how and where do I initialize an global NSMutableArray in Xcode 5

Question

I am trying to initialize a global NSMutableArray that I can add integers to later. I just need to know how and where I should initialize my array so that it can be accessed and changed by any function that I use later in my program. Also I am using Xcode 5 and know that the array needs to be 180 in length.

Answer 1

In your AppDelegate.h file -

@property(nonatomic,retain) NSMutableArray *sharedArray;

In AppDelegate.m

@synthesize sharedArray;

In didFinishLaunchingWithOptions -

sharedArray = [[NSMutableArray alloc]init];

Now,

make create shared object of AppDelegate like-

mainDelegate = (AppDelegate *)[[UIApplication sharedApplication]delegate];

and access sharedArray where you want to access using-

mainDelegate.sharedArray

Answer 2

You could create a singleton class and define a property for your array on that class.

for example:

// .h file
@interface SingletonClass : NSObject
@property (nonatomic,retain) NSMutableArray *yourArray; 
+(SingletonClass*) sharedInstance;
@end

// .m file

@implementation SingletonClass

+(SingletonClass*) sharedInstance{
    static SingletonClass* _shared = nil;
    static dispatch_once_t onceToken;
    dispatch_once(&onceToken, ^{
        _shared = [[self alloc] init];
        _shared.yourArray = [[NSMutableArray alloc] init];
     });
     return _shared;
  }

@end