I am working with a navigation application. I have a homeViewController with two views(accept, service). When I click on a button in serviceView it should go to acceptView. I should have back button in navigation bar which takes me be back to serviceView from acceptView. When I am trying to use [self navigationController pushViewController, it only accepts viewcontroller but not view. Can any one please tell the alternative. Please help me.
Thanks in advance
You should have a different viewController for each view if you wish to use a navigationController properly.
Set up AcceptViewController and ServiceViewController separately. Then, from the AcceptViewController, you can create a ServiceViewController and push it onto the stack as follows:
-(void)showServiceView {
ServiceViewController *serviceViewController = [[ServiceViewController alloc] init];
[self.navigationController pushViewController:serviceViewController];
[serviceViewController release];
}
Assuming you've references to both acceptView and serviceView, you can just make this work by removing one as the subview and adding the other one as the subview of homeViewController's view. Something like,
[serviceView removeFromSuperview];
[self.view addSubview:acceptView];
for moving to acceptView. Switch them if you want to come back. However this mechanism will be abrupt. Use UIView's transitionFromView:toView:duration:options:completion: method to animate the transition. Something like,
[UIView transitionFromView:serviceView
toView:acceptView
duration:0.5f
options:UIViewAnimationOptionTransitionFlipFromLeft| UIViewAnimationOptionCurveEaseInOut
completion:NULL];
This will remove serviceView and add acceptView as the subview along with a transition to go by.
Related
I'm very new to xCode and objective-C so I wanted to make a simple textRPG.
I'm currently making a character creation process consisting of 4 xib-files. The only way I got switching views to work was to look at the utility-template. Problem is, now I have the first screen being the delegate for the second screen, being the delegate for the third screen etc. So by the end of the character creation process I can't dismiss the views because that just "steps back" through the views.
When I've searched around for a solution I've found a addSubview-method but it seems like that makes a new view, like, empty to arrange programmatically.
All I need is a simple way to switch from one loaded xib to another xib. Have I misunderstood addSubview or do I need something completely different?
(If it helps: I've worked with VB for several years, in case you notice that I missed some kind of concept concerning views and such)
Thanks in advance! :)
Use this code. It is really simple and works well.
View *view = [[View alloc] initWithNibName:#"xibNameGoesHere" bundle:nil];
view.modalTransitionStyle = UIModalTransitionStyleFlipHorizontal;
[self presentViewController:view animated:YES completion:nil];
This will switch to another xib file and the two views won't own one another. I am using it in my own game right now.
#Joakim Ok, this is the way I do it. I have a class called RootViewController : UIViewContoller, whose view I add directly to the window. Then I make a subclass of UIView i.e. MyView. All of my views then subclass MyView. I also make an enum for all my views. In RootViewController you should have a switchView:(int)view method that looks something like this:
-(void) switchView:(myView) view
{
[_currentView removeFromSuperview];
switch(view)
{
case titleView:
_currentView = [[TitleView alloc] initWithRoot:self];
break;
case homeView:
_currentView = [[HomeView alloc] initWithRoot:self];
break;
default: break;
}
[self.view addSubview:_currentView];
[_currentView release];
}
in #interface RootViewContoller define MyView *_currentView;
TitleView and HomeView both subclass MyView and have a common method -(id)initWithRoot:(RootViewController*) rvc.
To switch between views use [_rvc switchView:homeView];
Hope this helps :)
It is called UINavigationController. Idea is
1) You push corresponding 'next' controller into navigation controller each time user submits current screen. Bonus - you'll get 'back' button for free on each step of character creation.
2) After character is created you pop all character creation controllers from stack.
Please read View Controller Programming Guide for iOS before trying to 'switch views' and such. You'll save tons of time and nerves.
another idea is not to use interface builder at all. i have been working with iphone apps for two years now and found that interface builder really prolongs the time to actually make something. make your own root controller and think about the logic you need to navigate through the views.
I have a viewcontroller, where I load subviews on. In those subviews I have a UIButton which will show a modalViewController. If I call the function on the main viewcontroller, I get the modal exactly in the middle as I want them to be, but if I call the exact same method in the view I've added as a subview the modal is presented somewhere on the right side of the screen. So now is my question: how can I present the modal on the super view instead? Or how do I put the modalview in center? Because the views I've added as subviews contains data which the modalpopup needs.
