nscoder

I'm not very experienced in iOS development. While making subclass of AFHTTPSessionManager XCode suggested me to include required init(coder) : import UIKit let _sharedAPIManager = APIManager(baseURL: NSURL(string: API_URL)!) class APIManager: AFHTTPSessionManager { /** * Singleton service * (https://github.com/hpique/SwiftSingleton) */ class var sharedInstance : APIManager { return _sharedAPIManager } init(baseURL url: NSURL!) { super.init(baseURL: url, sessionConfiguration: nil) self.responseSerializer = AFJSONResponseSerializer() as AFJSONResponseSerializer self.requestSerializer =

How do you use NSCoder to encode and decode custom types? For example, how would you use NSCoder with an instance of " STATE " where: typedef enum { ON, OFF } STATE; You can treat them as integers as they are implicitly assigned integer values: - (void) encodeWithCoder: (NSCoder *)coder { ... [coder encodeInt:type forKey:@"state"]; } - (id) initWithCoder: (NSCoder *)coder { ... state = [coder decodeIntForKey:@"state"]; } 来源： https://stackoverflow.com/questions/4029760/nscoder-and-custom-types

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? You don’t call this method directly. It’s called by a NSCoder subclass if it needs to serialize that object. If you want to encode an object graph use the class methods archivedDataWithRootObject: or archiveRootObject:toFile: of NSKeyedArchiver . This in turn will call the encodeWithCoder: method of your objects. Also note that every object in your array has to

So, I'm new to iOS and have been using online tutorials to learn the platform. The tutorials I'm using are building apps with iOS 9 while I'm using iOS 10. Because of that I have run into the title issue. Here is some code: CalendarEvent.swift class CalendarEvent : NSObject { var title : String var dateString : String init(withTitle t : String, andDateString ds : String) { title = t dateString = ds } init(withCoder coder : NSCoder) { dateString = coder.decodeObject(forKey: "dateString") as! String title = coder.decodeObject(forKey: "title") as! String } func encodeWithCoder(coder : NSCoder) {

I am using Xcode 8 and swift 2.3 I want to save the entire view controller to file and restore state even after app closes. I searched everywhere and found we need to use coder for that. but all just shows to save an object. but here I need to save entire ViewContoller and subviews. ViewCotroller will have three buttons Add Text Add Image : User can add any number of textViews and Images. So I need to save all that info also. Add ViewController : User may have an array of this viewController and need to save all. Question 1) Can just save self.view and can it save all subviews automatically ?

I'm going a bit crazy trying to archive and unarchive a UIImageView which has number of subviews which are custom views derived from UIImageView. Here's what I've done: Add a category to the project to allow for the fact that UIImage does not conform to NSCoding: #import "UIImage-NSCoding.h" #define kEncodingKey @"UIImage" @implementation UIImage(NSCoding) - (id)initWithCoder:(NSCoder *)decoder { if ((self = [super init])) { NSData *data = [decoder decodeObjectForKey:kEncodingKey]; self = [self initWithData:data]; } return self; } - (void)encodeWithCoder:(NSCoder *)encoder { NSData *data =