I have a ConnectionViewController and when i click on the Test button, i would like to switch for a tabViewController.
In my ConnectionViewController :
- (IBAction)testButton:(id)sender {
TabBarViewController *tabBarViewController = [[TabBarViewController alloc] init];
[self presentViewController:tabBarViewController animated:YES completion:nil];
}
but when i click on my test button, the TabBarView is black, without anything.
What could i do to fix that ? I would like a modal segue, not a push.
Thx a lot
[EDIT] : The solution is to create a custom segue with a class like CustomSegue.m with this method :
-(void) perform {
ConnectionViewController *src = (ConnectionViewController*) self.sourceViewController;
TabBarViewController *dest = (TabBarViewController*) self.destinationViewController;
[UIView transitionWithView:src.navigationController.view duration:0.2 options:UIViewAnimationOptionTransitionFlipFromLeft animations:^{
[src presentViewController:dest animated:YES completion:NULL];
}
completion:NULL];
}
The reason why the tab bar controller is black is that it does not have any viewControllers to present. You need to set tabBarController.viewControllers property before you present it. Lets say you want to present a tabBarViewController with viewController1 on the first tab and viewController2 on the second tab.
tabBarViewController.viewControllers = #[viewController1, viewController2];
Related
I have two different scenarios that call the same uiviewcontroller,
scenario 1:
in the main uiviewcontroller clicking a button creates a dummy navigator and present it like this:
UINavigationController* dummyNavigation = [[UINavigationController alloc]init];
[dummyNavigation addChildViewController:bViewController];
[self presentViewController:dummyNavigation animated:NO completion:NULL];
scenario 2:
in the main uiviewcontroller clicking a button open a uitableviewcontroller in it every click on a row open bViewController like this:
[self.navigationController pushViewController:bViewController animated:NO];
I've set the navigation bar of bViewController to hidden
[self.navigationController setNavigationBarHidden:YES];
and created a button to replace the back button of the navigation with this code
[self dismissViewControllerAnimated:YES completion:NULL];
the problem: in both scenarios the back button code returns to the main uiviewcontroller but in scenario 2 its expected to return to the uitableviewcontroller
Check when dismissing, if it is in a navigation controller then pop otherwise dismiss.
if (self.navigationController) {
[self.navigationController popViewControllerAnimated:YES];
} else {
[self dismissViewControllerAnimated:YES completion:nil];
}
I have a UINavigationController ans a chain of 3 simple controllers. Each one has a button. When press a button a next controller is Pushed. ViewController1 -> ViewController2 -> ViewController3. When I push a back button on the 3rd view i want to move to the first view. Using of backBarButtonItem is obligatory. Here is the code for second controller:
#import "ViewController2.h"
static BOOL isBackButtonPressed;
#implementation ViewController2
- (void)viewDidLoad {
self.navigationItem.backBarButtonItem = [[UIBarButtonItem alloc]initWithTitle:#"back from 3" style:UIBarButtonItemStyleBordered target:nil action:nil];
[super viewDidLoad];
}
- (void)viewWillAppear:(BOOL)animated {
if (isBackButtonPressed) {
[self.navigationController popViewControllerAnimated:YES];
} else {
isBackButtonPressed = YES;
}
[super viewWillAppear:animated];
}
#end
But when I press back button on the third view I return to the second view instead of the first view. Could you help me to return to the first view pressing back button on the third view.
I tried suggestions from answers but they don't help.
Adding a selector to backBarButtonItem doesn't help because it is never called.
Adding a [self.navigationController popToRootViewControllerAnimated:YES] in viewWillDisappear methos also doesn't work. I don't know why. I think that the actual problem is how backBarButtonItem works.
Any other suggestions?
The behaviour I try to achieve exists in the calendar on iPhone. When you rotate iPhone to landscape you get to the weeek view. Then go to the event details, and rotate to the portrait. When you press back button you will get to a day view not to a week view, so a controller with weekview is skipped.
After countless number of tries my solution was simply not use backBarButtonItem! As whatever i do it always goes to previous viewController instead of calling its selector
Instead I use only leftBarButtonItem for navigation, as it guarantees calling my action.
