The NSCoder abstract class declares the interface used by concrete subclasses to transfer objects and other Objective-C/Swift data items between memory and some other format.
Questions tagged [nscoder]
189 questions
7
votes
3 answers
What is the new pattern for releasing self with automatic reference counting?
Using the NSObject method -(id)awakeAfterUsingCoder:(NSCoder *)decoder as an example, the documentation says:
Allows an object, after being decoded, to substitute another object
for itself. For example, an object that represents a font might,…
jamesmoschou
- 1,173
- 8
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6
votes
2 answers
Easy way to do NSCoder enabled class
I have tons of objects which I want to save for offline use.
Currently I use create NSCoder compliant classes for the objects and coded data to file to be available offline.
So in the .h I introduce the objects:
@interface MyClass :…
MapaX
- 98
- 1
- 7
6
votes
2 answers
When does initWithCoder get called?
This will load an array
- (id)initWithCoder:(NSCoder*) coder
{
self = [super initWithCoder: coder];
if (self) {
myArray=[coder decodeObjectForKey:@"myArray"];
}
return self;
}
What is the code that will call this function so…
node ninja
- 31,796
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6
votes
3 answers
Can NSManagedObject conform to NSCoding
I need to transfer a single object across device. Right now I am converting my NSManagedObject to a dictionary , archiving it and sending as NSData. Upon receiving I am unarchiving it. But I would really like to transfer the NSManagedObject itself…
darshansonde
- 491
- 1
- 8
- 13
5
votes
1 answer
NSKeyedArchiver returning nil Swift 4.2
let lessons = Lessons(definition: "testo", photo: url)
SaveUtil.saveLessons(lessons: lessons!)
let x = SaveUtil.loadLessons()
So everything compiles and runs but x is nil....I'm trying to make this ios12/swift 4.2 compliant but no idea what is…
hunterp
- 15,716
- 18
- 63
- 115
5
votes
2 answers
UITableViewCell as UIView from XIB
I have CustomTableViewClass in XIB, adding it to UITableView like
class RestaurantsTableView: UITableView {
override func awakeFromNib() {
self.register(UINib(nibName: "RestaurantTableViewCell", bundle: nil), forCellReuseIdentifier:…
JuicyFruit
- 2,638
- 2
- 18
- 35
5
votes
1 answer
When does encodeWithCoder get called?
This will save an array (I think).
- (void)encodeWithCoder:(NSCoder *)encoder {
[encoder encodeObject:myArray forKey:@"myArray"];
}
Do I have to directly call this method when I want to save an array or do I have to do something else?
node ninja
- 31,796
- 59
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- 254
5
votes
1 answer
May I use NSCoder::encodeInteger:forKey: and decodeIntegerForKey: methods with argument of type NSUInteger?
I need to encode and decode property of type NSUInteger with NSCoder.
Is it safe to use NSCoder::encodeInteger:forKey: and NSCoder::decodeIntegerForKey: methods for that?
The other way around that comes to my mind is to wrap the unsigned integer…
Rasto
- 17,204
- 47
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- 245
4
votes
1 answer
NSCoder - Encoding an Array, with multiple levels of nested arrays
I have a mainObjectArray (NSMutableArray) which is populated with instances of a custom class. Each instance is itself an array, and objects in each array are NSDates, NSStrings, BOOL, and more arrays containing similar objects.
What I haven't been…
Charl
- 85
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- 8
4
votes
1 answer
NSKeyedArchiver encode only part of an array
I have a list of objects that can sometimes change, and I want to keep a persistent cache on the device whenever the app is closed or move to the background.
Most of the objects in the list will not change, so i was wondering what is the best way to…
Adam
- 81
- 1
- 2
4
votes
1 answer
Is there a way to encode and decode the closures?
For some reason, I need to serialize a class object that contains several closure fields.
Like this:
import Foundation
class Foo: NSObject, NSCoding {
var bar: (() -> Void)
override init() {
bar = {}
}
required init(coder…
Aofei Sheng
- 121
- 6
4
votes
2 answers
Save own Class with NSCoder
I'm trying to store some custom class/data to a file in my iPhone/iPad app.
I have a Class RSHighscoreList
@interface RSHighscoreList : NSObject {
NSMutableArray *list;
}
which contains objects of RSHighscore in the list
@interface RSHighscore…
Stef
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4
votes
1 answer
Swift - NSCoder and PHAsset
I have this code:
import Foundation
import Photos
class PostItem: NSObject, NSCoding {
var postDate: String?
var postTitle: String?
var postText: String?
var postImages: [PHAsset]?
func encodeWithCoder(aCoder: NSCoder) {
…
Oleg Shamin
- 81
- 3
4
votes
3 answers
Debuging problems - Values are hidden
I need some ideea about what can be he cause of my problem . I have a source code and i want to make some debug on it , but i can't see the variables.
For example :
NSArray *oldSavedArray = [NSKeyedUnarchiver…
Adina Marin
- 663
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- 15
4
votes
3 answers
Simple Swift class does not compile
My simple class, ClassWithOneArray, produces this error:
Bitcast requires both operands to be pointer or neither %19 =
bitcast i64 %18 to %objc_object*, !dbg !470 LLVM ERROR: Broken
function found, compilation aborted! Command
…
Narwhal
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