use this pattern to hold my temporary data in my APP.
When I leave the APP for a long time, is it possible that the singletion memory ...
- 595
-1
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1
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59
views
Does closure create a strong reference to an object that is created inside closure scope?
In this example, will vm and targetVC get deinitialized? will it cause a memory leak?
loginModule.checkbox.checkboxAction = { [unowned self] in
let vm = HomeViewModel()
let targetVC = ...
1
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1
answer
2k
views
Do we need to explicitly use capture list for weak variables in swift closure?
My understanding for closure was, it will capture all directly referenced objects strongly irrespective of whether the object variable was declared weak or strong outside the closure and, if we want ...
- 4,490
1
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0
answers
472
views
Remove UIViewController from UIView and release memory
I'm adding UIViewController in another UIView using:
self.addChild(vc)
self.view.addSubview(vc.view)
vc.didMove(toParent: self)
and removing that UIViewController by:
for childVC in self.children {
...
- 395
0
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1
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787
views
Memory Problem with specific ViewController in Swift 5
I need some help with this problem.
I have this basic Scheme
HomeController
TripNavigation (view controller parent)
Step1 (view controller child)
Step2 (view controller child)
When i tap 10 times ...
- 73
0
votes
3
answers
863
views
How to reduce MSAA memory usage?
Here is working on rendering with OpenGL ES on iOS. To get a better image quality, we adopt MSAA, ie. Multisample anti-aliasing, which use 4 times larger FBO.
For example, with 1080P resolution, a ...
- 1,824