I'd like to display a ModalViewController from a bar button in the MainWindow.xib file. How would I do this? The basic code I'm looking to use is this:
-(IBAction)add {
myCustomViewController *add = [[myCustomViewController alloc] initWithNibName:#"myCustomViewController" bundle:nil];
[self presentModalViewController:add animated:YES];
[add release];
}
But where do I put it?
EDIT: I figured it out, in my navigation controller i put the following code in viewDidLoad:
UIBarButtonItem *addbutton = self.navigationItem.leftBarButtonItem;
[addbutton setTarget:self];
[addbutton setAction:#selector(add)];
and changed the function to:
- (void)add {
myCustomViewController *add = [[myCustomViewController alloc] initWithNibName:#"myCustomViewController" bundle:nil];
[self presentModalViewController:add animated:YES];
[add release];
}
Thanks for your help, Parth!
I fear that this is not possible.
You will have to put a viewController inside MainWindow.xib and put button on that viewController because you cannot add controls (like button in your case) on UIWindow.
It is required to be of type UIViewController or UITableViewController for you to be able to add UIControls to it.
Hope this helps you.
Related
When pressing infobutton it is not displaying ModalView
UIBarButtonItem *infoItem = [[UIBarButtonItem alloc]
initWithTitle:#"Info"
style:UIBarButtonItemStyleBordered
target:self
action:#selector(displayModalView:)];
- (void)displayModalView
{
self.window = [[UIWindow alloc] initWithFrame:[[UIScreen mainScreen] bounds]];
self.viewController = [[Infoviewcontroller alloc] init];
UINavigationController *navigationController=[[UINavigationController alloc] init];
navigationController.navigationBar.tintColor = [UIColor brownColor];
[navigationController pushViewController:_viewController animated:YES];
[_window addSubview:navigationController.view];
self.window.rootViewController = self.viewController;
[self.window makeKeyAndVisible];
}
Anyone can help me please what is the problem in this.
Thanks a lot in advance for helping me out
In your question you didn't specify how you created your objects (the toolBar and the buttons on it), are you creating them from Xcode by dragging and dropping or from pure code, therefore I will try to point out the common issues for both cases.
First, I am assuming that you are using Xcode and dragging the components that you like. In this case you need to create in the .h file an Outlet that will be linked to the button on the bar as follows:
#interface yourViewController : UIViewController
{
UIBarButtonItem *barButton;
}
#property (nonatomic, retain) IBOutlet UIBarButtonItem *barButton;
- (void) barButtonPress;
Notice that I added a function that will handle the bar button press. Now you need to link this Outlet to the bar button item, simply in Xcode in the Connection Inspector where it says New Referencing Outlet drag to the File's Owner box (the yellow cube).
Now in the viewDidLoad add the following:
[barButton setTarget:self];
[barButton setAction:#selector(barButtonPress)];
This code will link your bar button to the function that you want to be called when you press it. Now for the view that you like to view Modal, I assume that you already #import it also in the .h file, lets call it MyViewModal.
Inside the function that will be called when you press the bar button:
- (void) barButtonPress
{
MyViewModal *myViewModal = [[MyViewModal alloc] initWithNibName:#"MyViewModal" bundle:nil];
[self presentModalViewController:myViewModal animated:YES];
}
That's all, it will be displayed in Modal View. Keep in mind the allocating the new view is done based on your needs, here I did the simplest case just for illustration.
UPDATE: If not using Xcode
If you are not using Xcode then you should have a toolbar already defined say it is named myToolBar. To add buttoms to the tool bar we use the myToolbar.items way therefore we need to prepare the buttons with their targets before adding them. Here is a workflow:
UIButton *infoButton = [UIButton buttonWithType:UIButtonTypeInfoLight];
[infoButton addTarget:self action:#selector(barButtonPress) forControlEvents:UIControlEventAllEvents]; //same function as above
UIBarButtonItem *btn = [[[UIBarButtonItem alloc] initWithCustomView:infoButton] autorelease];
myTool.items = [NSArray arrayWithObjects:btn, nil];
This should do it for you.
