Assume that I have an application using tabbarcontroller with 10 UIViewControllers, once the UIViewController is more than 5, the Apple iPhone will generate the moreViewController for me to store rest of the UIViewController. My Question is, I want to implement a customized method to back to the more viewController, instead of using the default back in the left corner. How can I do so?
I tried with
[moreNavigationController popToRootViewControllerAnimated:NO];
but it seems that I have no luck. Thank you.
You can create an array of ViewControllers and then pop to the view Controller you need.
You can try this block of code
-(IBAction)home:(id)sender{
NSArray *array = self.navigationController.viewControllers;
[self.navigationController popToViewController:[array objectAtIndex:1] animated:YES];
}
Cheers
[self.navigationController popToRootViewControllerAnimated:YES]
Related
anybody know how to popToViewController ?
example:
introvideo-> welcomeview & tutorialview-> mainviewcontroller-> scannerviewcontoller-> questionview ->(if answer correct -> correctView) else ->wrongView
how do i pop back to mainView controller ?
One way is to iterate through the viewControllers array of the navigation controller. You can identify the correct one by tag, class name, etc.
based on what you have written It looks like MainViewController is the 4th ViewController on the navigation stack.
[self.navigationController popToViewController:[arrayOfViewControllers objectAtIndex:3] animated:YES];
should do the trick.
I have 2 view controllers in my project. Inside View Controller1 I want to switch to View Controller 2 by press of a button. Currently I do this
- (IBAction)startController2:(id)sender {
viewController1 vc2 = [[viewController2 alloc] init];
self.view = vc2.view;
}
This seems to work fine, but there is a big delay (4 secs) between the button press and second view controller appears. If I call the viewController2 directly from the AppDelegate things load faster. What am I doing wrong here. Any help is greatly appreciated.
Several things to consider.
Part 1: "What am I doing wrong here"?
You definitely didn't mean to do self.view = vc2.view. You just put one view controller in charge of another view controller's view. What you probably mean to say was [self.view addSubview:vc2.view]. This alone might fix your problem, BUT...
Don't actually use that solution. Even though it's almost directly from the samples in some popular iPhone programming books, it's a bad idea. Read "Abusing UIViewControllers" to understand why.
Part 2: What you should be doing
It's all in the chapter "Presenting View Controllers from Other View Controllers".
It'll come down to either:
a UINavigationController, (see the excellent Apple guide to them here) and then you simply [navigationController pushViewController:vc2]
a "manually managed" stack of modal view controllers, as andoabhay suggests
explicitly adding a VC as child of another, as jason suggests
You should consider using UINavigationController to switch view controllers. If your building target is iOS 5.0+, you can also use the new controller container concept: [mainViewController addChildViewController:childViewController].
Use presentModalViewController as follows
[self presentModalViewController:vc2 animated:YES completion:^(void){}];
and in the viewController1 use
[self dismissModalViewControllerAnimated:YES completion:^(void){}];
where ever you want to go back to previous controller.
[aController presentViewController:bController animated:NO completion:nil];
[bController presentViewController:cController animated:NO completion:nil];
when you want dismiss cController, you can do like this
[aController dismissViewControllerAnimated:NO completion:nil];
this is the flow chart.
aController → bController → cController
↑___________________________↓
You should use UINavigationController to switch view controllers.
You are on View1 and add the following code on button click method.
View2 *View2Controller = [[View2 alloc] initWithNibName:#"View2" bundle:nil];
[self.navigationController pushViewController:view2Controller animated:YES];
I am new to IOS, sorry in advance if I ask a stupid question.
I use UITabBarController and navigationController to control view.
At my last view, I would like to have a button when the button is pressed, view will return to rootViewController which I set by MainWindow.xib file and kill any process which run in app background.
this is my code in the last view before I want to back to rootViewController:
-(IBAction)doneButtonPressed:(id)sender{
JourneyIndexViewController *journeyIndexVC = [[JourneyIndexViewController alloc] initWithNibName:#"JourneyIndexViewController" bundle:nil];
[journeyIndexVC setDistanceLabelValue:self.distanceLabelValue];
[self.navigationController pushViewController:journeyIndexVC animated:YES];
[journeyIndexVC release];
[self dismissModalViewControllerAnimated:YES];
}
JourneyIndexViewController is the rootViewController that I set in MainWindow.xib.
Thank you very much for your advance support.
try
[self.navigationController popToRootViewControllerAnimated:YES];
You should take a look at this: UINavigationController Class Reference for better understanding
I am making a few assumptions here, but if JourneyIndexRootViewController is your rootViewController and is created in IB (in a nib), you do not need to re-crete it when pushing the button. It sounds like you simply need to remove the UINavigationController that you added on top of the rootViewController.
Try this. This should pop you back to the Previous View Controller.
[self.navigationController popViewControllerAnimated:NO];
Hope this helps
Hi
I am using following method to go back to one of the previous view. This is working. But I got two issues with this.
This line gives a memory leak when I use Instrument.
After popup to particular view, when I press left navigation button (back button) just only this button will disappear and view will remain.
Can anyone please let me know how to overcome these issues?
[self.navigationController popToViewController:[self.navigationController.viewControllers objectAtIndex:1] animated:YES];
Thank you
try [self.navigationController popViewControllerAnimated:YES]; if you just with to remove current view from the view hierarchy,
If you, as you describe, just wants to pop just the active viewController, you can use
- (UIViewController *)popViewControllerAnimated:(BOOL)animated
documentation here.
If this still give problems, there is something wrong with your viewController hierarchy.
Hi agree with the above answers
try these methods carefully
[self.navigationController popToRootViewControllerAnimated:YES];
[self.navigationController popToViewController:(UIViewController*)
animated:(BOOL)];
Working with iOS5.
[self.navigationController popViewControllerAnimated:(BOOL)];
First, I would like to warn that I am a complete newbie into iPhone coding...
I need to show up a viewcontroller from a library, I know that it is modal. I have a tab bar app (created with the default XCode template). I need to show that viewcontroller, there are no problem if it hides the tabbar itself... But I am quite clueless, I don't know even what to search, or what to read...
You can call presentModalViewController:animated: to display another UIViewController modally.
EDIT: If you want to display your modal view in response to a button touch (for example), you would display it like this:
- (IBAction)buttonTouched:(id)sender
{
ModalViewController* controller = [[ModalViewController alloc] init];
[self presentModalViewController:controller animated:YES];
[controller release];
}
Then when you want to dismiss the modal controller, call dismissModalViewControllerAnimated:. This can be called either on your main view controller, or the modal one.
I don't know even what to search, or
what to read...
View Controller Programming Guide is a good place to start to help you understand view controllers (including modal ones). If that's confusing, get a bigger picture with iOS Application Programming Guide or start at the very beginning.
You can call modal view as
YourViewController *yvc = [[YourViewController alloc] initWithNibName:#"YourViewController" bundle:YES]
[self presentModalViewController:yvc animated:YES];
You can call it in the IBAction method in case you want to call it on any control event like Button Click
-(IBAction)buttonClicked:(id)sender
{
YourViewController *yvc = [[YourViewController alloc] initWithNibName:#"YourViewController" bundle:YES]
[self presentModalViewController:yvc animated:YES];
}
You can call it using self.
Hope this helps you.
If you have more doubts on this then you can ask me.