nsobject

Possible Duplicate: isMemberOfClass returns no when ViewController is instantiated from UIStoryboard I recently stumbled over a weird problem: I was implementing simple Testcases and using the NSObject isMemberOfClass method to check for class equality. Additionally I implemented a custom init: -(id)initWithMessage:(NSString *)message If I replace id with the right class name the isMemberOfClass will return 'YES'. Otherwise it will fail. The interesting part is: The class Method will return the right Class every time. Is this a bug? Or is it supposed to work that way? Thanks.. EDIT: Ok this

I have a model object called Hashtag. This simply contains a optional String variable called hashtagName. I fetch the data from my Firebase Database and append the hashtags to my fashionHashtags, which is a [Hashtag] . The issue I have is that I want to append that to my other categoriesArray by using the insertElementAtIndexPath function. I cannot do this as it wants an array of Strings and not an array of Hashtag. When I autocorrect it, it replaces it with fashionHashtags as! [String] but that creates another error. How do I fix this so it allows me to do so? I would like to stick to the

I have a ViewController declared as: @interface DownloadViewController : UIViewController <UITableViewDataSource, UITableViewDelegate> and I want to use NSURLConnection to download files. NSURLConnection simply "doesn't start", the delegate methods don't work (for example connection:didReceiveResponse is never called) . I noticed in some sample code that the class was subclassing NSObject instead of UIViewController . How do I combine it? I want to use ViewController methods but then I can't use NSURLConnection . It's not so easy to find a fully explained example how to download file with

I'm trying to extract the badge value out of the userInfo dictionary of a remote notification. I read many post and found a solution of my problem but I'm highly not satisfied! So here is my data structure (I removed the useless lines): { aps = { badge = 7 } } To extract this number '7' out of my userInfo I would like to do the following: self.updateAppIcon(userInfo["aps"]["badge"] as? Int) But of course I get the following error : Swift : '(NSObject, AnyObject)' does not have a member named 'subscript' If I'm not wrong, it's because [] returns an AnyObject which cannot be interpreted as

This question already has an answer here: Why use id when we can just use NSObject? 4 answers Is there a difference between relating to an Object in a 'Polymorphic' way with the type id than as NSObject * ? In what way is: NSString* aString = @"Hello"; id anObj = aString; different than: NSString* aString = @"Hello"; NSObject* anObj = aString; id is a special keyword used in Objective-C to mean “some kind of object.” It does not contain isa pointer( isa , gives the object access to its class and, through the class, to all the classes it inherits from), So you lose compile-time information

In the vein of... @implementation MyClass - (id) objectForKeyedSubscript:(id)k { return [self something:k]; } Is it also possible to "subscript" Class objects? I too, am about to find out, with you.. but thought I would post this question as I tested it out, myself... + (id) objectForKeyedSubscript:(id)k { return [self.shared something:k]; } And alas.. it is not... id x = MyClass[@"document"]; error: unexpected interface name 'MyClass': expected expression But why, Daddy? Class ' sure get the short end of NSObject 's stick, if you ask me . Alex Gray Josh Caswell's comment pointed out the

I would like to take the GCD approach of using shared instances to the next step so I created the following code: @implementation MyClass static id sharedInstance; #pragma mark Initialization + (instancetype)sharedInstance { static dispatch_once_t once; dispatch_once(&once, ^{ sharedInstance = [[self alloc] init]; }); return sharedInstance; } - (instancetype)init { if (sharedInstance) { return sharedInstance; } @synchronized(self) { self = [super init]; if (self) { sharedInstance = self; } return self; } } @end I assume the sharedInstance method seems to be ok but I am unsure about the init