i have a navigationcontroller with some viewcontrollers and i need to know
how i can trigger the back-button-action on the navigationBar of each viewcontroller.
i have an allert-view and when user presses ok on this alert-view i want the
navigationcontroller to get one step back so i need to trigger the back-button
which appears on each navigationbar on the left side.
Does somebody knows how this works :)
Because if it doenst works i have to implement a navigationcontroller under each viewcontroller to make
[self dismissViewController animated:YES completion:nil]
and i dont want to do that.
You have to pop the front most view controller from the stack.
[self.navigationController popViewControllerAnimated:YES];
You could also use
[self.navigationController popToViewController:someViewController animated:YES];
if you wanted to go directly back to someViewController.
Related
I have a popover menulet and it's contentViewController is some NSViewController. Everything fine here. The problem that I have is that I really don't understand how to change the View. I wanna load another view, and this is what I tried:
popover = [[NextViewController alloc]initWithNibName:#"NextViewController" bundle:nil];
[self.view addSubview:[popover view]];
And this works, new view is shown - but if I click on any button on that view I get error: unrecognized selector sent to instance. Why am I getting this error? Why this new view is not responding?
Please help me understand what I need to do, how to change the view on NSPopover?
I've managed to solve my problem, It turn out to be quite easy:
[self.view setSubviews:[NSArray array]]; //remove all previous subviews
[self.view addSubview:[popover view]];
i have an navigation controller in my storyboard, but for one reason i have to make one segue programmatically, but how do i make a push segue programmatically?
this is my code so far:
- (IBAction)nextviewButton:(id)sender {
HolesViewController *Holes = [self.storyboard instantiateViewControllerWithIdentifier:#"HolesViewController"];
Holes.nameString = self.NameField.text;
[self presentViewController:Holes animated:YES completion:nil];
}
Alternatively, I actually prefer to define a segue right in my storyboard, but rather than originating from the button, I have it originate from the view controller itself, e.g.:
Then, give that segue a "storyboard id", say "Details", and then you can invoke that segue programmatically via:
[self performSegueWithIdentifier:#"Details" sender: ...]; // you can specify either the button or `self` for the `sender
I like this because that way, the storyboard continues to visually represent the flow of the app (as opposed to possibly having scenes floating out there with no segues). And you can use the exact same construct for both push and modal segues (and the view controller that's presenting the next view controller doesn't care which one the storyboard uses).
[self.navigationController pushViewController:Holes animated:YES];
Got it
In the apps that i have seen, info light buttons are all in the navigation bar and when touched, the transition to a new view is a horizontal flip. Is it okay if i make an application that does not have the info light button in the navigation bar and when touched, uses the push animation to transfer the user to a new view? If not, could someone tell me how to code for the horizontal flip because when i choose Modal and flip and connect to a view, nothing happens when pressed (but works if if i choose push instead of modal.
Thanks
You can do what ever you want. There is no guideline for what kind of button should cause what kind of view change.
Here's a couple of examples of how to change view controllers:
//if you are using xibs use this line
UIViewController *controller = [[UIViewController alloc] initWithNibName:#"myXib" bundle:[NSBundle mainBundle]];
//if you are using storyboards use this line
UIViewController *controller = [self.storyboard instantiateViewControllerWithIdentifier:#"myViewControllersID"];
[controller setModalTransitionStyle:UIModalTransitionStyleFlipHorizontal];
//this sets the modal transition style
//to present the controller modally use this
[self presentViewController:controller animated:YES completion:nil];
//or if you are pushing to this controller using a navigation controller use this
[self.navigationController pushViewController:controller animated:YES];
I've got a small project with two UIImageView-based nib files.
When the main view loads, it looks correct.
To switch between views, I'm using code like this (for example, this is to go to second view)
-(IBAction) secondClicked:(id)sender {
SecondViewController *second = [[SecondViewController alloc] initWithNibName:nil bundle:nil];
[self presentModalViewController:main animated:NO];
[second release];
}
When the new view is shown, it's shifted sideways about 10% of screen. Using similar code to go back to main results in the main view being shown similarly offset.
I'm in landscape mode, if that makes a difference.
How can I display the views so they're correctly aligned?
Ok it makes sense now that I looked more carefully. Why are you presening a view controller modally when you wish to go back? How did you showed this viewController initially? If it was through a navigation controller you should pop the view
[self.navigationController popViewControllerAnimated:YES];
If it was presented modally you should just dismiss it!
[self dismissViewControllerAnimated:YES];
My Application have navigation controller and table views. When the back button is clicked and the view is popped out from controller stack, i noticed that the table events are not executed (eg: cellForRowIndexPath). Is there anyway that these events are execueted when view is popped out.
This is the code i use for pushing the view into controller stack.
MyViewController *obj = [[MyViewController alloc] initWithNibName:#"MyViewController" bundle:nil];
[self.navigationController pushViewController:obj animated:YES];
[obj release];
Regards
Sandy
You can use the ViewWillAppear and ViewWillDisappear methods.
what you want to do is put a call to
[theTable reloadData];
which initiates all of the calls that you wanted.
This call should be placed where you want the table to reload - either on appear or disappear.
Good Luck !