This is how I present the modal:
MapViewer *map = [[MapViewer alloc] init];
map.modalPresentationStyle = UIModalPresentationFormSheet;
[self presentModalViewController:map animated:YES];
[map release];
Hope somebody can help me with this.
Thanks in advance!
Edit:
Maybe useful to be more clear:
AppDelegate.m
-> MainWindow.m
-> OtherViewController.m
So I add an x amount of OtherViewControllers as subviews to MainWindow. The OtherViewController contains the function mentioned above. But the map needs to be displayed as a modal on the MainWindow, and not on the OtherViewController so it gets nicely centered etc.
One thing you might do is set the target of the UIButton object to the main view controller using setTarget:action: method.
Ok I've managed to get it working using the notificationcenter so I can call a method on the MainWindow from other views. So if anyone is asking the same question, have a look at the notificationcenter :D
Fairly new to the coding community and took over an app from my developer. I want to implement a Back button on the navigation bar of one of the views in my app. If you guys could point me in the right direction, that'd be greatly appreciated.
Thanks very much!
in some scenarios, where you are not using an UINavigationController, you can create a UINavigationBar yourself.
self.navBar = [UINavigationBar new];
self.navBar.contentMode = UIViewContentModeTopLeft;
self.navBar.delegate = self;
self.navBar.frame = CGRectMake(0, 30, mainWindow.frame.size.width,40);
UINavigationItem *backButton = [[UINavigationItem alloc] initWithTitle:#"Back"];
[self.navBar setItems:[NSArray arrayWithObjects:backButton,[[UINavigationItem alloc] initWithTitle:#"Current View"], nil]];
[self.view addSubview: self.navBar];
Your controller should then implement the UINavigationBarDelegate protocol, so that you can respond to
-(BOOL) navigationBar:(UINavigationBar *)navigationBar shouldPopItem:(UINavigationItem *)item
where you can go back to your previous view.
There is mostly no use-case for this. You'll probably really want to work with UINavigationControllers and the push- and popViewController methods.
I hope this helped anyway.
kind regards.
The back button is added automatically when you use [UINavigationController -pushViewController]. Basically, instead of having a regular view controller, you need a navigation controller that is initialized with the default view, and when you want to show the other view, you need to push it on the navigation controller. By pushing the new view controller, it automatically adds the back button. The title of the back button is typically the title of the view controller, but you can change it with navigationBar.backItem.title.
Im new to iPhone development and I have really taken this to me. I love it, but there is one thing thats naggin' me. How do I keep switching view? I know how to come from first view that is given to me when I create a new project, to a view that I make, but how do I get passed this two windows? How do I get from to views that I created?
I have this app which have a main window with a NavigationController whih is feed with a UITableViewController. This is my main menu. I have a in the upper right corner, a "+"-button which gives me a new view, but how do I get a new view from here? How do I push a new view when the user pick something to add?
Hope someone understand my question. A link to some documentation would be fine. I have looked everywhere.
You can do this many diffrent way, you can do what the Sebastian said, you can also have a common RootViewController that manages your other view controllers view. This is what I like to do, I actually define a protocol on the RootViewController something like ToggleView:UIViewController newController UIViewController:oldController. I make any UIViewController that i want to be able to switch from that view to another implement this protocol. This makes since because generally when you click on a button, you know what View you want to go to next. So when a user clicks the button, in the UIViewController that owns the button i create the new ViewController whose view i want pushed into the screen, this is nice because it also allows me to set up data in the view controller and not have to delegate it to some other object or use a singleton to get the data in the new view, then i call my toggleView methods and the root view controller does the switching. I find this works pretty well and theres berely any code involved. I dont always u se this though, if I know a new view will always come out of another particular view, (for example a home page where one views events and creation of those events), in this case I will loosly couple the view controllers by using protocols.
