I am currently making a camera app for iPhone and I have a strange phenomenon that I can't figure out. I would appreciate some help understanding.
When recreating an overlay view for passing to UIImagePickerController, I have been successfully been able to create the view programmatically. What I haven't been able to do is create the view with/without controller in IB, load it and pass it to the overlay pointer successfully. If I do it via IB, the view is not opaque and obscures the view of the camera completely. I can not figure out why.
I was thinking that the normal view pointer might be assigned when loading from XIB and therefore overwrite the camera's view, but I have an example programmatically where view and overlayView are set equal in the controller class. Perhaps the load order is overwriting a pointer?
Help would be appreciated... kind regards.
This works fine...
- (void)applicationDidFinishLaunching:(UIApplication *)application {
// dislodge the MainView from the MainViewController
//
MainViewController *aController = [[MainViewController alloc] init]; //WithNibName:#"MainView" bundle:nil];
aController.sourceType= UIImagePickerControllerSourceTypeCamera;
aController.delegate= aController;
aController.showsCameraControls= NO;
// Programmatically load the MainView from the Nib and assign it as the OverlayView instead
//
NSArray* nibViews= [[NSBundle mainBundle] loadNibNamed:#"MainView" owner:aController options:nil];
UIView* uiView= [nibViews objectAtIndex:0];
uiView.opaque= NO;
uiView.backgroundColor= [UIColor clearColor];
aController.cameraOverlayView= uiView;
self.mainViewController = aController;
[aController release];
mainViewController.view.frame = [UIScreen mainScreen].applicationFrame;
[window addSubview:[mainViewController view]];
[window makeKeyAndVisible];
}
This DOESN'T...
- (void)applicationDidFinishLaunching:(UIApplication *)application {
// dislodge the MainView from the MainViewController
//
MainViewController *aController = [[MainViewController alloc] initWithNibName:#"MainView" bundle:nil];
aController.sourceType= UIImagePickerControllerSourceTypeCamera;
aController.delegate= aController;
aController.showsCameraControls= NO;
aController.cameraOverlayView= aController.view;
self.mainViewController = aController;
[aController release];
mainViewController.view.frame = [UIScreen mainScreen].applicationFrame;
[window addSubview:[mainViewController view]];
[window makeKeyAndVisible];
}
Related
I have a view controller named ViewController.
ViewController displays a UIView that has a button on it, which allows me to advance to a second view controller - SecondViewController.
SecondViewController also has a button on it, which allows me to advance to a third view controller.
However, I am having trouble displaying ThirdViewController. When I tap the button in SecondViewController it throws an error:
Warning: Attempt to present ... on ... whose view is not in the window hierarchy!
I have been to a bunch of other sites and posts that address this issue, but cannot seem to find a working solution. I have implemented quite a few solutions, but none seem to work.
Here is my code:
- (void)secondaryView:(UIView *)secondaryView
{
UIView *theView = secondaryView;
UIViewController *viewController = [[UIViewController alloc] init];
viewController.view.frame = [UIScreen mainScreen].bounds;
[viewController.view addSubview:theView];
viewController.modalTransitionStyle = UIModalTransitionStyleCrossDissolve;
[self presentViewController:viewController animated:YES completion:nil];
}
secondaryView is a UIView that I am constructing elsewhere in the application. I add it to the viewController then present the viewController.
Is there any way to dynamically create UIViewControllers, add a UIView to each one, and add them to the window hierarchy?
