UIToolbar button on the MainViewController presents UIViewController, now i want to display multiple UIViewControllers one after the other via this button.What is the best way to do this.
- (void)displayviewsAction:(id)sender
{
PageOneViewController *viewController = [[[PageOneViewController alloc] init]autorelease];
viewController.view.frame = CGRectMake(0, 0, 320, 480);
[self.view addSubview:viewController.view];
[self.view addSubview:toolbar];
}
when button is pressed it displays this UIViewController now right after this UIViewController i want to present multiple UIViewControllers one after the other.
Any ideas please.
Say you want to display view controllers A,B,C by tapping on main view controller's tool bar button. To do so write
[self presentModalViewController:a animated:YES];
on button action. In A's viewDidAppear: method, write
[self presentModalViewController:b animated:YES];
Writing same for all view controllers will display viewControllers one after another.
Related
I am trying to make a navigation based application having three UIViewController in navigation stack. I have a bottom bar (UITabBar).
I want to hide tabbar when first UIViewController is pushed into the stack and I want to show tabbar when second UIVIewController is pushed.
Here is the code I have written to do so.
For First UIVIewController:
NotificationDetailsVC *obj = [[NotificationDetailsVC alloc] init];
obj.hidesBottomBarWhenPushed = YES;
[self.navigationController pushViewController:obj animated:YES];
[obj release];
For Second UIViewController I have done:
NotificationBO *obj=[self.notificationsArray objectAtIndex:indexPath.row];
object.hidesBottomBarWhenPushed = NO;
[self.navigationController pushViewController:object animated:YES];
[object release];
Now the problem is that, I can get UITabBar Hidden for first UIViewController, but for second it is also hidden.
How can I solve this issue?
Instead of using hidesBottomBarWhenPushed method. Try your code for hiding tabbar in your ViewController, like
[self.tabBarController.tabBar setHidden:YES];
and for showing tabbar
[self.tabBarController.tabBar setHidden:NO];
The above one will work, but the problem is it'll leave an empty space in viewController bottom. To overcome this, set frame to your tabbarController.
For Hiding, set
[self.tabBarController.tabBar setFrame:CGRectMake(0, 480, 320, 50)]
For Showing, set
[self.tabBarController.tabBar setFrame:CGRectMake(0, 430, 320, 50)]
I have an activity view that I have added in AppDelegate class to tap bar:
[self.mainTabBar.view addSubview: spinner];
When there are connection problems it is visible in each view controller and is spinning.
There is some button at certain view controller, makes to present some modal view controller.
That modal view controller overlaps the spinner. How to make that spinner always be on top of all views or at least on top of that modal view controller?
I tried to make such a thing in view controller that presents modal view controller:
[self presentModalViewController:selectionViewController animated:YES];
[self.view bringSubviewToFront:[self.tabBarController.view viewWithTag:15]];
Not works.
Add the view to the main window.
UIWindow* mainWindow = [[UIApplication sharedApplication] keyWindow];
[mainWindow addSubview: spinner];
While phix23's answer is correct, here is a more complete example:
//The view you want to present
UIViewController *viewControllerYouWantToPresentOnTop = [[UIViewController alloc] initWithNibName:nil bundle:nil];
//Create transparent host view for presenting the above view
UIWindow* mainWindow = [[UIApplication sharedApplication] keyWindow];
UIViewController *viewControllerForPresentation = [[UIViewController alloc] init];
[[viewControllerForPresentation view] setBackgroundColor:[UIColor clearColor]];
[[viewControllerForPresentation view] setOpaque:FALSE];
[mainWindow addSubview:[viewControllerForPresentation view]];
//Make your transparent view controller present your actual view controller
[viewControllerForPresentation presentViewController:viewControllerYouWantToPresentOnTop animated:TRUE];
Remember to clean up after yourself when you don't need these any longer.
This code can be used from anywhere in your app, even a library :)
An app normally displays its content within a single window throughout its life.
But there are situations where an extra window may be used to add content on top of everything else. Apple ensures UIAlertView always stays on top by adding it in a separate window.