Have tried all the examples on this website I just don't see anything on my modal view, I do see the navigationbar though but its empty
EditEntityViewController *editEntityViewController = [[EditEntityViewController alloc] init];
editEntityViewController.currentNode = newNode;
editEntityViewController.delegate = self;
UINavigationController *navController = [[UINavigationController alloc] initWithRootViewController:editEntityViewController];
navController.modalPresentationStyle = UIModalPresentationFormSheet;
navController.modalTransitionStyle = UIModalTransitionStyleFlipHorizontal;
UIBarButtonItem *anotherButton = [[UIBarButtonItem alloc] initWithTitle:#"Show"
style:UIBarButtonItemStylePlain
target:self
action:#selector(refreshPropertyList:)];
editEntityViewController.navigationItem.rightBarButtonItem = anotherButton;
[anotherButton release];
[self presentModalViewController:navController animated:YES];
[editEntityViewController release];
As discussed, your code was correct and is the standard way to show a popup sheet with a UINavigationBar to hold buttons to dismiss the sheet. However, you had defined an IBOutlet in EditViewController called navigationItem, which was causing a conflict.
Try setting the rightBarButtonItem on editEntityViewController before you create the UINavigationController with initWithRootViewController:.
I think that the navigation bar is set up when the UINavigationController is created. Adding the right bar item after creation time is too late.
EDIT: Ok, so that's not the issue.
The following minimal code snippet works so I would check whether your EditEntityViewController is doing something to remove the button elsewhere:
- (IBAction)showPopup:(id)sender
{
UIViewController *popupController = [[UIViewController alloc] init];
UINavigationController *navController = [[UINavigationController alloc] initWithRootViewController:popupController];
navController.modalPresentationStyle = UIModalPresentationFormSheet;
navController.modalTransitionStyle = UIModalTransitionStyleFlipHorizontal;
UIBarButtonItem *anotherButton = [[UIBarButtonItem alloc] initWithTitle:#"Show"
style:UIBarButtonItemStylePlain
target:self
action:nil];
popupController.navigationItem.rightBarButtonItem = anotherButton;
[anotherButton release];
[self presentModalViewController:navController animated:YES];
[popupController release];
}
The reason why this was not working is really stupid. Basically I had an IBOutlet defined in EditViewController called navigationItem which was conflicting with the SDK's property with the same name.
I removed it and the link from the nib and as Robin says it works perfectly.
Modally presented view controllers on navigation controllers don't have navigationItem nor navigationController properties. They DO, however, have parentViewController property, but this is irrelevant in your case.
If you want to customize navigation bar on your modally presented view, you should connect IBOutlet from view controller managing that view to the navigation bar placed in that managed view. Then do the manipulation through IBOutlet instance variable.
I need to implement the back button; (as in webpages, when you click the back button the screen will set focus to the previous screen).
I am not using a navigation control here, instead i want to do this using a Navigation bar and then adding a navigation button on it. Now when the user clicks on the navigation button the previous view should be displayed.
How should i do this.
My screen looks like this :
When i click on Hello, it should go to the previous screen.
Check out UINavigationController Class Regerence then try something like this:
- (void)pickerCancel {
[self dismissModalViewControllerAnimated:YES];
}
- (void)doSomething {
[myView.navigationItem setBackBarButtonItem:[[[UIBarButtonItem alloc] initWithBarButtonSystemItem:UIBarButtonSystemItemDone target:self action:#selector(pickerCancel)] autorelease]];
UINavigationController *navigation = [[UINavigationController alloc] initWithRootViewController:myView];
[navigation setModalTransitionStyle:UIModalTransitionStyleFlipHorizontal];
[navigation setDelegate:self];
[self presentModalViewController:navigation animated:YES];
[myView release];
[navigation release];
}
You really should use a UINavigationController as that is its entire purpose.
