Objective-C Programming: The Big Nerd Ranch Guide

17 NSArray

NSArray is another commonly used Objective-C class. An instance of NSArray holds a list of pointers to other objects.

Create a new project: a Foundation Command Line Tool called DateList. This program will create an array that holds a list of pointers to NSDate objects.

Creating arrays

Open main.m and change main():

#import <Foundation/Foundation.h>

int main(int argc, const char * argv[])
{
    @autoreleasepool {

        // Create three NSDate objects
        NSDate *now = [NSDate date];
        NSDate *tomorrow = [now dateByAddingTimeInterval:24.0 * 60.0 * 60.0];
        NSDate *yesterday = [now dateByAddingTimeInterval:-24.0 * 60.0 * 60.0];

        // Create an array containing all three
        NSArray *dateList = @[now, tomorrow, yesterday]; } return ...