nsarray

Concatenation of two arrays in Objective-C

由 孤者浪人 提交于 2019-12-09 05:00:48
问题 How to concatenate two arrays into a single array in Objective-C? 回答1: NSArray* newArray = [firstArray arrayByAddingObjectsFromArray:secondArray]; Or using mutable array version just add to it all objects from another array: [myMutableArray addObjectsFromArray:secondArray]; 回答2: With immutable arrays: NSArray *arr1 = @[@(1), @(2), @(3)]; NSArray *arr2 = @[@(4), @(5), @(6)]; NSArray *arr3 = [arr1 arrayByAddingObjectsFromArray:arr2]; or adding onto a mutable array: NSArray *arr1 = @[@(1), @(2),

IOS: store an array with NSUserDefault

由 别说谁变了你拦得住时间么 提交于 2019-12-09 04:57:04
问题 I want to store an array with NSUserDefault , then, I put in applicationDidEnterBackground [[NSUserDefaults standardUserDefaults] setObject:myArray forKey:@"myArray"]; and in application didFinishLaunchingWithOption myArray= [[NSMutableArray alloc] initWithArray:[[NSUserDefaults standardUserDefaults] objectForKey:@"myArray"]]; it's ok for multitasking device, but for not-multitasking device, how can I solve? 回答1: Store the object in NSUserDefaults in -applicationWillTerminate: , if it hasn't

How to slice an NSArray in Objective-C?

由 江枫思渺然 提交于 2019-12-09 02:10:24
问题 What's the simplest way to extract a slice of an NSArray in Objective-C? (much like the array_slice function in PHP) 回答1: -[NSArray subarrayWithRange:] Reference: https://developer.apple.com/documentation/foundation/nsarray/1415157-subarraywithrange 来源： https://stackoverflow.com/questions/1752955/how-to-slice-an-nsarray-in-objective-c

How do I format a text file to be read in using arrayWithContentsOfFile

由 淺唱寂寞╮ 提交于 2019-12-09 01:52:23
问题 I have several large word lists and I had been loading them in place in the code as follows: NSArray *dict3 = [[NSArray alloc] initWithObjects:@"abled",@"about",@"above",@"absurd",@"absurdity", ... but now it is actually causing an exc_bad_access error weirdly, i know it seems implausible but for some reason IT IS causing it. (trust me on this I just spend the better part of a day debugging this crap) Anyway, I'm looking to get these humongous lines of code out of my files but I'm not sure

How to get the values from array with dicitionary in swift?

由 最后都变了- 提交于 2019-12-08 15:26:38
问题 I want get the below json to my array for showing in UITableview { MyPets = ( { breed = ""; breedvaccinationrecord = ""; "city_registration" = ""; "date_of_birth" = ""; "emergency_contacts" = ""; gender = m; "pet_id" = 475; "pet_name" = "IOS PET"; petinfo = "http://name/pet_images/"; "prop_name" = ""; "qr_tag" = 90909090; species = Canine; "vaccination_records" = ""; vaccinationrecord = "http://Name/vaccination_records/"; "vet_info" = ""; } ); } i am using below code to get values into array

iPhone: Setting section titles from an Array

由 微笑、不失礼 提交于 2019-12-08 15:22:38
问题 I have an XML file, two nodes, text and title. I'm trying to progrmatically set the section title from an array I've built up. Is there a way I can do similar to the following (but I'm not sure how to bring in the item row?) -(NSString *)tableView:(UITableView *)tableView titleForHeaderInSection:(NSInteger)section { return [arrySummaryTitle objectAtIndex:indexPath.row]; } How else do you set the section title from an Array ? 回答1: I must be misunderstanding something... What you'd want to make

How to get last element from NSMutableArray in which status as complete?

由 被刻印的时光 ゝ 提交于 2019-12-08 15:19:33
I have an array of dictionaries in following format [ { "status":"not completed", "rating":2 },{ "status":"completed", "rating":2 },{ "status":"not completed", "rating":"<null>" },{ "status":"completed", "rating":"<null>"},{ "status":"not completed", "rating":"<null>" } ] and from this i want response as last object where status is completed and rating is null output { "status":"completed", "rating":"<null>" } how do i get second element easily without any big iteration. in real case this array might contains 150-300 elements. -(void)checkRecentUnratedOrder:(NSMutableArray *)order{ NSLog(@

Sorting Array Based on custom object values

由 血红的双手。 提交于 2019-12-08 12:57:47
问题 I Need to Sort out an array of custom objects. The object is simple, it stores an x and y co-ordinate, for example: XYPointObject.xCoordinate = [NSNumber]; XYPointObject.yCoordinate = [NSNumber]; I have an array that stores up to 676 of these objects that I need to sort into a numerical order as in x values in numerical order, and the y values connected to the x values in order as well. for example, if the input co-ordinates are: 23,5 | 5,7 | 1,4 | 1,7 | 21,8 | 9,12 | 16,19 the sorted array

How to save data from parse to a NSArray iOS

由 走远了吗. 提交于 2019-12-08 12:46:12
问题 How can I save data from parse to an NSArray in the below format. which is being used to populate a UITableView , which is to be used for a search bar. _candyArray = [NSArray arrayWithObjects: [Candy candyOfCategory:@"chocolate" name:@"chocolate bar" mName:@"test1"], [Candy candyOfCategory:@"chocolate" name:@"chocolate chip" mName:@"test1"], [Candy candyOfCategory:@"chocolate" name:@"dark chocolate" mName:@"test1"], [Candy candyOfCategory:@"hard" name:@"lollipop" mName:@"test1"], [Candy

Why Rand() always generates random numbers with fixed Unique Group count?

由 我的未来我决定 提交于 2019-12-08 12:00:43
问题 Even though , I execute the below code again & again I get the same Output. But , I think it should not: int ObjectCount =500; NSMutableArray *mut_arr = [[NSMutableArray alloc]initWithCapacity:0]; for (int i = 0; i<ObjectCount ; i++) { [mut_arr addObject:[NSNumber numberWithInt: rand()%ObjectCount]]; } NSSet* uniqueSet = [NSSet setWithArray:mut_arr]; NSLog(@"Array of %d objects generates %d Unique Objects",[mut_arr count],[uniqueSet count]); The output is as follows: Array of 500 objects
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