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POHow to use @protocol in AppDelegate iPhone app?
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copied!<p>I am working in iPhone app with 5 screens. I want to refresh the values in the screen 4th in UITabBarController. I have added @protocol in AppDelegate but it is not calling. This is the first time am using @protocol could you please help me to solve this issue,</p> <p>In <strong>AppDelegate.h</strong></p> <pre><code>@protocol ReloadViewControllerDelegate <NSObject> -(void) refreshViewController:(NSString *)result; @end id refreshViewControllerDelegate; @property (nonatomic, retain) id refreshViewControllerDelegate; </code></pre> <p>and i have synthesized. </p> <p>In <strong>AppDelegare.m</strong></p> <pre><code>@synthesize refreshViewControllerDelegate; if ([refreshViewControllerDelegate conformsToProtocol:@protocol(ReloadViewControllerDelegate)]) { [refreshViewControllerDelegate performSelectorOnMainThread:@selector(refreshViewController:) withObject:@"YES" waitUntilDone:NO]; }// Control not come inside of if Condition.... From here i want to update the fourthViewController.. </code></pre> <p>But <code>control not go inside of the if condition</code>. Could you please guide me where am doing wrong?</p> <p>In my <strong>4th ViewController.h</strong></p> <pre><code>#import "AppDelegate" @interface fourthViewController : UIViewController <ReloadViewControllerDelegate> </code></pre> <p>In my <strong>4th ViewController.m</strong></p> <pre><code>-(void) refreshViewController:(NSString *)result { NSLog(@"Result : %@", result); } </code></pre> <p>Can anyone please help me to do this? Thanks in advance.</p>

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