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view Controller können in derselben Aktion gestoppt und verschoben werden

ist es möglich, eine Ansicht aus dem Navigationsstapel zu ziehen und eine weitere gerade darauf zu schieben?

Ich versuche, eine flache Hierarchie für diesen Abschnitt zu implementieren, und möchte einen segmentierten Controller haben, aber ich kann den segmentierten Controller nicht so aussehen lassen, wie ich es möchte, weshalb ich versuche, den Navigationscontroller zu verwenden. 

Wenn auf eine Schaltfläche geklickt wird, habe ich diesen Code ausgeführt:

[[self navigationController] popViewControllerAnimated:YES];
        MapsViewController *aViewController = [[MapsViewController alloc]
                                               initWithNibName:@"MapsViewController" bundle:nil];
[self.navigationController pushViewController:aViewController animated:NO];
[aViewController release];

Es klingelt in Ordnung, aber es gibt keine Anzeichen von Druck! Jede Hilfe wäre dankbar.

37
Josh
 MapsViewController *aViewController = [[MapsViewController alloc]
                                        initWithNibName:@"MapsViewController" bundle:nil];
     // locally store the navigation controller since
     // self.navigationController will be nil once we are popped
 UINavigationController *navController = self.navigationController;

     // retain ourselves so that the controller will still exist once it's popped off
 [[self retain] autorelease];

     // Pop this controller and replace with another
 [navController popViewControllerAnimated:NO];//not to see pop

 [navController pushViewController:aViewController animated:YES];//to see Push or u can change it to not to see.

Oder

 MapsViewController *aViewController = [[MapsViewController alloc]
                                        initWithNibName:@"MapsViewController" bundle:nil];


UINavigationController *navController = self.navigationController;

//Get all view controllers in navigation controller currently
NSMutableArray *controllers=[[NSMutableArray alloc] initWithArray:navController.viewControllers] ;

//Remove the last view controller
[controllers removeLastObject];

//set the new set of view controllers
[navController setViewControllers:controllers];

//Push a new view controller
[navController pushViewController:aViewController animated:YES];

Entnommen aus https://stackoverflow.com/users/1619554/tomer-peled , so dass andere es leichter finden können.

Dies scheint der beste Weg für iOS8 zu sein:

UIViewController *newVC = [[UIViewController alloc] init]; // Replace the current view controller 
NSMutableArray *viewControllers = [NSMutableArray arrayWithArray:[[self navigationController] viewControllers]];
[viewControllers removeLastObject]; 
[viewControllers addObject:newVC]; 
[[self navigationController] setViewControllers:viewControllers animated:YES];
30
Peter Johnson

In Swift:

let newVc = UIViewController()
var vcArray = self.navigationController?.viewControllers
vcArray!.removeLast()
vcArray!.append(newVc)
self.navigationController?.setViewControllers(vcArray!, animated: false)

Falls newVc in einem Storyboard vorhanden ist:

let storyboard = UIStoryboard(name: "Main", bundle: nil)
let newVc = storyboard.instantiateViewControllerWithIdentifier("YourViewControllerIdentifier") as! UIViewController
var vcArray = self.navigationController?.viewControllers
vcArray!.removeLast()
vcArray!.append(newVc)
self.navigationController?.setViewControllers(vcArray!, animated: false)
23
Rodrigo Pedroso

Swift 4:  

self.navigationController.setViewControllers[].. hat für mich nicht geklappt. Ich bin jedoch in der Lage, das Problem zu lösen, indem ich einen Navigationscontroller in einer Instanzvariablen halte und die Push/Pop-Operation ausführt. So leise in der Lage, den Controller ohne Störungen zu wechseln.

  guard let navigationVC = self.navigationController else { return }  
    navigationVC.popViewController(animated: false)
    navigationVC.pushViewController(myNewVC, animated: false)
8
byJeevan

Sie können diesen Code verwenden, um Ihren Controller zu öffnen oder zu drücken.

Für Ziel C

bool alreadyPushed = false;    
//Check if the view was already pushed
NSMutableArray *viewControllers;
if ( (viewControllers = [NSMutableArray arrayWithArray:self.navigationController.viewControllers])) {

    for (UIViewController *aViewController in viewControllers) {

        if ([aViewController isKindOfClass:[YourControllerName class]]) {
            NSLog(@"pop your view controller");
            [self.navigationController popToViewController:aViewController animated:YES];
            alreadyPushed = true;
            break;
        }
    }
}

//Push Fresh View
if( alreadyPushed == false) {

    NSLog(@"Push your view controller");
    YourControllerName *YourControllerObject = [[YourControllerName alloc]initWithNibName:@"YourNibName" bundle:nil];        
    [self.navigationController pushViewController:YourControllerObject animated:YES];

}

Für Swift

  var alreadyPushed = false            
        //Check if the view was already pushed
        if let viewControllers = self.navigationController?.viewControllers {
            for viewController in viewControllers {                    
                if let viewController = viewController as? YourControllerName {                                               
                    self.navigationController?.popToViewController(viewController, animated: true);                        
                    print(" Push Your Controller")
                    alreadyPushed = true
                    break                        
                }
            }
        }                        
        if alreadyPushed == false {                
            let YourControllerObject = self.storyboard?.instantiateViewControllerWithIdentifier("YourControllerIdentifire") as! YourControllerName             
            self.navigationController?.pushViewController(YourControllerObject, animated: true)

        }
4
Vikram Pote
BOOL Present = NO;

fifthViewController * fifthVC = [self.storyboard instantiateViewControllerWithIdentifier:@"homeController"];


for (UIViewController* viewController in self.navigationController.viewControllers) {

    //This if condition checks whether the viewController's class is MyGroupViewController
    // if true that means its the MyGroupViewController (which has been pushed at some point)
    if ([viewController isKindOfClass:[fifthViewController class]] )
    {

        // Here viewController is a reference of UIViewController base class of MyGroupViewController
        // but viewController holds MyGroupViewController  object so we can type cast it here
        fifthViewController *groupViewController = (fifthViewController*)viewController;
        [self.navigationController popToViewController:groupViewController animated:NO];
        Present=YES;
    }

}

if(Present==NO)
{
    [self PushAnimation];
    [self.navigationController pushViewController:fifthVC animated:NO];

    Present=YES;
}
0
Vikash Kumar

Swift 3.0

Falls jemand tief in die Ansichtshierarchie einsteigen möchte:

                //Go back to desired viewController and then Push another viewController
                var viewControllers = self.navigationController!.viewControllers
                while !(viewControllers.last is MyViewControllerClass) {
                    viewControllers.removeLast()
                }
                // go to new viewController
                let anotherViewController = AnotherViewController(nibName: "AnotherViewController", bundle: nil)
                viewControllers.append(anotherViewController)
                self.navigationController?.setViewControllers(viewControllers, animated: true)
0
Mohit Padalia