UIView *contentView = [[UIView alloc] initWithFrame:contentFrame];
contentView.backgroundColor = [UIColor greenColor];
UIWindow *window = [[UIWindow alloc] initWithFrame:CGRectMake(x,y,contentFrame.size.width, contentFrame.size.height)];
window.windowLevel = UIWindowLevelAlert;
[window addSubview:contentView];
[window makeKeyAndVisible];
Show and hide your window by setting window.hidden = Yes or No as needed.
This will always show your contentView on top of everything else in the app.
The modal controller is in a completely different layer, you cannot make any subview of the presenting controller to overlap it.
Use a UIAlertView with a spinner inside. The alerts are displayed in a layer which overlaps even modal controllers.
Place the view to the keyWindow, as suggested above. You might also need to set Presentation style of the modal view as Current Context, otherwise, it can still pop on top
I'm using a Navigation Controller. My RootViewController pushes a number of views but it also presents a modal view. That modal view presents a tableView. So what I'm trying to do is figure out of I can push the Navigation Controller across the modal view, then use it from that modal view to push the view with the tableView? or barring that, is there a way to implement a second Navigation Controller from the modal view?
The real issue is that I want to present the view with the tableView using a right to left transition, which of course is not available with modal views.
I have this code that SORT OF provides the right to left transition used by the Navigation Controller:
NewViewController *newViewController = [[NewViewController alloc] init];
[self presentModalViewController:newViewController animated:NO];
CGSize theSize = CGSizeMake(320, 460);
newViewController.view.frame = CGRectMake(0 + theSize.width, 0 + 20, theSize.width, theSize.height);
[UIView beginAnimations:#"animationID" context:NULL];
[UIView setAnimationDuration:0.5];
newViewController.view.frame = CGRectMake(0, 0 + 20, 320, 460);
[UIView commitAnimations];
[newViewController release];
The problem is that the OldViewController (the one calling the NewViewController) disappears immediately so the NewViewController transitions across a blank screen, instead of covering the OldViewController.
Presenting a UIViewController modally creates a whole new navigation stack. You could do something like this:
//Create the view you want to present modally
UIViewController *modalView = [[UIViewController alloc] init];
//Create a new navigation stack and use it as the new RootViewController for it
UINavigationController *nav = [[UINavigationController alloc] initWithRootViewController:modalView];
//Present the new navigation stack modally
[self presentModalViewController:nav animated:YES];
//Release
[modalView release];
[nav release];
This can be done because UINavigationController is a subclass of UIViewController. When the new view is loaded, you can use it however you wish (push another view on top of it, us UIView animations like Waqas suggeste, etc').
I hope I got your question correctly. Do tell if I didn't.
I have app with UItabBarTemplate with navigation controller.
On selecting tab bar ViewControllerA is shown which on button touch pushes UIPieChartTabController which inherits "UIViewController".
Now I want another tab bar in UIPieChartTabController.
so in viewDidLoad of UIPieChartTabController
- (void)viewDidLoad {
[super viewDidLoad];
UIView *contentView = [[UIView alloc] initWithFrame:[[UIScreen mainScreen] applicationFrame]];
contentView.backgroundColor = [UIColor whiteColor];
self.view = contentView;
[contentView release];
UITabBarController *tabbar= [[UITabBarController alloc] init];
tabbar.view.frame = CGRectMake(0, 0, 320, 460);
piechartViewController *pr=[[piechartViewController alloc]init];
pr.tagInAction=1;
pr.title=#"Type";
pr.tabBarItem.image=[UIImage imageNamed:#"trend.png"];
pr.sDate=sDate;
pr.nDate=nDate;
piechartViewController *pr1=[[piechartViewController alloc]init];
pr1.title=#"category";
pr1.tagInAction=4;
pr1.sDate=sDate;
pr1.nDate=nDate;
piechartViewController *pr2=[[piechartViewController alloc]init];
pr2.title=#"paidWith";
pr2.tagInAction=3;
pr2.sDate=sDate;
pr2.nDate=nDate;
//tabbar.tabBar.delegate=self;
//this gave me error
ExportRep *pr3=[[ExportRep alloc]init];
pr3.tabBarItem.image=[UIImage imageNamed:#"database.png"];
pr3.title=#"Export Expenses";
[tabbar setViewControllers:[NSArray arrayWithObjects:pr,pr1,pr2,pr3,nil]];
[self.view addSubview:tabbar.view];
[pr release];
[pr1 release];
[pr2 release];
}
This piece of code worked but now when I select tab of viewController ExportRep type I tried
[self presentModalViewController:objMFMailComposeViewController animated:YES];
but navigationController of objMFMailComposeViewController hides behind navigationController of view that is presenting objMFMailComposeViewController.