Here an example
UIButton *backButton = [[UIButton alloc] initWithFrame:CGRectMake(0, 0, 27, 22)];
[backButton setImage:[UIImage imageNamed:#"backbutton"] forState:UIControlStateNormal];
[backButton addTarget:self action:#selector(backButtonPressed:) forControlEvents:UIControlEventTouchUpInside];
self.navigationItem.leftBarButtonItem = [[UIBarButtonItem alloc] initWithCustomView:backButton];
This certainly calls backButtonPressed action.. This works both for IOS 6 and 7
No need to register a new selector for the back button, just do:
-(void)viewWillDisappear{
if ( [self.navigationController.viewControllers containsObject:self] )
//It means that the view controller was popped (back button pressed or whatever)
//so we'll just pop one more view controller
[self.navigationController popViewControllerAnimated:NO];
}
in your ViewController3 viewWillDisappear method
Try using this in your third view controller, this way you check if you have pressed the back button and directly pop to the root view controller which as you stated is your first view controller.
-(void) viewWillDisappear:(BOOL)animated {
if ([self.navigationController.viewControllers indexOfObject:self]==NSNotFound) {
[self.navigationController popToRootViewControllerAnimated:YES];
}
[super viewWillDisappear:animated];
}
I had the same problem as you beofre and fixed it like this:
You can capture the back button on the ViewController3 and before poping the view, remove ViewController2 from the navigation stack like this:
- (void)viewDidLoad {
[super viewDidLoad];
self.navigationItem.backBarButtonItem = [[UIBarButtonItem alloc]initWithTitle:#"back from 3" style:UIBarButtonItemStyleBordered target:self action:#selector(customBackPressed:)];
}
-(void)customBackPressed:(id)sender {
NSMutableArray *allViewControllers = [NSMutableArray arrayWithArray: navigationController.viewControllers];
for (UIViewController *vc in viewControllers)
{
// If vc is ViewController2 type, remove it
}
navigationController.viewControllers = allViewControllers;
[self.navigationController popViewControllerAnimated:YES];
}
Because ViewController2 is not in the stack anymore, it will jump to ViewController1.
Also, if ViewController1 is the root view controller, you can just do:
[self.navigationController popToRootViewControllerAnimated:YES];
When I'm going back from my Modal View Controller to my Main View Controller (I have a horizontal animation) my Main Controllers navbar places itself a bit too high for a quick second and then jumps back to its right position. Does somebody know why? Ive been googling it but with no success.
App Delegate:
[navigationController.navigationBar setBarTintColor: [UIColor whiteColor]];
[navigationController.navigationBar setTranslucent: NO];
When i push button to open my Info View:
UIViewController *infoViewController;
infoViewController = [[InfoViewController alloc] initWithNibName:#"InfoViewController" bundle: nil];
infoViewController.modalTransitionStyle = UIModalTransitionStyleFlipHorizontal;
[self presentViewController: infoViewController animated: YES completion:nil];
I'm not using Auto Layout on any xib-files. My Main View Controller xib-file is empty with Status Bar: Default. My Info View Controller xib-file has some stuff in it.
Code for closing my Modal View Controller:
-(IBAction)onBackBtnClick:(id)sender
{
[self dismissModalViewControllerAnimated: YES];
}
All what you have to do is to add the following code in the ViewWillAppear of the "InfoViewController" viewController class
-(void) viewWillAppear:(BOOL)animated{
[super viewWillAppear:animated];
[self.navigationController.navigationBar setTranslucent:NO];
[self.navigationController.navigationBar.layer removeAllAnimations];
}
Hope it worked with you :)
The problem seems to be
infoViewController.modalTransitionStyle = UIModalTransitionStyleFlipHorizontal;
If you change this to
infoViewController.modalTransitionStyle = UIModalTransitionStyleCoverVertical;
then it will no longer jump. This worked for me. Good luck!
I have UIViewControllers A and B, they are allocated in AppDelegate. I need to apply transition to them. How to transit them without reallocating and replacing UIViews?
This code calls from my UIBarButtonItem in UINavigationController:
[UIView transitionFromView:self.view //UIViewController A
toView:appDelegate.secondViewController.view //UIViewController B
duration:0.5
options:UIViewAnimationOptionTransitionFlipFromLeft
This method replaces UIViews in my UIViewControllers, and I can transit them back, or just don't know how to do that. Can you tell me how to do this?
If you're in iOS 5 world and want to jump between various view controllers, you might want to pursue View Controller Containment. Or check out WWDC 2011 session 102.
View controller containment basically assumes that you have some parent view controller which is governing the navigation between multiple child controllers. In your case, the parent view would be one with the navigation bar with the button on it.
