So I'm making an iPad app for the very first time and right now I have one view controller with its buttons displayed on the storyboard and everything and what I want to do is when I click on a certain button, it brings me to a new screen.
So I created a second viewcontroller class for the second screen and I created an IB Action method for the button but it's empty because I don't know how to implement it. So what do I have to do to accomplish this?
Try it....
if (UI_USER_INTERFACE_IDIOM() == UIUserInterfaceIdiomPad)
{
// iPad-specific interface here
LBAlertLoginViewController *lbAlertLoginVc = [[LBAlertLoginViewController alloc]initWithNibName:#"LBAlertLoginViewController_iPad" bundle:nil];
[self.navigationController pushViewController:lbAlertLoginVc animated:YES];
[lbAlertLoginVc release];
}
else
{
// iPhone and iPod touch interface here
LBAlertLoginViewController *lbAlertLoginVc = [[LBAlertLoginViewController alloc]initWithNibName:#"LBAlertLoginViewController_iPhone" bundle:nil];
[self.navigationController pushViewController:lbAlertLoginVc animated:YES];
[lbAlertLoginVc release];
}
Hope i helped.
Related
I'm performing a segue with a navigation bar over a view that has the navigation bar hidden, when the segue starts my current view seems to get pushed down by the navigation bar that is not hidden in my segue… which looks bad…
If I remove the setNavigationBarHidden:animated method I don't see a navigation bar after performing the segue, and the issue doesn't manifest anymore.
- (void) tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath
{
[self.navigationController setNavigationBarHidden:NO animated:YES];
if (indexPath.row == 0) {
[self performSegueWithIdentifier:#"mailSignUp" sender:nil];
} else if (indexPath.row == 1) {
[self performSegueWithIdentifier:#"logIn" sender:nil];
}
}
If you want to hide your navigation bar you have to do it in the root controller, the first controller in your app.
My guess is that you have had setup a modal segue in interface builder from a certain button to the following view. By doing so you have the following view sliding in from down to top.
I'm also guessing you are using the lastest xcode version [4.5.2] and running it on ios6.
Try deleting your segue from interface builder. Also, instead of your:
[self performSegueWithIdentifier:#"mailSignUp" sender:nil];
use:
UIStoryboard *storyBoard = [UIStoryboard storyboardWithName:#"MainStoryboard" bundle:nil];
YourSecondController *secondController = (YourSecondController *)[storyBoard instantiateViewControllerWithIdentifier:#"YourSecondController"];
[self.navigationController pushViewController:yourSecondController animated:YES];
[substitue YourSecondController with mailSignUp or whatever controller you want to perform segue to]
Also, if you want to hide your navigation bar you have to add this line of code in your (void)viewdidload method in your root controller.
If you run your segue programmatically like this, you should achieve your second view slide from right to left. Let me know if this helped or provide more info if it is not sufficient or exact.
I'm trying to make a modal view controller in my app delegate (I created a function called showLoginView). But whenever I try to call it I get a warning in XCode:
Warning: Attempt to present <PSLoginViewController: 0x1fda2b40> on <PSViewController: 0x1fda0720> whose view is not in the window hierarchy!
Here's the method code:
- (void)showLoginView
{
PSLoginViewController *loginViewController = [[UIStoryboard storyboardWithName:#"MainStoryboard" bundle:NULL] instantiateViewControllerWithIdentifier:#"PSLoginViewController"];
[self.window.rootViewController presentViewController:loginViewController animated:NO completion:nil];
}
How can I add the view to the window hierarchy? Or maybe I'm doing something very wrong?
You can't display a modal view controller from the appDelegate. You need to display a modal ViewController from whichever viewController is currently displaying full-screen. In other words, you need to put that code into your root view controller, or whichever one you want to display the modal vc from...
Also, you'll want to use the method "presentModalViewController" to present the modal. You can set properties on the modal vc such as:
vC.modalPresentationStyle = UIModalPresentationFormSheet;
vC.modalTransitionStyle = UIModalTransitionStyleCoverVertical;
[self presentModalViewController:vC animated:YES];
You can actually present a modal view Controller from the AppDelegate as long as you detect the current visible viewController and take care of the case where you current controller is a navigationController.
Here is what I do:
UIViewController *activeController = [UIApplication sharedApplication].keyWindow.rootViewController;
if ([activeController isKindOfClass:[UINavigationController class]]) {
activeController = [(UINavigationController*) activeController visibleViewController];
}
[activeController presentModalViewController:loginViewController animated:YES];
UIViewController *activeController = [UIApplication sharedApplication].keyWindow.rootViewController;
if ([activeController isKindOfClass:[UINavigationController class]])
{
activeController = [(UINavigationController*) activeController visibleViewController];
}
else if (activeController.modalViewController)
{
activeController = activeController.modalViewController;
}
[activeController presentModalViewController:vc animated:YES];
I ran into this problem on iOS 7 - the key to making any of the proposed solutions work was to call
[self.window makeKeyAndVisible];
in your AppDelegate.