Also viewWillAppear viewDidAppear of all the view controller which are bound to tab bar never gets called.
But none of this problem occurs for tabbar and viewcontroller which gets created by UITabbarTemplate.
Why Is it so? Whats wrong when I create Tab bar?
placing another tabBar within a tabbarVC, is not recommended. Why not use a UIToolBar to do the swapping of Views in your PieChartVC instead?
-apart from that, the reason your code doesn't call viewWillAppear,viewDidAppear is because of this:
[tabbar setViewControllers:[NSArray arrayWithObjects:pr,pr1,pr2,pr3,nil]];
[self.view addSubview:tabbar.view];
here only loadView of those prs will be called.
the viewControllers you assign to the tabBars should instead be wrapped around UINavigationControllers.
So something like this instead would do the trick
UINavigationController *nc1 = [[UINavigationController alloc]initWithRootViewController:pr];
[nc1.view setFrame:CGRectMake:("the frame in which you wnt prs to be displayed")];
[pr.view setFrame:nc1.view.frame];
. // similarly assign NavControllers for all prs
.
.
.
[tabbar setViewControllers:[NSArray arrayWithObjects:nc,nc1,nc2,nc3,nil]];
[self.view addSubview:tabbar.view];
The reason why new view which is being presented modally got its navigation bar hidden lies in [self.view addSubview:tabbar.view];
so it got room to present its view only in parent controllers view thus got cut its navigation bar.
so to hack it I kept tab selected and instead of presenting it in selected view controller,have presented it in main view controller only.
As you guess am still a newbie, getting my head around iphone development.
I am just trying out basic view loading on demand, which i cant get to work
I have an app, with 2 view controllers, each view controller connected a different nib file.
I am trying to switch between view manually; there is no navigation control involved.
How can i manually push the second view to the first view?
self.navigationController pushViewController wont work since there is no navigation controller.
How else can I push the second view on top of the first view and destroy the first view; and ofcourse vice versa?
I have done this in the first view's button action:
SecondView *sv=[[SecondView alloc] initWithNibName:#"SecondView" bundle:nil];
[self.navigationController pushViewController:sv animated:YES];
obviously, it didn't work.
window addSubView didn't work either, because the first view controller is the root view controller (not sure i said that right). In other words, when i run the app, the first view is what I see with a button that is supposed to load the second view.
I have spent hours searching for a simple example, and I couldn't find any.
Any suggestions?
in the first view controller you need this:
- (IBAction)pushWithoutViewController:(id)selector {
NextNavigationController *page = [[NextNavigationController alloc] initWithNibName:NextNavigationController bundle:nil];
CGRect theFrame = page.view.frame;
theFrame.origin = CGPointMake(self.view.frame.size.width, 0);
page.view.frame = theFrame;
theFrame.origin = CGPointMake(0,0);
[UIView beginAnimations:nil context:nil];
[UIView setAnimationDuration:0.8f];
page.view.frame = theFrame;
[UIView commitAnimations];
[self.view addSubview:page.view];
[page release];
}
and then link it to the button in nib. :)
try :
SecondView *sv=[[SecondView alloc] initWithNibName:#"SecondView" bundle:nil];
[self presentModalViewController:sv animated:YES];
IF you have first xib and you want to give navigation to another controller then you have to declare navigation in to appdelegate.m
write following code to app
UINavigationController *navController = [[UINavigationController alloc] initWithRootViewController:self.viewController];
self.window.rootViewController = navController;
then in ViewController.m
- (IBAction)NextButtonClicked:(id)sender
{
yourNextViewController *objyourNextViewController = [[yourNextViewController alloc] initWithNibName:#"yourNextViewController" bundle:nil];
[self.navigationController pushViewController:objStartUpViewController animated:TRUE];
}