Passing an Object to UIViewController Class

Question

I am working on an app in which I want to pass an object of a class from one UIViewController to another, How I can do that?

Answer 1

Say you have a firstViewController and a secondViewController. Say, you want to pass on a NSString *testString; from the first to the second view.

In that case, you should declare this NSString using @property in the secondViewController.h-file, and @synthesize it in the secondViewController.m-file.

In the firstViewController, when you create an instance of the secondViewController (through secondViewController *secondView = [[secondViewController alloc] initWith...];, use the line: secondView.stringYouCreatedUsingSynthesize = testString;

Answer 2

when you initialize your new View Controller define a variable as follows:

 MyClass *myClass = [[MyClass alloc] init];
 myClass.username = @"Rahul Kushwaha"; 
 // assume a property called username is defined in MyClass of a NSString type.

 NextViewController *controller = [NextViewController alloc];
 controller.myClassObject = myClass ;
 [self.navigationController pushViewController:controller animated:YES];

Don't forget you have to define an object of type (MyClass) in NextViewController.

Sample

NextViewController.h

#import "MyClass.h"

@interface NextViewController
{
  MyClass *myClassObject;
}

@property (nonatomic,retain) MyClass *myClassObject;

---

NextViewController.m

@synthesize myClassObject;