If you can use navigation in your ViewControllers, you can try the below code
In the place where you call the firstViewController,
-(void)callFirst
{
FirstViewController *first = [FirstViewController alloc] init];
UINavigationController *navigationController = [UINavigationController alloc] initWithRootViewController:first];
navigationController.modalPresentaionStyle = UIModalPresenationFormSheet;
[self presentModalViewController:navigationController animated:YES];
}
And in the FirstViewController button action ,you can write
-(void)callSec
{
SecondViewController *sec = [SecondViewController alloc] init];
[self.NavigationController pushViewController:sec animated:YES];
}
And in SecondViewController you can do the same
-(void)callThird
{
ThirdViewController *third = [ThirdViewController alloc] init];
[self.NavigationController pushViewController:third animated:YES];
}
Try this...And in these ViewControllers you can do whatever coding you want to meet the requirement like
-(void)viewDidLoad
{
UIView *newView = [[UIView alloc] initWithFrame:CGRectMake(20,20,400,400)];
newView.backGroundColor = [UIColor redColor];
[self.view addSubView:newView];
}
I'm still new to iOS development but I've ran into a problem that I can't solve and I've tried looking online but can't find anything yet.
I'm using a UIImagePickerController to pick and image and I'm using it in the App Delegate. When an image is returned, in the imagePickerController:didFinishPickingMediaWithInfo method, I want to make a new navigation controller with a view controller and put it over the "app".
Here is how I'm doing it:
CustomNavigationController *customNavigationController = [[CustomNavigationController alloc] init];
PhotoViewController *photoViewController = [[PhotoViewController alloc] initWithNibName:#"PhotoViewController" bundle:[NSBundle mainBundle]];
[customNavigationController pushViewController:photoViewController animated:NO];
[customNavigationController.view setFrame:[[UIScreen mainScreen] applicationFrame]];
[photoViewController release];
[self.window addSubview:customNavigationController.view];
//Call method of photoViewController.
[[customNavigationController.viewControllers objectAtIndex:0] addPhotoFromData:info];
[self.tabBarController dismissViewControllerAnimated:YES completion:nil]; //Get rid of UIImagePickerController
However in the photoViewController, I don't have access to any instance variables synthesized and loaded in viewDidLoad. They all return to null. There is also a tableView and calls to reload the tableView do not actually cause the tableView to respond.
Here is some of the code from photoViewController
- (void)viewDidLoad
{
[super viewDidLoad];
self.photoCount = 0;
self.timestamp = [[NSDate date] timeIntervalSince1970];
self.photos = [[NSMutableArray alloc] initWithCapacity:5];
self.photosData = [[NSMutableArray alloc] initWithCapacity:5];
self.uploadingCount = 0;
UINib *customCell = [UINib nibWithNibName:#"CustomTableCell" bundle:[NSBundle mainBundle]];
[self.tableView registerNib:customCell forCellReuseIdentifier:#"customCell"];
self.tableView.separatorColor = [UIColor clearColor];
NSLog(#"%#", self);
}
and also the addPhotoFromData method:
- (void)addPhotoFromData:(NSDictionary *)info
{
[self.photos addObject:info];
NSLog(#"%#", self.photos); //Doesn't add "info" and does not return anything when later called from other methods.
[self.tableView reloadData]; //Doesn't work
Everything was working before I add in the UINavigationController. I'm completely lost.
EDIT: After some more debugging attempts, I have discovered that the view is not loaded when addPhotoFromData is called. viewDidLoad is called afterwords. Is there a way to delay method calls?
Any reason you can't have the PhotoViewController call addPhotoFromData: inside the viewDidLoad method? You can always access properties of the app delegate from the view controller:
YourAppDelegateType * delegate = [UIApplication sharedApplication].delegate;
[self addPhotoFromData:delegate.info];
Not sure how to title this question, but i'v got such a problem: Up until now i my app runs mainly in one navigationcontroller with table views. But now i'm trying to integrate dropdown settings menu, and can't get it properly done.
The way i'v done now and it works
The changeController is called from one button. ChangeController is in appdelegate.
- (void) ChangeController
{
self.window.backgroundColor = [UIColor blackColor];
DropDownExample *e = [[DropDownExample alloc] initWithStyle:UITableViewStyleGrouped];
self.navigationController = [[UINavigationController alloc] initWithRootViewController:e];
[e release];
[self.window addSubview:self.navigationController.view];
self.window.backgroundColor = [UIColor blackColor];
[self.window makeKeyAndVisible];
}
But this approach has consequances - there is no transition if button is pressed, the settings menu appears instantly, you cannot go back via navigation bar above (nothing there).
