Is it possible to get a NSArray from AppDelegate? - objective-c

Question

Is it possible to get a NSArray from my AppDelegate? I need to send a array to other classes. And that array is generated in my AppDelegate. Thanks!

Answer 1

First of all you should have to alloc and init
In AppDelegate.h file
#property(nonatomic,retain)NSArray *books;
In AppDelegate.m file your array, then You can add objects in it.
_books = [[NSArray alloc]initWithObjects:#"test",#"test", nil];
You should have to create AppDelegate instance in your BooksDetailViewController like this,
in .h file
AppDelegate *appDelegate;
and in .m file
appDelegate = (AppDelegate*)[UIApplication sharedApplication].delegate;
Now you can access your array like this,
NSLog(#"Test Log :%#",appDelegate.books);
Output :
2016-07-14 13:04:08.211 Gridz[2490:39240] Test Log :(
test,
test
)

Answer 2

AppDelegate *appDelegate = (AppDelegate *)[[UIApplication sharedApplication] delegate];
Now you can use any property or method like:
[appDelegate myProperty] or [appDelegate myMethod]
Hope this helps

Answer 3

It is possible to get the NSArray from AppDelegate to other classes.
AppDelegate.h
#import <UIKit/UIKit.h>
#interface AppDelegate : UIResponder <UIApplicationDelegate> {
}
#property (nonatomic, strong) UIWindow *window;
#property (nonatomic, strong) ViewController *viewController; //For Xib
#property (nonatomic, strong) NSArray *arrayObjects;
#end
AppDelegate.m
#import "AppDelegate.h"
#import "ViewController.h"
#implementation AppDelegate
#synthesize arrayObjects;
As I use Xib, I set the root view controller in below method.If you use stroy board, it is enough to add NSArray objects only.Don't need to set the root view controller.
//For XIB
- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions
{
arrayObjects = [[NSArray alloc]initWithObjects:#"Steve",#"jobs",#"Tim",#"Cook",nil];
self.window = [[UIWindow alloc] initWithFrame:[[UIScreen mainScreen] bounds]];
// Override point for customization after application launch.
self.viewController = [[ViewController alloc] initWithNibName:#"ViewController" bundle:nil];
UINavigationController *navController = [[UINavigationController alloc] initWithRootViewController:self.viewController];
self.window.rootViewController = navController;
[navController setNavigationBarHidden:YES];
[self.window makeKeyAndVisible];
return YES;
}
//For Storyboard
- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions
{
arrayObjects = [[NSArray alloc]initWithObjects:#"Steve",#"jobs",#"Tim",#"Cook",nil];
return YES;
}
Then in ViewController.m
You can also import the AppDelegate in ViewController.m
#import "ViewController.h"
#import "AppDelegate.h"
#interface ViewController ()
#end
#implementation ViewController
Now in viewDidLoad method
- (void)viewDidLoad
{
[super viewDidLoad];
// Do any additional setup after loading the view, typically from a nib.
AppDelegate *delegate = (AppDelegate*)[[UIApplication sharedApplication] delegate];
NSLog(#"The app delegate NSArray Objects are - %#",delegate.arrayObjects);
}
The NSLog results are
The app delegate NSArray Objects are - (
Steve,
jobs,
Tim,
Cook
)