push a view controller from a UIView ios - ios

Question

I have a navigation based application.On click of a button on the navigation bar in the first screen , I am able to push another view controller as follows :
-(void) buttonClicked:(id)sender
{
UIViewController* mv = [[SecondViewController alloc] init];
[[self navigationController] pushViewController:mv animated:YES];
}
Now i have a UIView(separate .h and .m files) as part of the first screen. On click of a button in the UIView, i want to push the SecondViewController.
I have tried the following :
UIViewController* mv = [[SecondViewController alloc] init];
UIViewController * home=[[FirstViewController alloc]init];
[[home navigationController] pushViewController:mv animated:YES];
It doesnt work!! Kindly help

Answer 1

UIViewController* mv = [[SecondViewController alloc] init];
UIViewController * home=[[FirstViewController alloc]init];
[[home navigationController] pushViewController:mv animated:YES];
The problem here is that home isn't part of the navigation stack, so [home navigationController] is surely nil. I'm not quite clear on what you're trying to do here, but just creating a view controller doesn't mean that it's actually part of the view controller graph.

Answer 2

Why would it work? Randomly creating view controllers whose view is not even visible, is not the solution. You can either keep a reference to the VC in the view like this:
#imlementation ViewController
- (id) init
{
// ...
aView = [[CustomView alloc] init];
aView.viewController = self;
// ...
}
#end
#interface CustomView
#property (assign) ViewController *viewController;
#end
Or you can search the responder chain at runtime:
UIResponder *next = [view nextResponder];
while (next)
{
if ([next isKindOfClass:[ViewController class]])
{
break;
}
next = [next nextResponder];
}
And now "next" will contain the view controller (or nil if it can't be found).

Answer 3

Try using the same navigationController to push view, this keeps the same stack of ViewControllers.
UIViewController* mv = [[SecondViewController alloc] init];
[[self navigationController] pushViewController:mv animated:YES];
[mv release];

Answer 4

I see your problem now! You need to #import your FirstViewController, then #class it. Then do your push.
So:
//.h
#import "FirstViewContoller.h"
#class FirstViewController;
#interface...
//.m
-(void)return {
FirstViewController *firstview = [[FirstViewController alloc]init(withnibname:)];
[firstView.navigationController pushViewController: firstView.navigationController.topViewController animated: TRUE];
}

Answer 5

If I am not wrong, your UIView though is in separate files, is still added to the screen from a UIViewController class.
Simply, post a notification from UIView to your FirstViewController class where you have access to the navigation controller. Then push the SecondViewController from there.

Answer 6

You Can use this. It Works very well for me:-
Firstly Create Object of AppDelegate in UIView Class and initialize it. Then create Navigationcontroller object in Appdelegate.h :-
#property(strong,nonatomic) UINavigationController *navControl;
In your UIView Class implement this code where you want to push :-
ViewController *objview = [[ViewController alloc]init]; [appDelegate.navControl pushViewController:objview animated:YES];