So how to do this properly?? I'm new to ios, so just tell me the whole idea how to do this.
Didfinishlaunchingwithoptions method from appdelegate
- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions
{
self.window = [[[UIWindow alloc] initWithFrame:[[UIScreen mainScreen] bounds]] autorelease
];
// Override point for customization after application launch.
self.window.backgroundColor = [UIColor whiteColor];
TableViewController *tableVC = [[TableViewController alloc] initWithNibName:#"TableView" bundle:nil andType:CONTROLLER_TYPE_FIRST];
UINavigationController *navC = [[UINavigationController alloc] initWithRootViewController:tableVC];
self.navigationController = navC;
[tableVC release];
[navC release];
self.window.rootViewController = _navigationController;
[self.window makeKeyAndVisible];
return YES;
}
Ok, here's the answer. Write the method changeController in the same class where the Button exists which calls changeController
In the method, write this.
- (void) ChangeController
{
DropDownExample *e = [[DropDownExample alloc] initWithStyle:UITableViewStyleGrouped];
[self.navigationController pushViewController:e animated:YES];
[e release];
}
What you want is to insert new UIViewController on the top of the present Stack. If you would be having a navigation Bar at the top by default then there would be a back Btn by default, which would pop up that controller.
I am working on a small app, according to the requirement the app should have a tabBarItem with 3 items. For this I have programmatically created the tabBarController in the AppDelegate.m file and added the 3 different viewControllers, instantiated them and everything is working good. I see the tabBarItems and all views are working. In one of the views lets say in SecondViewController I show a popOverController where I used a UITableView and populate it with items. When I click one of the items it should show another view lets say sendFeedback. Until there everything is working fine, but as soon as this sendFeedback is presented as the modal view, it occupies the whole app i.e it hides the tabBarItem.
I present the important pieces of code here for review:
AppDelegate.m
- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions
{
self.window = [[[UIWindow alloc] initWithFrame:[[UIScreen mainScreen] bounds]] autorelease];
// Override point for customization after application launch.
UIViewController *viewController1 = [[FirstViewController alloc] initWithNibName:#"FirstViewController" bundle:nil];
viewController1.title = #"First";
UIViewController *viewController2 = [[SecondViewController alloc] initWithNibName:#"SecondViewController" bundle:nil];
viewController2.title = #"Second";
UITableViewController *tableView3 = [[tableViewController alloc]initWithNibName:#"tableViewController" bundle:nil];
tableView3.title = #"Third";
self.tabBarController = [[UITabBarController alloc] init];
self.tabBarController.viewControllers = [NSArray arrayWithObjects:viewController1, viewController2, tableView3 ,nil];
self.tabBarController.delegate = self;
self.window.rootViewController = self.tabBarController;
[self.window makeKeyAndVisible];
[viewController1 release];
[viewController2 release];
[tableView3 release];
return YES;
}
In my popOverViewController.m file I am checking which row is selected in the table according to that I present the view
#pragma mark - TableView Delegate Methods
- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath{
sendFeedback *sendEmailViewController = [[sendFeedback alloc]initWithNibName:#"sendFeedback" bundle:nil];
downLoad *downloadFilelViewController = [[downLoad alloc]initWithNibName:#"downLoad" bundle:nil];
if (indexPath.row == 0)
[self presentModalViewController:sendEmailViewController animated:YES];
else
[self presentModalViewController:downloadFilelViewController animated:YES];
}
Can anyone guide me how to overcome this with the multiple views. In case if anyone requires more information from my side I would be glad to provide.
