nsdictionary

Is there a reason for NSDictionary to return its keys as NSArray instead of NSSet ? The documentation already states that the order of the keys in the array is undefined, it would sound logical to use a set. Sets tend to be somewhat neglected in API design. They'll be included most of the time, but usually long after all the other standard data structures. Add on top of that the fact that besides the very recent NSFastEnumeration, there is no general collection or sequence protocol in Objective-C — every collection class is completely independent of all the others — and it becomes very hard to

I'm trying to use a class as a key in an NSDictionary . I looked at the answer to this question and what I have is pretty much the same; I'm using setObject: forKey: . However, XCode complains, saying Incompatible pointer types sending 'Class' to parameter of type 'id<NSCopying>' . The call I have is: [_bugTypeToSerializerDictionary setObject: bugToStringSerializer forKey: [bugToStringSerializer serializedObjectType]]; bugToStringSerializer is an instance of BugToStringSerializer whose concrete implementations implement serializedObjectType . An example of a concrete implementation looks like

I want to check if an NSDictionary is empty. I am doing it like this. mutDictValues = [[[NSUserDefaults standardUserDefaults] objectForKey:@"dicValues"]mutableCopy]; NSLog(@"dictValues are %@",mutDictValues); if(mutDictValues == NULL){ arrCities = [[NSMutableArray alloc]init]; NSLog(@"no cities seleceted"); }else{ arrCities = [[NSMutableArray alloc]init]; arrCities = [mutDictValues objectForKey:@"cities"]; [self placeCities]; } But it alwasy crashes on this line arrCities = [mutDictValues objectForKey:@"cities"]; with the following error: -[__NSCFConstantString objectForKey:]: Can someone help

I want to have a NSDictionary that maps from UIView s to something else. However, since UIViews do not implement the NSCopying protocol, I can't use them directly as dictionary keys. You can use an NSValue holding the pointer to the UIView and use this as key. NSValues are copyable. but, if the view is destroyed, the NSValue will hold a junk pointer. Rok Strniša Here is the actual code (based on the answer by luvieere and further suggestion by Yar): // create dictionary NSMutableDictionary* dict = [NSMutableDictionary new]; // set value UIView* view = [UILabel new]; dict[[NSValue

I have an NSDictionary received from a json request that looks like this: RESULT : ( { Id1 = 138; lat = "45.5292910"; long = "-73.6241500"; order = "2343YY3" }, { Id1 = 137; lat = "45.5292910"; long = "-73.6241500"; order = "2343YY3" }, etc. I want to display it in a TableView (CellforRowAtIndexPath), so I obtain the data as NSArray. The method seems inefficient as each key Id1 , lat , long , etc is created as an NSArray so that I can display them each with: [self.data1 objectAtIndex:indexPath.row]; [self.data2 objectAtIndex:indexPath.row] , etc. How can I achieve the same thing without

可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效，请关闭广告屏蔽插件后再试): 问题: I'm using an API service of a web service and it is written in their description that they send JSON data wich also matches in my opinion with the response I get from it. Here a part of it which I got from the NSURLConnection-Delegate (connection didReceiveData: (NSData *) data) and converted in a NSString using: NSLog(@"response: %@", [[NSString alloc] initWithData:data encoding:NSUTF8StringEncoding]); Here the snippet: {"scans": { "Engine1“: { "detected": false, "version": "1.3.0.4959", "result": null, "update": "20140521" }, "Engine2“: {

可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效，请关闭广告屏蔽插件后再试): 问题: I have been using following SDK to perform integration of LinkedIn into iOS and sharing post from iDevices. SDK is available here: https://github.com/jeyben/IOSLinkedInAPI In this code I can't find proper example code but however I had written some code through which post can be shared. Here is my code: In the code I have only single viewcontroller in which I have taken only two buttons, 1) Linked In Account [This button is used to present login controller and gets user successfully logged into the account] 2) Share [Allows user to share