How to use appdelegate variable in view

you can declare variables in appdelegate.h file, these variables are global you dont need to make appdelegate object to calling them.

like this -

#import <UIKit/UIKit.h>

@class ViewController;

// these are your variable, both are global. 
int anyNumber; 
NSString *productname;

@interface AppDelegate : UIResponder <UIApplicationDelegate>

@property (strong, nonatomic) UIWindow *window;
@property (strong, nonatomic) ViewController *viewController;
@property (strong, nonatomic) UINavigationController *naviCon;

@end

Now you can use these variables at any where you want to use.

just import the appdelegate.h and use it freely.

#import "ViewController.h"
#import "AppDelegate.h"

this is your first view from where you are assigning the value to appdelegate string.

productname = name; //you can assign it directly, no need to make any object of appdelegate.

now you can use it any where. but remember little thing you have to import

#import "AppDelegate.h"

in your viewcontroller.

Thank you!

UIApplicationDelegate *appDelegate = [[UIApplication sharedApplication] delegate];
NSString * str = appDelegate.yourstr;

You can get it with this code:

UIApplicationDelegate *appDelegate = [[UIApplication sharedApplication] delegate];
NSString *productName = appDelegate.productname;