NOTE: It is the same with the other view (downLoad) as well
EDIT: Here is how I am initializing my PopOverController in the AppDelegate.m file
- (void)tabBarController:(UITabBarController *)tabBarController didSelectViewController:(UIViewController *)viewController
{
if([viewController isKindOfClass:[SecondViewController class]]){
NSInteger index = [[self tabBarController] selectedIndex];
CGRect buttonFrame = [[[[[self tabBarController] tabBar] subviews] objectAtIndex:index+1] frame];
PopOverViewController *popoverView = [PopOverViewController new];
popoverView.contentSizeForViewInPopover = CGSizeMake(250, 85);
popover = [[UIPopoverController alloc]initWithContentViewController:popoverView];
NSLog(#"X:%f Y:%f",buttonFrame.origin.x,buttonFrame.origin.y);
[popover presentPopoverFromRect:buttonFrame inView:self.tabBarController.tabBar permittedArrowDirections:UIPopoverArrowDirectionDown animated:YES];
}
Thanks
Modal view controllers are used to "block" your application and fulfill a task before you can proceed. So modal view controllers are not what you want to use.
Instead wrap your controllers which have to be shown in the popover in a navigation controller. In the tableView:didSelectRowAtIndexPath: method you can push the corresponding view controller to the navigation stack.
To slove your problem:
At the place where you create the popovercontroller initialize it with a new UINavigationController. And the navigation controller you have to initialize with a rootviewcontroller namely PopOverViewController.m.
PopOverController *popoverContentController = [[PopOverController alloc] init];
UINavigationController *navcon = [[UINavigationController alloc] initWithRootViewController:popoverContentController];
popoverController = [[UIPopoverController alloc] initWithContentViewController:popoverContentController];
And in PopOverController.m
if (indexPath.row == 0)
[self.navigationController pushViewController:sendEmailViewController animated:YES];
else
[self.navigationController pushViewController:downloadFilelViewController animated:YES];
I am trying to push in a new view controller with the code:
[self.navigationController pushViewController:webViewController animated:YES];
But its not working. This code happens when you select a cell in my table view. I have a table view which I think is preventing this from happening. I have tried presenting it modally but that gets rid of the navigation bar and i can't go back. There is an extremely similar to this but the answer didn't work for me!
UPDATE
- (void)loadView {
// Create an instance of UIWebView as large as the screen
CGRect screenFrame = [[UIScreen mainScreen] applicationFrame];
UIWebView *wv = [[UIWebView alloc] initWithFrame:screenFrame];
// Tell web view to scale web content to fit within bounds of webview
[wv setScalesPageToFit:YES];
[self setView:wv];
[wv release];
}
puts the web view as the WebViewController's view
there is no nib as shown above
the didSelect cell method IS CALLED using an NSLog to find out
Everything is initialized and allocated and non-zero
UPDATE:
my did select cell method:
-(void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath {
// Push the web view controller onto the navigaton stack - this implicity
// creates the web view controller's view the first time through
NSLog(#"TOUCHED!");
webViewController = [[WebViewController alloc] init];
if (webViewController == nil) {
NSLog(#"webViewController in nil state");
}
[self.navigationController pushViewController:webViewController animated:YES];
// Grab the selected item
RSSItem *entry = [[channel items] objectAtIndex:[indexPath row]];
// Construct a URL with the link string of the item
NSURL *url = [NSURL URLWithString:[entry link]];
// Construct a request object with that URL
NSURLRequest *req = [NSURLRequest requestWithURL:url];
// Load the request into the web view
[[webViewController webView] loadRequest:req];
// Set the title of the web view controller's navigation item
[[webViewController navigationItem] setTitle:[entry title]];
}
ALL OF THIS WORKED BEFORE INSERTING TAB BAR CONTROLLER
UPDATE
Where I create the controllers (IN APP DELEGATE):
- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions
self.window = [[[UIWindow alloc] initWithFrame:[[UIScreen mainScreen] bounds]] autorelease];
// Override point for customization after application launch.