After that call, presenting a modal view from the window's rootViewController worked.
Another reason for that warning can be that you want to present a view controller from an instance which is not the top most view controller.
So first you have to get the topmost UIViewController and using this instance to call presentViewController:
UIViewController *root = [UIApplication sharedApplication].keyWindow.rootViewController;
while (root.presentedViewController) {
root = root.presentedViewController;
}
You can NSLog(#"%#", self.window.rootViewController), and see what the rootViewController really is.
I came into this problem, when the rootViewController is a normal UIViewController.
Replace it with a UINavigationController, wish it will help.
Faced this issue while trying to present controller from the call of delegate of other controller . i.e : show search filter with delegate , once done back to my controller and receive data via the delegate then present controller , all I had to do is to dispatch the present code cause while in a delegate you're in another thread , that's why you're presenting on your view from main thread another controller from that other thread , so have to go back to main thread , just put the presenting code like this :
dispatch_async(dispatch_get_main_queue(), ^{
[self presentViewController:searchVC animated:true completion:nil];
});
Hope this helps !
I'm building an app that currently has 3 ViewControllers. One of them is used after a successful login so is not relevant in this question.
I'm using a mixture of Storyboards and building things programmatically when I find Storyboards do not give me the fine control that I need.
The first ViewController is built in my 'MainStoryboard'. It has a login form and an info button at the bottom. I link it up the my AppDelegate by doing the following inside didFinishLaunchingWithOptions:
ViewController *viewController = (ViewController *)self.window.rootViewController;
Because I wanted to force rendering of a UIWebView (another story) I create the second view programmatically. I do the following inside didFinishLaunchingWithOptions:
infoViewController = [[InfoViewController alloc] init];
[infoViewController view];
Inside both of my ViewControllers I setup a link to appDelegate as below:
appDelegate = (AppDelegate *)[[UIApplication sharedApplication] delegate];
I have an info button in my first ViewController that takes you to the infoViewController. It calls the following code when tapped:
appDelegate.infoViewController.modalTransitionStyle = UIModalTransitionStyleFlipHorizontal;
[self presentModalViewController:appDelegate.infoViewController animated:YES];
The above works just fine for me, flips over the screen and shows the InfoViewController.
On my InfoViewController I have a button that should take you back to the login page, I have tried all sorts to get this to work but it just crashes my app. Nothing seems to work. I have tried the following:
appDelegate.viewController.modalTransitionStyle = UIModalTransitionStyleFlipHorizontal;
[self presentModalViewController:appDelegate.viewController animated:YES];
and
[self.navigationController popToRootViewControllerAnimated:YES];
and
[self.navigationController popViewControllerAnimated:YES];
and
[self.navigationController popToViewController:appDelegate.viewController animated:YES];
I suspect the last 3 might be more to do with when you have a navigation view controller and you want to go back to the root? I'm not sure, but either way it does not work. I had this working using storyboards previously so I'm sure it ought to be easy! As mentioned I switched to making the infoViewController programmatically so that I could force the UIWebView to render before the view appeared.
Any help much appreciated.
You can do with:
[self dismissModalViewControllerAnimated:YES];
You should use this.
[self dismissModalViewControllerAnimated:YES];
You should use a main controller for switching between your other view controllers. Change the view of your root controller to one of your other view controllers (apply animations as usual if needed). Hold a pointer to your root controller in your other view controllers and call self.rootController.view = <desired_controller_instance>.view
I think the way you're presenting your InfoViewController is wrong. Do it the following way:
In your ViewController, create an action for the info button.:
- (IBAction)infoButtonTapped:(id)sender
{
InfoViewController *infoViewController = [[InfoViewController alloc] init];
infoViewController.modalTransitionStyle = UIModalTransitionStyleFlipHorizontal;
[self presentModalViewController:infoViewController animated:YES];
}
And in your InfoViewController, in the action of your button that should take you back write this:
- (void)takeBackToViewController
{
[self dismissModalViewControllerAnimated:YES];
}
Hope it works.
Also in presented controller you can use this
if(self.parentViewController)
[self.parentViewController dismissModalViewControllerAnimated:YES];
else
[self.presentingViewController dismissModalViewControllerAnimated:YES];
To dissmiss current controller.
