nsarray

问题 Currently I'm populating my tableviewcells with the contents of multiple arrays representing a name, id, etc. My question comes when I start to use the search display controller. I have an array with a list of names, a list of IDs, a list of barcodes, and a list of Aliases. When the user types in the search bar I need to be able to search all 4 arrays. When it finds the result in 1 array it has to pair the result with the 3 other arrays.. Example Names (apple,carrot,banana, dog) alias (red,

问题 I have an array with french strings let say: "égrener" and "exact" I would like to sort it such as égrener is the first. When I do: NSSortDescriptor *descriptor = [[NSSortDescriptor alloc] initWithKey:@"name" ascending:YES]; NSArray *sortDescriptors = [NSArray arrayWithObject:descriptor]; NSArray *sortedArray = [myArray sortedArrayUsingDescriptors:sortDescriptors]; I get the é at the end of the list... What should I do? Thanks 回答1: There’s a convenience method in NSString that lets you do

问题 I have an array with french strings let say: "égrener" and "exact" I would like to sort it such as égrener is the first. When I do: NSSortDescriptor *descriptor = [[NSSortDescriptor alloc] initWithKey:@"name" ascending:YES]; NSArray *sortDescriptors = [NSArray arrayWithObject:descriptor]; NSArray *sortedArray = [myArray sortedArrayUsingDescriptors:sortDescriptors]; I get the é at the end of the list... What should I do? Thanks 回答1: There’s a convenience method in NSString that lets you do

问题 I have an array with french strings let say: "égrener" and "exact" I would like to sort it such as égrener is the first. When I do: NSSortDescriptor *descriptor = [[NSSortDescriptor alloc] initWithKey:@"name" ascending:YES]; NSArray *sortDescriptors = [NSArray arrayWithObject:descriptor]; NSArray *sortedArray = [myArray sortedArrayUsingDescriptors:sortDescriptors]; I get the é at the end of the list... What should I do? Thanks 回答1: There’s a convenience method in NSString that lets you do

问题 Having enum {MyA, MyB, Null}; typedef NSNumber myEnum; Or typedef enum {MyA, MyB, Null} myEnum; 1) How do I create an array myEnum* myEnumTemp[] = {MyA, MyB}; Just gives "Implicit conversion of 'int' to NSNumber* is disallowed with ARC(ref. counting) 2) If you are able to create an array how to convert it to NSArray ? 回答1: Try to do it this way : typedef enum { MyA, MyB, Null } myEnum; Then, to create an array, wrap the numbers into NSNumber s objects : NSArray *a = [NSArray arrayWithObjects:

问题 I've got a text file, with about 200,000 lines. Each line represents an object with multiple properties. I only search through one of the properties (the unique ID) of the objects. If the unique ID I'm looking for is the same as the current object's unique ID, I'm gonna read the rest of the object's values. Right now, each time I search for an object, I just read the whole text file line by line, create an object for each line and see if it's the object I'm looking for - which is basically

问题 I've got a text file, with about 200,000 lines. Each line represents an object with multiple properties. I only search through one of the properties (the unique ID) of the objects. If the unique ID I'm looking for is the same as the current object's unique ID, I'm gonna read the rest of the object's values. Right now, each time I search for an object, I just read the whole text file line by line, create an object for each line and see if it's the object I'm looking for - which is basically

问题 I've got a text file, with about 200,000 lines. Each line represents an object with multiple properties. I only search through one of the properties (the unique ID) of the objects. If the unique ID I'm looking for is the same as the current object's unique ID, I'm gonna read the rest of the object's values. Right now, each time I search for an object, I just read the whole text file line by line, create an object for each line and see if it's the object I'm looking for - which is basically

问题 (hmm.. long title) If I start out with an NSArray of custom objects (each object is a Person) like this: { surname:Allen forename: Woody, surname:Baxter forename: Stanley, surname:Clay forename: Cassius } ..etc.. You can see that the array is already in surname order. How do I use that array to create a a UITableView with a section headers A, B C etc, as well as an index thing on the side running vertically A B C EDIT I guess what I'm asking is how to turn my array of objects into a Section

问题 I used this answer to sort 2 objects by date, and it worked perfectly : Get one NSArray I now need to sort 3 objects by date, and can't quite modify what I have to get that right . All of the Articles from the API/RSS feeds will be sorted by date in 1 tableView . Here's what I tried: - (void)sortCombinedModel { // All 3 [self.combinedModel sortUsingComparator:^NSComparisonResult(id a, id b, id c) { NSDate *dateA, *dateB, *dateC; dateA = ([a isKindOfClass:[FeedRSS self]])? ((FeedRSS *)a)