CODEWITHSUNDEEP
iosobjective-cuiviewcontroller
VenushkaT
VenushkaT

Reputation: 1150

Passing Data between View Controllers Xcode 5

I'm new to iOS and Its developing.i have read Xcode old style passing data between view controllers.there i have seen lot of things going with xib files.please find below the code i have used to pass data in-between ViewControllers.but there in customelink(please find DetailViewController.m)there I'm getting Null value.please help me to get String value there.and kind enough to explain what are the mistakes I've done here.

EssentialInfoController.h

#import <UIKit/UIKit.h>
#import "DetailViewController.h"
@interface Essentialinfocontroller : UIViewController
@end

EssentialInfoController.m

#import "Essentialinfocontroller.h"

@interface Essentialinfocontroller ()
@end

@implementation Essentialinfocontroller


- (void)viewDidLoad
{
    [super viewDidLoad];
    DetailViewController * customelink= [DetailViewController alloc ];
    customelink.link=@"https://www.facebook.com";



}

@end

DetailViewController.h

#import <UIKit/UIKit.h>

@interface DetailViewController : UIViewController
@property(weak,nonatomic)NSString * link;

@end

DetailViewController.m

 #import "DetailViewController.h"

    @interface DetailViewController ()

    @property(nonatomic,weak)NSString *customelink;
    @end

    @implementation DetailViewController
    @synthesize link;

    @synthesize customelink;


    - (void)viewDidLoad
    {
        [super viewDidLoad];
        self.customelink=self.link;


        NSLog(@"link--> %@",customelink);// here 2014-07-06 21:21:51.469 WADTourisum[880:60b] link--> (null)

    }

    @end

Upvotes: 0

Views: 66

Answers (1)

Pham Hoan
Pham Hoan

Reputation: 2127

DetailViewController * customelink= [DetailViewController alloc ];

should be

DetailViewController * customelink= [[DetailViewController alloc ] init];

and 

@property(weak,nonatomic)NSString * link;

should be

@property(strong,nonatomic)NSString * link;

and log it

NSLog(@"link--> %@",self.link);

you don't need this one

@property(nonatomic,weak)NSString *customelink;

if you use storyboard and segue then you have to implement -(void)prepareForSegue method.

- (void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender
{
    // Make sure your segue name in storyboard is the same as this line
    if ([[segue identifier] isEqualToString:@"YOUR_SEGUE_NAME_HERE"])
    {
        // Get reference to the destination view controller
        YourViewController *vc = [segue destinationViewController];

        // Pass any objects to the view controller here, like...
        [vc setMyObjectHere:object];
    }
}

assume that you got a button to move from essentialVC to detailVC, in you IBAction, call this method:

[self performSegueWithIdentifier:@"YOUR_SEGUE_NAME_HERE" sender:self];

this is just a brief answer. I suggest you read about UINavigationController first, it's much easier to use compared to segue, IMHO.

Upvotes: 1

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