I have a navigation based app with a navigation bar, but there are a few instances where instead of pushing a view controller onto the stack, I need to present the view controller modally. The problem is that when I dismiss the modal view controller, everything functions as expected except that the navigation bar is hidden and the (parent view) has been resized, which is the expected behavior according to the docs. So I figured I could simply call a built-in method to unhide the navigation bar. I have already tried
[self.navigationController setNavigationBarHidden:NO];
as well as the animated version without success.
The documentation talks about this in the method
presentModalViewController: animated:
in the discussion section where it says,
On iPhone and iPod touch devices, the view of modalViewController is always presented full screen" and "Sets the modalViewController property to the specified view controller. Resizes its view and attaches it to the view hierarchy."However, the docs didn't clue me in as to how to undo this process after dismissing a modal view.
Has anyone else experienced this and found a solution?
Edit: I am having this same problem, so instead of asking my own question I am sponsoring a bounty on this one. This is my specific situation:
In my case, I am presenting an Image Picker in a Modal View Controller, over a Navigation Controller:
-(void) chooseImage {
if ([UIImagePickerController isSourceTypeAvailable:UIImagePickerControllerSourceTypePhotoLibrary]) {
imagepicker = [[UIImagePickerController alloc] init];
imagepicker.allowsEditing = NO;
imagepicker.delegate = self;
imagepicker.sourceType = UIImagePickerControllerSourceTypePhotoLibrary;
imagepicker.navigationBar.opaque = true;
imagepicker.wantsFullScreenLayout = NO;
if (UI_USER_INTERFACE_IDIOM() == UIUserInterfaceIdiomPad) {
if (self.view.window != nil) {
popoverController = [[UIPopoverController alloc] initWithContentViewController:imagepicker];
[popoverController presentPopoverFromBarButtonItem:reset permittedArrowDirections:UIPopoverArrowDirectionDown animated:YES];
} else {}
} else {
[self.navigationController presentModalViewController:imagepicker animated:YES];
}
}
}
-(void) imagePickerController:(UIImagePickerController *)picker didFinishPickingMediaWithInfo:(NSDictionary *)info {
if (UI_USER_INTERFACE_IDIOM() == UIUserInterfaceIdiomPad) {
[self.popoverController dismissPopoverAnimated:true];
} else {
[self.navigationController dismissModalViewControllerAnimated:YES];
}
//Save the image
}
-(void) imagePickerControllerDidCancel:(UIImagePickerController *)picker {
if (UI_USER_INTERFACE_IDIOM() == UIUserInterfaceIdiomPad) {
[self.popoverController dismissPopoverAnimated:true];
} else {
[self.navigationController dismissModalViewControllerAnimated:YES];
}
}
Make sure you a presenting AND dismissing the modalViewController from the UINavigationController, like so:
// show
[self.navigationController presentModalViewController:vc animated:YES];
// dismiss
[self.navigationController dismissModalViewControllerAnimated:YES];
If your view controller is actually on the UINavigationController's stack then this is the correct way to handle the presentation and dismissal of the modal view controller. If your UINavigationBar is still hidden, there is something else funky going on and we would need to see your code to determine what is happening.
Edit
I copied your code into an app of mine and the UIImagePickerController successfully presented and dismissed and my UINavigationController's UINavigationBar was still there. I truly believe that the problem lays elsewhere in your architecture. If you upload a zip w/ an example project I will take a look.
Simply try following code it will work
SettingsViewController *settings = [[SettingsViewController alloc] init];
UINavigationController *navcont = [[UINavigationController alloc] initWithRootViewController:settings];
[self presentModalViewController:navcont animated:YES];
[settings release];
[navcont release];
One need to present the navigation controller in order to have navigation bar on the presented controller
I think I've seen this behavior when presenting a view controller on the wrong VC. Are you calling presentModalViewController on the navigation controller or the individual VC?
Try calling it from the navigationController if you aren't already.
[self.navigationController presentModalViewController:myVC animated:YES];
If you present a controller as model, View controller will appear to total view.
If you want to access the navigation controller properties over the model view, You need to create another navigation controller reference and it continues as previous.
This may be useful for you.
Check this out. This is Apple's Documentation under UIViewController Class Reference:
It clearly mentions that modal view always presents in full screen mode, so it is obvious that navigation bar will be hidden. So put the seperate navigation bar on modal view to navigate back.
presentModalViewController:animated:
Presents a modal view managed by the given view controller to the user.
- (void)presentModalViewController:(UIViewController *)modalViewController animated:(BOOL)animated
Parameters
modalViewController
The view controller that manages the modal view.
animated
If YES, animates the view as it’s presented; otherwise, does not.
Discussion
On iPhone and iPod touch devices, the view of modalViewController is always presented full screen. On iPad, the presentation depends on the value in the modalPresentationStyle property.