In my app, I'm presenting a modalviewcontroller as follows and I'm not able to change the navigationbar's title or any of its properties for that matter.
fullListTopCompanies *fullListTopCompaniesInstance = [[fullListTopCompanies alloc] initWithNibName:#"fullListTopCompanies" bundle:nil];
UINavigationController *cntrol = [[UINavigationController alloc] initWithRootViewController:fullListTopCompaniesInstance];
[fullListTopCompaniesInstance setTitle:#"TEST"];
UIBarButtonItem *submit = [[UIBarButtonItem alloc]
initWithBarButtonSystemItem:UIBarButtonSystemItemDone
target:self
action:#selector(displayViewForPosts)];
fullListTopCompaniesInstance.navigationItem.rightBarButtonItem = submit;
[submit release];
[self presentModalViewController:cntrol animated:YES];
[cntrol release];
I tried instantiating application delegate and assigning its navigationcontroller to local navigationcontroller instance but no use.
Somehow that navigationcontroller is not accessible. It can't be accessed by using "self.navigationitem". Whenever I present modalviewcontroller with the navigationcontroller, this navigation comes below the actual navigationcontroller.
For Example, if you are trying to set title of navigation bar for the ViewController called "ABCViewController", then add
self.Title = #"";
in viewWillAppear Method of the ABCViewController and try to rebuild and Run.
Hope this helps. :)
Whenever I present modalviewcontroller with the navigationcontroller, this navigation comes below the actual navigationcontroller.
That problem is because calling presentModalViewController: on self, you should call it on self.navigationController that way the navigation controller won't be shown below the other one.
As to why you can't set the navigationController's properties, I don't know. It looks Ok to me. But I expect it is because you are setting the properties before viewDidLoad is called by the nib-loader. I think I remember having problems like this myself a long time ago.
You should set the title etc. in the UIViewController subclass's viewDidLoad method and I think you worries will be over.
I've created a simple view based app with xcode template, then i've added your code and it's working for me...
- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {
// Override point for customization after application launch.
// Add the view controller's view to the window and display.
TestViewController *fullListTopCompaniesInstance = [[TestViewController alloc] initWithNibName:#"TestViewController" bundle:nil];
UINavigationController *cntrol = [[UINavigationController alloc] initWithRootViewController:fullListTopCompaniesInstance];
[fullListTopCompaniesInstance setTitle:#"TEST"];
UIBarButtonItem *submit = [[UIBarButtonItem alloc]
initWithBarButtonSystemItem:UIBarButtonSystemItemDone
target:self
action:#selector(displayViewForPosts)];
fullListTopCompaniesInstance.navigationItem.rightBarButtonItem = submit;
[window addSubview:viewController.view];
[window makeKeyAndVisible];
[viewController presentModalViewController:cntrol animated:YES];
[cntrol release];
[submit release];
return YES;
}
I have 2 XIBs with their corresponding View Controllers. Will call them MainViewController and AboutViewController. The names of the XIBs are exactly the same as the names of the ViewControllers. Upon a button click in the MainViewController, I want to show the AboutViewController.
I have code like this in the MainViewController:
- (IBAction) infoButtonAction:(id)sender {
AboutViewController *aboutViewController = [[AboutViewController alloc] init];
[[self navigationController] pushViewController:aboutViewController animated:YES];
}
But nothing happens, the AboutViewController does not show up. I also tried this line:
AboutViewController *aboutViewController = [[AboutViewController alloc] initWithNibName:#"AboutViewController" bundle:nil];
But to no avail. What am I missing?
Examine your AboutViewController.xib in Interface Builder and ensure that the File Owner is set to AboutViewController in the class inspector. Also ensure that the view property of the File Owner is wired into the View in the xib. Finally, the code to display it should read:
- (IBAction) infoButtonAction:(id)sender {
AboutViewController *aboutViewController = [[AboutViewController alloc] initWithNibName:#"AboutViewController" bundle:nil];
[[self navigationController] pushViewController:aboutViewController animated:YES];
[aboutViewController release];
}
Also, you should check that this is non-nil inside that same method:
UINavigationController * nc = self.navigationController;
do you get an error? Did you check that the button is correctly wired in IB?
did you try using a modal view controller?