How to back to UIViewController from a NSObject Class in iOS - ios

Question

I have a UIViewController Class. In that class I implement a UIWebView. On that WebView I got data from CocoaHttpServer and loading a html page. In CocoaHTTPServer have a NSObject Class. In that Class I got one method for pop to previous Screen. How to Pop to view controller from NSObject class.
This is my NSObject class
if([[array lastObject] compare:#"back-button-clicked"] == NSOrderedSame) {
[self handleBackActionRequest];
}
-(void)handleBackActionRequest
{
PGSoftApViewController *softAP = [[PGSoftApViewController alloc] initWithNibName:nil bundle:nil];
[softAP webToBackNativeCall];
}
This is in my ViewController class :
-(void)webToBackNativeCall
{
[self.navigationController popViewControllerAnimated:YES];
}
This is not working. I am able to insert webToBackNativeCall method. But its not happening anything.
I have to go back. How can I. Please help me.

Answer 1

In your NSObject.h class add protocol like this
#protocol nsobjectDelegate <NSObject>
-(void)navigateToBackVC;
#end
#interface objectClass:NSObject
//your other code
#property (nonatomic,weak) id<nsobjectDelegate> objDelegate;
#end
In you NSObject .m class
-(void)webToBackNativeCall
{
// this method you already have
// other code if you want
[self.objDelegate navigateToBackVC];
}
In you view controller .h class
#interface objectClass:NSViewcontroller <nsobjectDelegate> // delegate of NSObject include it in VC when you want to call that methods
In you view controller .m file in viewDidLoad or willAppear or DidAppear method initializ object of NSObject class and set delegate
NSObjectClass *objeObject = [[NSObjectClass alloc] init];
objeObject.objDelegate = self;
implement this method
-(void)navigateToBackVC
{
[self.navigationController popViewControllerAnimated:YES];
}
This is general concept of protocol and delegate.
Hope this might help you.

Answer 2

In viewDidLoad of your ViewController
[[myNSOBjectClass alloc] startViewController:self];
In NSObject Class
#interface myNSOBjectClass{
//Global access to the view controller.
UIViewController *viewController;
}
#implementation myNSOBjectClass
//function that the caller calls to pass their UIViewController
- (void)startViewController:(UIViewController *)callerViewController{
viewController = [[UIViewController alloc]init];
//puts the caller's view controller to the global member.
viewController = callerViewController;
}