Access your data using class object.

Steps to follow:- 1. Create a NSObject class called DataObject. 2. Declare properties as below...

Write below code in DataObject.h file

@interface DataObject : NSObject

@property (strong, nonatomic) NSString *userId;
@property (strong, nonatomic) NSString *companyName;
@property (strong, nonatomic) NSString *name;
@property (strong, nonatomic) NSString *imgStr;

3. Write below code in DataObject.m file

@synthesize userId, companyName, name, imgStr;

4. In AppDelegate.h create an Array..

@property (strong, nonatomic) NSMutableArray *arrModelData;

5. In AppDelegate.m

@synthesize arrModelData;

6. In some class where you filled these properties using your Data (Here I am using Web json data example.. ).

 NSMutableDictionary *dict = [NSJSONSerialization JSONObjectWithData:urlData options:0 error:nil];
    DataObject *model = [[DataObject alloc]init];
        [model setName:[dict valueForKey:@"name"]];
        [model setCompanyName:[dict valueForKey:@"companyName"]];
        [model setImgStr:[dict valueForKey:@"imgStr"]];
        [model setUserId:[dict valueForKey:@"userId"]];

7. And copy model object to arrModelData of AppDelegate

AppDelegate *objAppDelegate = (AppDelegate *)[UIApplication sharedApplication].delegate;
                        [appDelegate.arrModelData addObject: model];    

8. Now you can use these properties where you required. Create and initialize DataObject and access all properties then,

 DataObject *model = [objAppDelegate.arrModelData objectAtIndex:0 ];
    NSLog(@"image string is :  %@", model.imgStr);
    NSLog(@"Name is :  %@", model.name);
    NSLog(@"Company Name is :  %@", model.companyName);
    NSLog(@"UserId is : %@", model.userId);