Update:
If you pursue containment, you could create a parent view controller that has a nav bar with the button on it. When you load that view, you can add the first child view. Thus viewDidLoad might look like:
- (void)viewDidLoad
{
[super viewDidLoad];
// this is my model, where I store data used by my view controllers
_model = [[MyModel alloc] init];
// let's create our first view controller
OneViewController *controller = [[OneViewController alloc] initWithNibName:#"OneViewController" bundle:nil];
// pass it our model (obviously, `model` is a property that I've set up in my child controllers)
controller.model = _model;
// let's put the new child in our container and add it to the view
[self addChildViewController:controller];
[self configureChild:controller];
[self.view addSubview:controller.view];
[controller didMoveToParentViewController:self];
// update our navigation bar title and the label of the button accordingly
[self updateTitles:controller];
}
The configureChild just does final configuration. As a matter of convenience, I frequently will have a UIView that I've set up in IB (in this case, called childView) which I use for setting up the frame, which gets me out of the world of manually creating frames, but you can do it any way you want:
- (void)configureChild:(UIViewController *)controller
{
// configure it to be the right size (I create a childView in IB that is convenient for setting the size of the views of our child view controllers)
controller.view.frame = self.childView.frame;
}
This is the action if you touch the button in the navigation bar. If you're in the first controller, set up the second controller. If you're in the second controller, set up the first one:
- (IBAction)barButtonTouchUpInside:(id)sender
{
UIViewController *currentChildController = [self.childViewControllers objectAtIndex:0];
if ([currentChildController isKindOfClass:[OneViewController class]])
{
TwoViewController *newChildController = [[TwoViewController alloc] initWithNibName:#"TwoViewController" bundle:nil];
newChildController.model = _model;
[self transitionFrom:currentChildController To:newChildController];
}
else if ([currentChildController isKindOfClass:[TwoViewController class]])
{
OneViewController *newChildController = [[OneViewController alloc] initWithNibName:#"OneViewController" bundle:nil];
newChildController.model = _model;
[self transitionFrom:currentChildController To:newChildController];
}
else
NSAssert(FALSE, #"Unknown controller type");
}
This does the basic transition (including the various containment related calls):
- (void)transitionFrom:(UIViewController *)oldController To:(UIViewController *)newController
{
[self addChildViewController:newController];
[self configureChild:newController];
[self transitionFromViewController:oldController
toViewController:newController
duration:0.5
options:UIViewAnimationOptionTransitionCrossDissolve
animations:^{
[self updateTitles:newController];
}
completion:^(BOOL finished){
[oldController willMoveToParentViewController:nil];
[oldController removeFromParentViewController];
[newController didMoveToParentViewController:self];
}];
}
This method just sets up the title in the nav bar in our parent view controller based upon which child is selected. It also sets up the button to reference the other controller.
- (void)updateTitles:(UIViewController *)controller
{
if ([controller isKindOfClass:[OneViewController class]])
{
self.navigationItemTitle.title = #"First View Controller"; // current title
self.barButton.title = #"Two"; // title of button to take me to next controller
}
else if ([controller isKindOfClass:[TwoViewController class]])
{
self.navigationItemTitle.title = #"Second View Controller"; // current title
self.barButton.title = #"One"; // title of button to take me to next controller
}
else
NSAssert(FALSE, #"Unknown controller type");
}
This all assumes you are going to create and destroy controllers as you jump between them. I generally do this, but use a model object to store my data so I keep whatever data I want.
