In my app delegate i set up another screen (for airPlay).
When i create a second window and assign the Second screen to it and run the app the TableView in my storyboard turns to a black colour. Its as if the tableView is not rendering correctly. I have isolated the problem to :
self.HDTVwindow.screen=[[UIScreen screens] objectAtIndex:1];
where the HDTVWindow is the second window for my airplay app. When i comment out this code the storyboard runs fine and my UITableView is nice and white. Am i confusing the storyboard by making two UIWindows in the appDelegate, even though they are assigned to different screens??
For my appDelegate see below.
- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions
{
if ([[UIScreen screens] count]>1)
{
CGRect frame = [[UIScreen screens]objectAtIndex:1].bounds;
self.HDTVwindow = [[UIWindow alloc] initWithFrame:frame];
UIImage* astonLogo=[UIImage imageNamed:#"AstonUni720p.png"];
UIImageView* astonLogoView=[[UIImageView alloc] initWithImage:astonLogo];
astonLogoView.frame=frame;
[self.HDTVwindow addSubview:astonLogoView];
self.HDTVwindow.hidden = NO;
self.HDTVwindow.screen=[[UIScreen screens] objectAtIndex:1];//PROBLEM!!
}
// Set Up Storyboard
UIStoryboard *storyboard = [UIStoryboard storyboardWithName:#"Main" bundle:nil];
UIViewController *mainViewController = [storyboard instantiateInitialViewController];
self.window = [[UIWindow alloc] initWithFrame:[[UIScreen mainScreen] bounds]];
self.window.rootViewController = mainViewController;
[self.window makeKeyAndVisible];
return YES;
}
The problem disapears when ran with the iPad and an apple TV, it seems there might a bug in the simulator. In future i shall always run my code on real ios devices.
Related
We have a problem where the user is using our app on the iPhone and receives a call while on a view that has been presented by the rootviewcontroller and is covering the navigation controller and it's nav bar. The status bar for the call shows and pushes the current view down but when that view is removed from the superview, the status bar covers half of the navigation bar.
We have tried using a UIApplicationWillChangeStatusBarFrameNotification in the app delegate and then adjusting the size of the navigation controller and the navigation bar to no effect. We have also tried resetting the frame of the navigation controller and nav bar in the viewWillAppear function of the page that presents the view.
Can anyone tell us where we are going wrong?
In App Delegate we tried this
- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {
[self setupAppStyles];
self.window = [[UIWindow alloc] initWithFrame:[[UIScreen mainScreen] bounds]];
self.window.backgroundColor = [UIColor ugBlue];
UINavigationController *navController = [[UINavigationController alloc] init];
self.window.rootViewController = navController;
[self.window makeKeyAndVisible];
[self setUpNotifications];
return YES; }
-(void) setUpNotifications {
[[NSNotificationCenter defaultCenter] addObserver:self
selector:#selector(statusFrameChanged:)
name:UIApplicationWillChangeStatusBarFrameNotification
object:nil];}
- (void)statusFrameChanged:(NSNotification*)note {
CGRect statusBarFrame = [note.userInfo[UIApplicationStatusBarFrameUserInfoKey] CGRectValue];
self.statusHeight = statusBarFrame.size.height;
UIScreen *screen = [UIScreen mainScreen];
CGRect viewRect = screen.bounds;
viewRect.size.height -= self.statusHeight;
viewRect.origin.y += self.statusHeight;
[[UINavigationBar appearance] setFrame:viewRect];
NSLog(#"The status frame has changed");
//[self.navController.view setFrame:viewRect];
self.navController.view.frame.size.height);}
We have also tried something similar in the views viewWillAppear functions also with no positive results. Any thoughts?
We were able to solve this problem. In the viewDidAppear of the view that called presentViewController we put
CGRect screenRect = [[UIScreen mainScreen] bounds];
CGFloat navBarHeight = self.navigationController.navigationBar.frame.size.height;
CGRect frame = CGRectMake(0.0f, statusSize, screenRect.size.width, navBarHeight);
[self.navigationController.navigationBar setFrame:frame];
When the status bar is shown
In my app's delegate, I specify a transparent tool bar with (as suggested in an answer to question 18969248):-
The code is:
UINavigationBar *navigationBarAppearance = [UINavigationBar appearance];
navigationBarAppearance.backgroundColor = [UIColor clearColor];
[navigationBarAppearance setBackgroundImage:[[UIImage alloc] init] forBarMetrics:UIBarMetricsDefault];
navigationBarAppearance.shadowImage = [[UIImage alloc] init];
navigationController = [[UINavigationController alloc] initWithRootViewController:viewController];
This works for all view controllers pushed on to the navigation controller's stack, but not for the root view controller (which is loaded from a NIB).
How can I get transparency in the root view controller's navigation bar?
Maybe you should load your RootViewController programmatically through your AppDelegate this way, if you're using storyboard :
- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions
{
UIStoryboard *mainStoryboard = [UIStoryboard storyboardWithName:#"yourStoryboard"
bundle: nil];
YourCustomRootViewController *customRootVC = (YourCustomRootViewController*) [mainStoryboard instantiateViewControllerWithIdentifier:#"firstAddProductViewController"];
// If you're not using storyboard, simply instantiate it this way
YourCustomRootViewController *customRootVC = [[YourCustomRootViewController alloc] initWithNibName:#"yourNib" bundle:nil];
/* In here, you want to add the code relative to the navigation bar of your rootVC */
[self.window setRootViewController:customRootVC];
}
I have a programmatically generated UINavigationController applied to each of my ViewControllers but this UINavigationController is blank. I need to add some text, an image (if possible) and two buttons.
