nsdictionary

问题 { “QuizId” : “23566656” “StartTime”:”23:30” “EndTime”:”23:45” “data”:[ {“QuestionID”:”131313131”,“AnswerID”:“1233152”}, {“QuestionID”:”131313141”,“AnswerID”:“1233152”}, {“QuestionID”:”131313151”,“AnswerID”:“1233152”}, {“QuestionID”:”131313161”,“AnswerID”:“1233152”}, {“QuestionID”:”131313171”,“AnswerID”:“1233152”}, {“QuestionID”:”131313181”,“AnswerID”:“1233152”}, {“QuestionID”:”131313191”,“AnswerID”:“1233152”}, {“QuestionID”:”131313101”,“AnswerID”:“1233152”}, ] } Hello I want to Create a

问题 This question already has answers here : Grouping NSArray of NSDictionary based on a key in NSDictionay (2 answers) Closed 5 years ago . I have a NSDictionary and i want to group it creating an array of objects by date Example of the main NSDictionary: ({ date = "2014-04-27"; group = "yellow.png"; length = 180; }, { date = "2014-04-28"; group = "blue.png"; length = 180; }, { date = "2014-04-27"; group = "blue.png"; length = 120; }) I want to group something similar as: 2014-04-27 = ( { date =

问题 Okay so I have been working through an example that closely matches what I am trying to achive, the sole difference being that in the example he is directly calling from his database the data he needs to be sectioned etc. Where as I already have a sorted NSArray. This is the tutorial I am working off - iPhone Development: Creating Native Contacts like screen I have created a Method that is capturing each entry in the NSArray and putting these results into a alpha based NSDictionary (so their

问题 I am new to Swift Programming Language. I am trying to make a UIPickerView which work like select or listbox that contain key,value.If user select one from picker view,it gives me the key of that value. I have been browsing for almost half of the day trying to figure this out. All i got was UIPickerView using array results.All i want to know was how to store a Dictionary[key:value] in UIPickerView and if user select one of the value from picker,how to get the key. Please Help. With Regards 来源

问题 I've been trying to save a plist of a NSDictionary to my app's Documents folder. I haven't tried this on the device yet but I'd like it to work on the simulator for testing purposes. The [self createDictionaryFromChoreList] method just creates a NSDictionary from some data in another class of mine. I've pretty much copied/pasted this code from the web documents and when I go to see if the file was saved or not, I find that it isn't. Here is the method block. NSArray *paths =

问题 I want to use the following method to save NSDictionary + (void)writeDicToFile:(NSDictionary *)dic fileName:(NSString *)fileName { NSString *filePath = [NSTemporaryDirectory() stringByAppendingPathComponent:fileName]; [dic writeToFile:filePath atomically:YES]; } But for some dictionary it works and for some complex dictionary it doesn't work. help me! 回答1: In order for NSDictionary to be successfully saved all the objects it holds have to conform to NSCoding protocol. In short that means that

问题 When I was using an NSArray, it was easy: NSArray *array = ... lastIndex = INT_MAX; ... int randomIndex; do { randomIndex = RANDOM_INT(0, [array count] - 1); } while (randomIndex == lastIndex); NSLog(@"%@", [array objectAtIndex:randomIndex]); lastIndex = randomIndex; I need to keep track of the lastIndex because I want the feeling of randomness. That is, I don't want to get the same element twice in a row. So it shouldn't be "true" randomness. From what I can tell, NSDictionary doesn't have

问题 I'm new in Swift and I have a problem with filtering NULL values from JSON file and setting it into Dictionary. I getting JSON response from the server with null values and it crashes my app. Here is JSON response: "FirstName": "Anvar", "LastName": "Azizov", "Website": null, "About": null, I will be very appreciated for help to deal with it. UPD1: At this moment I decided to do it in a next way: if let jsonResult = responseObject as? [String: AnyObject] { var jsonCleanDictionary = [String:

问题 I have a dictionary that I retrieve from a JSON request and I would like to populate a table with those values. I think everything is okay, however I am getting an error in the class declaration that Type SubjectsViewController does not conform to protocol 'UITableViewDataSource' I am using a storyboard, and I added the table view on the UI to datasource and delegate and as far as I know, I am implementing the functions correctly. I have added the relevant parts of my code below. It may be

问题 I have a dictionary i want to iterate it in ordered form as the objects are in the dictionary, but after iterating it is iterating in random order. Please help Thanks in advance. 回答1: You can't sort a dictionary but you can sort its keys as follow: let myDict: [String:String] = ["car":"blue", "watch":"black", "bike": "red"] for key in myDict.keys.array.sorted(<) { let value = myDict[key]! println("\(key) = \(value)") } let dashboardItemsTuples : [(String , String)] = [("All Cards" , "cards" )