ListViewController *lvc = [[ListViewController alloc] initWithStyle:UITableViewStylePlain];
[lvc autorelease];
// Create the tabBarController
UITabBarController *tabBarController = [[UITabBarController alloc] init];
// Create two view controllers
UIViewController *vc1 = [[ListViewController alloc] initWithStyle:UITableViewStyleGrouped];
UIViewController *vc2 = [[YoutubeViewController alloc] init];
// Make an array containing the two view controllers
NSArray *viewControllers = [NSArray arrayWithObjects:vc1, vc2, nil];
// The viewControllers array retains vc1 and vc2, we can release
// our ownership of them in this method
[vc1 release];
[vc2 release];
// Attach them to the tab bar controller
[tabBarController setViewControllers:viewControllers];
// Put the tabBarController's view on the window
[[self window] setRootViewController:tabBarController];
// The window retains tabBarController, we can release our reference
[tabBarController release];
// Show the window
[[self window] makeKeyAndVisible];
return YES;
}
So I really have no idea whats going on here. Also IF YOU COULD PLEASE HELP ME WITH ANOTHER QUESTION! Go to my profile and see the question about how to stop cutoffs/add extra line for text label in uitableviewcell
I don't see the initial UINavigationViewController in your app delegate. In order to use the self.navigationController pushViewController, the view controller needs to be in one of the self.navigationController.viewControllers. Can you modify your code and try the following and see it works for you.
// Create two view controllers
UIViewController *vc1 = [[ListViewController alloc] initWithStyle:UITableViewStyleGrouped];
UIViewController *vc2 = [[YoutubeViewController alloc] init];
// Create the UINavigationController and put the list view controller as the root view controller
UINavigationController *navController = [[UINavigationController alloc] initWithRootViewController:vc1];
// Make an array containing the two view controllers and the UINavigationController which has the ListViewController is the first one.
NSArray *viewControllers = [NSArray arrayWithObjects:navController, vc2, nil];
// The viewControllers array retains vc1 and vc2, we can release
// our ownership of them in this method
[vc1 release];
[vc2 release];
[navController release];
// Attach them to the tab bar controller
[tabBarController setViewControllers:viewControllers];
There are several points you have to check, in order to make the push successful.
First, the view controller to be pushed is probably designed and stored in a NIB file. Check how you create it in your code, particularly the NIB file name (assuming you use -(id)initWithNibName:(NSString *)nibName bundle:(NSBundle *)nibBundle). It must be the real NIB filename without the NIB/XIB extension.
Second, is the selection event triggered and the message really sent to the table view delegate ? You could put some logging to ensure that. The table view won't prevent the view controller from being pushed on the navigation stack.
The question isn't really precise on how/where you create that controller, so finally, if none of this works, make the test to alloc/init the controller just before pushing. You might have a better understanding of what is going on.
If the view controller is under the "More" button, then things change a bit.
Here's what worked for me to figure out what navigation controller to use:
- (void)application:(UIApplication *)app didReceiveLocalNotification:(UILocalNotification *)notif {
UITabBarController *tabBar = (UITabBarController*) self.window.rootViewController;
UINavigationController* navigationController = (UINavigationController*)self.tabBarController.selectedViewController;
UIViewController* top = nil;
if ([navigationController respondsToSelector:#selector(topViewController)]) {
top = navigationController.topViewController;
}
// the actual current navigation controller depends on whether we are on a view under the More tab
UINavigationController *curNavController;
if (top == nil) { // this implies a view under the More tab
curNavController = tabBar.moreNavigationController;
} else {
curNavController = navigationController;
}
[[LocalNotificationMgr Get] ReceivedNotification:notif navController:curNavController];
}
Basically if the user is on a view under the More tab, the actual current UINavigationController you want to use to push a UIViewController onto is the UITabBarController's moreNavigationController property.
If on a view actually visible on the tab bar itself, use the UITabBarController's selectedViewController property.
NOTE: if you're on the "More screen" itself, you can use either property.
Did you do it in the manner like below??
- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath
{
if(reqList==Nil)
{
reqList = [[RequestList alloc]initWithNibName:#"RequestList" bundle:nil];
}
[self.navigationController pushViewController:reqList animated:YES];
}