I have managed to do something similar with a very basic app that only has one ViewController and UINavigationController created in the normal manner but do not know what to do in regards to a programmatically generated one.
I am using storyboards in XCode5/iOS7.
Here is the code that generates the UINavigationController and launches the first ViewController:
- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions
{
UIStoryboard *mainStoryboard = [UIStoryboard storyboardWithName:#"Main" bundle: nil];
MainViewController* mainVC = [mainStoryboard instantiateInitialViewController];
UINavigationController *navVC = [[UINavigationController alloc] initWithRootViewController:mainVC];
[self.window setRootViewController:navVC];
[_window makeKeyAndVisible];
return YES;
}
I have tried things that I thought would be obvious like:
navVC.navigationBar.backgroundColor = [UIColor redColor];
To change the colour or:
[navVC setTitle:#"Test title"];
But nothing changes, the only way I could get the title to change was to change the title of mainVC
[mainVC setTitle:#"Test title"];
Changing the title in the MainViewController.m file itself does nothing.
So how do I modify the UINavigationController (navVC)?
Thanks,
You should be able to set an image to your navigation bar in this way:
UINavigationBar *navBar = navVC.navigationBar;
UIImage *image = [UIImage imageNamed:#"YourNavBarImg.png"];
[navBar setBackgroundImage:image];
and this to change the nav bar tint color:
[navVC.navigationBar setTranslucent:NO];
[navVC.navigationBar setBarTintColor:[UIColor redColor]];
about buttons (UIBarButtonItem) into nav bar:
// where "self" is your current viewcontroller
self.navigationItem.rightBarButtonItems = [NSArray arrayWithObjects:button1,button2, nil];
I have an iPad app I am making, but it crashes on startup even though there are no errors or warnings, the output doesn't output anything besides "(lldb)", and it marks a pointer.
This is the image of the post build crash.
And here is the code:
- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions
{
/* UIImage *myImage = [UIImage imageNamed:#"de_dust2.png"];
myImageView = [[UIImageView alloc] initWithImage:myImage];
myScrollView.contentSize = CGSizeMake(myImageView.frame.size.width, myImageView.frame.size.height);
myScrollView.maximumZoomScale = 4.0;
myScrollView.minimumZoomScale = 0.75;
myScrollView.clipsToBounds = YES;
myScrollView.delegate = self;
// [myScrollView addSubview:myImageView];*/
self.window = [[UIWindow alloc] initWithFrame:[[UIScreen mainScreen] bounds]];
// Override point for customization after application launch.
self.viewController = [[ViewController alloc] initWithNibName:#"ViewController" bundle:nil];
self.window.rootViewController = self.viewController;
[self.window makeKeyAndVisible];
[self.viewController setRed:1];
[self.viewController setGreen:0];
[self.viewController setBlue:0];
[self.viewController setAlpha:1];
[self.viewController checkRotation];
return YES;
}
I now also noticed that the error was given at the [self.window makeKeyAndVisible]; line.
Your code looks ok, the crash could be caused by some exception thrown parsing the XIB file of the window ...
Take a look at the Window in Interface Builder and try to temporary remove all reference to any IBOutlet present in the View Controller ...
I have to create application with two UIWindow (please, don't ask why). First UIWindow's rootViewController supports all orientations. Second one - only portrait and upside down. So application delegate code looks like:
- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions
{
// part one
self.windowOne = [[[UIWindow alloc] initWithFrame:[[UIScreen mainScreen] bounds]] autorelease];
self.windowOne.rootViewController = [[ViewControllerOne alloc] init]; // supports all orientations
self.windowOne.rootViewController.view = [[[UIImageView alloc] initWithImage:[UIImage imageNamed:#"image1.png"]] autorelease];
[self.windowOne makeKeyAndVisible];
//~part one
// part two
self.windowTwo = [[[UIWindow alloc] initWithFrame:[[UIScreen mainScreen] bounds]] autorelease];
self.windowTwo.rootViewController = [[ViewControllerTwo alloc] init]; // supports only portrait and upside down
self.windowTwo.rootViewController.view = [[[UIImageView alloc] initWithImage:[UIImage imageNamed:#"image2.png"]] autorelease];
[self.windowTwo makeKeyAndVisible];
//~part two
return YES;
}
If only one of two parts is active (second one is commented) - everything is ok. But if windowOne has become key and visible before windowTwo, windowTwo rotates as ViewControllerTwo allows, but status bar behaves really weird: it rotates like windowOne is key and visible.
Is there any option to make status bar rotating as ViewControllerTwo says?
Albeit its a hack to me but what you could try is the following:
In your view controllers shouldAutorotateToInterfaceOrientation (for iOS5) or shouldAutorotate (as for iOS6) method add the following code line:
[[UIApplication sharedApplication] setStatusBarOrientation: interfaceOrientation animated: YES];
and test out how the app behaves after that.
to get the interface-orientation in the (new for iOS6) shouldAutorotate method do the following:
UIInterfaceOrientation interfaceOrientation = [[UIDevice currentDevice] orientation];
I didn't test this all out for myself, but it could work.
(Check out some post on how to support autorotation under iOS6)