Sets the modalViewController property to the specified view controller. Resizes its view and attaches it to the view hierarchy. The view is animated according to the transition style specified in the modalTransitionStyle property of the controller in the modalViewController parameter.
Availability
Available in iOS 2.0 and later.
Hope this helps you understand that hiding the whole view along with navigation controller is default behaviour for modal view so try putting a seperate navigation bar in modal view to navigate.
You can check it further on this link
http://developer.apple.com/library/ios/#documentation/uikit/reference/UIViewController_Class/Reference/Reference.html
AddContactVC *addController =[self.storyboard instantiateViewControllerWithIdentifier:#"AddContactVC"];
UINavigationController *navigationController = [[UINavigationController alloc]initWithRootViewController:addController];
[self presentViewController:navigationController animated:YES completion: nil];
working for me shows navigation bar
Emphatic and Devin –
As I started reading through the Apple docs to get familiar with the problem, I noticed that the method you're using, presentModalViewController:animated:, appears to be deprecated in favor of presentViewController:animated:completion:. Perhaps you should try to use that method instead.
For your convenience, take a look for yourself:
presentModalViewController:animated: reference
I'll try to put together a quick test program to see whether what I've said above is actually true. But give it a shot – maybe it'll help!
Xcode has a template that does pretty close to what you're doing. from the results, i don't think you should be attempting to perform [self.navigationController presentModalViewController:vc] and [self.navigationController dismissModalViewControllerAnimated:] , but rather simply [self presentModalViewController:] and [self dismissModalViewControllerAnimated:] .
to see how the template does this for yourself, you can use the new project wizard in xcode 4.3 . perhaps it will provide some guidance:
from that choice, choose Next, then give your test project a name, choose "Universal", turn off automatic reference counting, hit next, save where you want it.
now, click on the target and switch the deployment target to 4.3 (or 4.0 if you prefer) for your testing purposes, and switch to your device or the iOS 4.3 simulator .
finally, substitute the following code in applicationDidFinishLaunching:withOptions: in the created AppDelegate.m:
self.window = [[UIWindow alloc] initWithFrame:[[UIScreen mainScreen] bounds]];
// Override point for customization after application launch.
if ([[UIDevice currentDevice] userInterfaceIdiom] == UIUserInterfaceIdiomPhone) {
self.mainViewController = [[[MainViewController alloc] initWithNibName:#"MainViewController_iPhone"
bundle:nil] autorelease];
} else {
self.mainViewController = [[[MainViewController alloc] initWithNibName:#"MainViewController_iPad"
bundle:nil] autorelease];
}
UINavigationController* navigationController
= [[UINavigationController alloc] initWithRootViewController:self.mainViewController];
self.window.rootViewController = navigationController;
[self.window makeKeyAndVisible];
return YES;
now, when i run this, it doesn't hide the navigationBar. and in the created MainViewController.m from the template, you'll see how it presents the modal view controller and dismisses it from the controller itself and not from the navigation controller. for good measure, to make the template code more like your own, go into MainViewController.m and delete the line that sets the modal view controller transition style ...
(of course, in iOS 5, with storyboards, the same thing can all be accomplished with modal segues ... which is how i've done this for apps that i'm not supporting for pre-5.0 that present a modalViewController in this fashion.)
One of the best solution it to use this Category MaryPopin
https://github.com/Backelite/MaryPopin
I'm trying to create another UINavigationBar in my project, but it seems that I'm missing some key detail. When the application first loads, it does have it's own navigation system, but now I'm trying to add another navigation to a modal.
Many tutorials show you need to connect the view to the [self window], which only seems to work in the AppDelegate files, but when I've tried placing the code* in viewDidLoad, I can never seem to build without any errors.
I've seen this in multiple apps, but how is this done (programmatically or with IBuilder)?
Thanks!
Example code I've tried in viewDidLoad
UINavigationController *navigationController = [[UINavigationController alloc] initWithRootViewController:[self viewController]];
[self.window addSubview:navigationController.view];
You don't show enough code to be able to understand how you do it, but it seems to me that you are showing a controller modally, then trying to add as a subview to its view a navigation controller.
You can try and directly push modally your navigation controller (from your app delegate or where it makes sense for your app):
(IBAction) navigateToSecondaryViewController {
if (secondaryViewController == nil) {
informationTableViewController = [[SecondaryViewController alloc]
initWithNibName:#"SecondaryViewController"
bundle:[NSBundle mainBundle]];
secondaryViewController.delegate = self;
}
if (navController == nil) {
navController = [[UINavigationController alloc]
initWithRootViewController:secondaryViewController];
}
[self presentModalViewController:navController animated:YES];
}
Full example here.