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copied!<p>You can use a delegate. So in your ViewController B you need to create a protocol that sends data back to your ViewController A. Your ViewController A would become a delegate of ViewController B. </p> <p>If you are new to objective C, please look at <a href="https://stackoverflow.com/a/2534583/849123">What is Delegate</a>.</p> <p>Create protocol in ViewControllerB.h :</p> <pre><code>#import <UIKit/UIKit.h> @protocol senddataProtocol <NSObject> -(void)sendDataToA:(NSArray *)array; //I am thinking my data is NSArray, you can use another object for store your information. @end @interface ViewControllerB : UIViewController @property(nonatomic,assign)id delegate; </code></pre> <p>ViewControllerB.m</p> <pre><code>@synthesize delegate; -(void)viewWillDisappear:(BOOL)animated { [delegate sendDataToA:yourdata]; } </code></pre> <p>in your ViewControllerA : when you go to ViewControllerB </p> <pre><code>ViewControllerA *acontollerobject=[[ViewControllerA alloc] initWithNibName:@"ViewControllerA" bundle:nil]; acontollerobject.delegate=self; // protocol listener [self.navigationController pushViewController:acontollerobject animated:YES]; </code></pre> <p>and define your function: </p> <pre><code>-(void)sendDataToA:(NSArray *)array { // data will come here inside of ViewControllerA } </code></pre> <p>Edited :</p> <p>You can See this example : How you can Pass data back to previous viewcontroller: <a href="https://www.dropbox.com/s/002om8efpy6fout/passDataToPreviousContoller.zip" rel="noreferrer">Tutorial link</a></p>

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