For that particular situation, people usually use the presentModalViewController:animated: method of UIViewController. UINavigationController is a subclass of UIViewController, so your code would look something like this:
UIViewController *addingViewController = [[UIViewController alloc] initWithNibName:#"AddingView" bundle:nil];
[[self navigationController] presentModalViewController:addingViewController animated:YES];
[addingViewController release];
Here is the rootviewcontrollerdelegate definition
#protocol RootViewControllerViewDelegate
-(void)toggleView:(UIViewController )newController viewController:(UIViewController)oldController;
#end
a possible implementation to toggleView
-(void)toggleView:(UIViewController *)newController viewController:(UIViewController*)oldController {
[UIView beginAnimations:nil context:NULL];
[UIView setAnimationDuration:1];
[UIView setAnimationTransition:([oldController.view superview] ? UIViewAnimationTransitionFlipFromLeft : UIViewAnimationTransitionFlipFromLeft) forView:self.view cache:YES];
[newController viewWillAppear:YES];
[oldController viewWillDisappear:YES];
[oldController.view removeFromSuperview];
[self.view addSubview:newController.view];
[oldController viewDidDisappear:YES];
[newController viewDidAppear:YES];
[UIView commitAnimations];
[oldController release];
}
This will swipe the view controllers by flipping the view
Obviously you must make a new RootViewController somewhere and start with a view there, (could be the app delegate)
Now if you want a ViewController to be able to use the RootViewController it must conform to the protocol, you declare it in that classes interface like so
#interface MyViewController : UIViewController <RootViewControllerDelegate> {
id delegate;
}#property(assign) id <RootViewControllerViewDelegate> delegate;
Now you can use the delegates method to swap a view for another given that everything has been initialized right. the code to swap two controllers view could look like this
NewViewController *viewController=...
//you can set up your viewControllers data here if you need to
//Since its probable that this view has that data it can just set it instead of
//delegating
viewController.delegate=delegate; //setting up the RootViewController reference
[delegate toggleView:viewController viewController:self];
remember on the toggleView call back to release the old ViewController, if you dont youll get a leak since you lose all reference to that controller.
I'd like to have a view appear when the user clicks a button. The hierarchy I have looks like this:
MainWindow
-UIView
--ScrollView
---ScrollView.pages = UIViews
----UIView (from above assignment)
----TextView
----InfoButton
pages is an NSMutableArry of pageController objects. These hook to a nib. These nibs are the pages that user flicks through in the scroll view.
The InfoButton click is wired up like this:
- (IBAction) infoButton_click:(id)sender{
topView topViewViewController *topView = [[topViewViewController alloc] initWithNibName:#"TopView" bundle:[NSBundle mainBundle]];
//[self.navigationController pushViewController: topViewView animated:YES];
//[self.view addSubview: topViewView.view];
[super.view addSubview: topViewView.view];
[topViewView release];
}
InfoButton is on one of the pages in the ScrollView. I've commented out different code that has been tried. None of it adds the view. Nothing happens. Is there a way to get TopView as the top view in the hierarchy?
Is your goal to add the view as a subview, or to slide on a new view using the navigation controller? I'm going to assume the latter for the moment.
- (IBAction)infoButton_click:(id)sender
{
TopViewController *topViewController = [[TopViewController alloc] initWithNibName:#"TopView" bundle:nil];
[self.navigationController pushViewController:topViewController animated:YES];
[topViewController release];
}
This is correct if you actually have a navigationController. Make sure you actually do. When "nothing happens" in Cocoa, it usually means something is nil. You should check in the debugger or with NSLog() to see if any of these values are nil. It is possible (even likely), that your parent has a navigationController, but you do not.
Classes should always have a leading capital. Do not create a variable called "view" that is of class "UIViewController". This is a sure path to suffering. Objective-C is a dynamic language with limited compiler checks on types. Naming things correctly is critical to effective programming in ObjC.
Based on your comment to a previous answer, you want to present a modal view. You do this by creating a new view "modalView" and calling [topView presentModalViewController:modalView animated:YES].
In a future version of the iPhone OS, which of course I would be unable to comment upon if it were under NDA, you might be able to present a modal view controller with a flip transition by setting a property on the view controller to be presented, which would probably be called modalTransitionStyle or somesuch.