nsdictionary

问题 I am observing changes in the rate property of an AVPlayer by calling the following method on it like so: addObserver:sharedPlayerManagerInstance forKeyPath:@"rate" options:NSKeyValueObservingOptionNew|NSKeyValueObservingOptionOld context:0]; The change dictionary I get back from observeValueForKeyPath:ofObject:change:context: is therefore: change = { kind: 1, new: 1, old: 0 } I checked the class of each value, and it turns out to be __NSCFNumber. However, when I try to convert [change

问题 I need to convert this "5?8?519223cef9cee4df999436c5e8f3e96a?EVAL_TIME?60?2013-03-21" string into dictionary. Separated by "?" Dictionary would be some thing like { sometext1 = "5", sometext2 = "8", sometext3 = "519223cef9cee4df999436c5e8f3e96a", sometext4 = "EVAL_TIME", sometext5 = "60", sometext6 = "2013-03-21" } Thank you . 回答1: Break the string to smaller strings and loop for them. This is the way NSArray *objects = [inputString componentsSeparatedByString:@"?"]; NSMutableDictionary *dict

问题 Closed . This question needs details or clarity. It is not currently accepting answers. Want to improve this question? Add details and clarify the problem by editing this post. Closed 6 years ago . Run this code in the debugger and stop afterward (I'm in the iOS 7 simulator in Xcode 5.0.1). NSString *nsStr = @"/Users/123456789012/Library/Application Support/iPhone Simulator/7.0/Applications/94F31827-6DAD-4BD5-AC91-B215176265E1/Documents/libraries/shared/17517_abPub/OEBPS/indexes/Index.sqlite"

问题 i've data from Library that return this: NSDictionary *dict = [NSDictionary dictionaryWithObjectsAndKeys:distanceNumber,@"distance",idChallengerN,@"idChallenger",dateFrom, @"date", nil]; [_array addObject:dict]; If i print _array this is there result: { date = "2015-07-31 14:50:40 +0000"; distance = "-1"; idChallenger = 43; }, { date = "2015-07-31 16:18:57 +0000"; distance = "-1"; idChallenger = "-1"; }, { date = "2015-07-31 16:19:05 +0000"; distance = "-1"; idChallenger = "-1"; }, and it's

问题 I'm using NSDictionary to change the appearance of UIBarButtonItem in the appDelegate file: UIBarButtonItem *barButtonItemProxy = [UIBarButtonItem appearanceWhenContainedIn: [UINavigationBar class], [UINavigationController class], nil]; NSDictionary *textAttributes = @{UITextAttributeFont : [UIFont fontWithName:@"ChocoBold" size:13.0f], UITextAttributeTextColor : [UIColor whiteColor], UITextAttributeTextShadowColor : [UIColor blackColor], UITextAttributeTextShadowOffset : [NSValue

问题 My issue is I am using the table data source from the dictionary. This dictionary contains more than 20 elements in it. I need to search the element present in the dictionary and I need to scroll that element to a visible cell. My issue is I found the element, but it is out of the visible area. I need to scroll that to a visible area. How can I get the index? 回答1: Short answer? Nope. I know the feeling though, which lead me to... Longer answer? Yes-ish? My search a little while back brought

问题 I am developing a quiz app. I take questions from a xml file, parse it and display random questions. These are stored in NSdictionary and NSMutableArray. Also the app plays background music and sound for clicking of buttons(AVAudioPlayer). and vibration( AudioServicesPlaySystemSound(kSystemSoundID_Vibrate)) In one particular function if i try to release the temp variables that I use(I.E NSDictionary and NSMutableArray) the app crashes wen i reach that function for the second time. Hence if i

问题 I am trying to fetch images from photo library within the range of two dates and I am getting the images successfully. And I am also getting the info of the image by using below code. PHContentEditingInputRequestOptions *options = [[PHContentEditingInputRequestOptions alloc] init]; options.networkAccessAllowed = YES; //download asset metadata from iCloud if needed [asset requestContentEditingInputWithOptions:options completionHandler:^(PHContentEditingInput *contentEditingInput, NSDictionary

问题 I have created an Array of Dictionaries : let tempArray = [["id":"1","Name":"ABC"],["id":"2","Name":"qwe"],["id":"3","Name":"rty"],["id":"4","Name":"uio"]] Now I have to create an array of Name only. What I have done is this: var nameArray = [String]() for dataDict in tempArray { nameArray.append(dataDict["Name"]!) } But is there any other efficient way of doing this. 回答1: You can use flatMap (not map ) for this, because flatMap can filter out nil values (case when dict doesn't have value for

问题 I'm using NSSortDescriptor to sort an NSArray of NSDictionary items. Works great, just what I needed... except that I'd like for the dictionary items that have blank values for my sort key to show up at the end of the sorted list. Is there a way to easily accomplish this? Or will I have to create some custom sorting functions? And no, I don't want to just set it to DESC order... I'd like sorted results to look like A, A, B, B, C, blanks, blank. 回答1: Figured this out after seeing another