You said you don't want to do this "without reallocating and replacing UIViews": If so, you can also change the above code to create both child view controllers up-front and change the transition to be simply jump between them:
- (void)viewDidLoad
{
[super viewDidLoad];
// this is my model, where I store data used by my view controllers
_model = [[MyModel alloc] init];
// let's create our first view controller
_controller0 = [[OneViewController alloc] initWithNibName:#"OneViewController" bundle:nil];
_controller0.model = _model;
[self addChildViewController:_controller0];
[self configureChild:_controller0];
[_controller0 didMoveToParentViewController:self];
// let's create our second view controller
_controller1 = [[OneViewController alloc] initWithNibName:#"OneViewController" bundle:nil];
_controller1.model = _model;
[self addChildViewController:_controller1];
[self configureChild:_controller1];
[_controller1 didMoveToParentViewController:self];
// let's add the first view and update our navigation bar title and the label of the button accordingly
_currentChildController = _controller0;
[self.view addSubview:_currentChildController.view];
[self updateTitles:_currentChildController];
}
- (void)transitionFrom:(UIViewController *)oldController To:(UIViewController *)newController
{
[self transitionFromViewController:oldController
toViewController:newController
duration:0.5
options:UIViewAnimationOptionTransitionCrossDissolve
animations:^{
[self updateTitles:newController];
}
completion:^(BOOL finished){
_currentChildController = newController;
}];
}
- (IBAction)barButtonTouchUpInside:(id)sender
{
UIViewController *newChildController;
if ([_currentChildController isKindOfClass:[OneViewController class]])
{
newChildController = _controller1;
}
else if ([_currentChildController isKindOfClass:[TwoViewController class]])
{
newChildController = _controller0;
}
else
NSAssert(FALSE, #"Unknown controller type");
[self transitionFrom:_currentChildController To:newChildController];
}
I've seen it both ways, so you can do whatever works for you.
please see here. You basically want to implement UIViewController containment which is a new feature in iOS5. The link provided above provides some code and a link to a github project.
Good luck
t
I found solution for my problem. This code works on iOS 4.x
[UIView beginAnimations:#"transition" context:nil];
[UIView setAnimationDuration:1.0];
[UIView setAnimationTransition:UIViewAnimationTransitionCurlDown
forView:self.navigationController.view
cache:NO];
[self.navigationController
pushViewController:self.alternateView animated:NO];
[UIView commitAnimations];
try
UIViewController* controller1;
UIViewController* controller2;
[controller1 transitionFromViewController:controller1 toViewController:controller2 duration:0.5f options:0 animations:nil completion:nil];
or
if on top of navigationtroller - controller1 then
UINavigationController* nav;
[nav pushViewController:controller2 animated:YES];
I have an app with a tab bar controller (2 tabs). In one tab view controller, a button leads to an alert window. I want one button of the alert window to call a table view containing possible answers. I want that table view to have a done button and a title. I think that means a navigation controller has to be used. But most everything I can find on navigation controllers assumes a much more complicated situation. Here's part of the alert window logic:
-(void) alertView:(UIAlertView *)alertView clickedButtonAtIndex:(NSInteger)buttonIndex
{
if (buttonIndex == 2) {
AnswersViewController *aVC = [[AnswersViewController alloc] init];
[self presentViewController:aVC
animated:YES
completion:NULL];
}
}
And AnswersViewController looks like this:
#interface AnswersViewController : UITableViewController
#end
#implementation AnswersViewController
- (id) init
{
self = [super initWithStyle:UITableViewStylePlain];
return self;
}
- (id) initWithStyle:(UITableViewStyle)style
{
return [self init];
}
- (void)viewDidLoad
{
[super viewDidLoad];
[[self view] setBackgroundColor:[UIColor redColor]];
}
#end
This code all works as expected (an empty red UITableView appears).
Two questions I guess: 1. Is there a simple modification to what I have that can give me a done button and title in my table view? 2. If I have to go to a navigation controller (probably), how can I make a bare-bones navigation controller with a done button and title and embed the table view within it? Oh, and I want to do this programatically. And I think I prefer the done button and title to be in the navigation bar, no tool bar desired. Thanks!
To get what you are looking for, you do need to use a UINavigationController. That will provide the UINavigationBar where you can display a title and also buttons.
To implement this with a UINavigationController, you want to do smoothing like this (assuming you are using ARC, so you don't need to worry about memory management):
-(void) alertView:(UIAlertView *)alertView clickedButtonAtIndex:(NSInteger)buttonIndex
{
if (buttonIndex == 2) {
AnswersViewController *aVC = [[AnswersViewController alloc] init];
//Make our done button
//Target is this same class, tapping the button will call dismissAnswersViewController:
aVC.navigationItem.leftBarButtonItem = [[UIBarButtonItem alloc] initWithBarButtonSystemItem:UIBarButtonSystemItemDone target:self action:#selector(dismissAnswersViewController:)];
//Set the title of the view controller
aVC.title = #"Answers";
UINavigationController *aNavigationController = [[UINavigationController alloc] initWithRootViewController:aVC];
[self presentViewController:aNavigationController
animated:YES
completion:NULL];
}
}
Then you would also implement - (void)dismissAnswersViewController:(id)sender in the same class as the UIAlertView delegate method (based on the implementation I have here).
Hope this helps!