I used the storyboard to create my application, where the initial View is an TabBarController.
But the first time the application starts I download the database (4Mb). So, my splash screen is displayed until the download is over, because the download is done in AppDelegate. I would like to change it and display a View to the user indicating that a download is being done, not to get the impression that the application crashed.
I tried this in didFinishLaunchingWithOptions: but doesn't work:
LoadViewController *loadView = [[LoadViewController alloc] init];
[self.window makeKeyAndVisible];
[self.window addSubview:[loadView view]];
Thanks in advance.
I am not sure if this will meet your needs but I used MBProgressHUD to handle some display while uploading data to a server, maybe you could do something like the same with your download of the database.
HUD = [[MBProgressHUD alloc] initWithView:[self view]];
[[self view] addSubview:HUD];
HUD.dimBackground = YES;
HUD.delegate = self;
[HUD showWhileExecuting:#selector(taskToDownloadDatabase) onTarget:self withObject:nil animated:YES];
This would allow you to show the user some progress that something is happening and when the database is fully downloaded initialize your view.
Why not download the database outside the appDelegate, then share it with the appdelegate? Or Perhaps do:
[self performSelector#selector(downloadDatabase) afterDelay:1...];
so the view loads first?
Related
I have an universal app that I am trying to share a viewController code with. I have this:
if ([[UIDevice currentDevice] userInterfaceIdiom] == UIUserInterfaceIdiomPhone) {
AboutController *screen = [[AboutController alloc] initWithNibName:#"iPhoneAboutController" bundle:nil];
screen.modalTransitionStyle = UIModalTransitionStyleCrossDissolve;
[self presentModalViewController:screen animated:YES];
}
else
{
AboutController *screen = [[AboutController alloc] initWithNibName:nil bundle:nil];
screen.modalTransitionStyle = UIModalTransitionStyleCrossDissolve;
[self presentModalViewController:screen animated:YES];
}
Although this is loading, and when I step through the code, it does hit the xib for the iPhone but it seems to always be loading the iPad version. I know this because in the xib file for the iPhone, I have manually added different background images and it never shows. In the iPhone simulator it shows the iPad version where it is off screen.
Also, if I step through the code in the controller, it does show that the load is the iPhone yet display is all iPad objects. In the iPhone xib, I do have the Files Owner set to the AboutController.
This is the first time I am attempting to "share code". I know I can just create separate class files with the same code but this seems senseless. Any help is greatly appreciated.
Geo...
For starters: make sure you don't override nib initialization in your AboutController.
If not, try cleaning your project (also delete your app's folders in ~/Library/Developer/Xcode/DerivedData). Also uninstall the app from device and then rebuild.
I am using a tab based application that shows a presentModalViewController called "overview" that has 2 buttons on it .
In order to call it I am using the following code in app delegate:
Overview *overview = [[Overview alloc] initWithNibName:#"Overview" bundle:nil];
[self.tabBarController presentModalViewController:overview animated:YES];
When overview shows up, it has a button called that gets clicked and I am using the following code:
-(IBAction) btnLoginPressed{
[self dismissModalViewControllerAnimated:YES]; //get rid of view
Login *login = [[Login alloc] initWithNibName:#"Login" bundle:nil];
[self.tabBarController presentModalViewController:login animated:YES];
[login release];
}
However the login prsentModalViewController never shows up. Can someone explain why and what I can do to show it?
Thanks
When you present a modal view controller, you do it from the view controller currently in the view.
Assuming your second modal display of a view controller is happening in Overview.m change your code to the following:
-(IBAction) btnLoginPressed {
Login *login = [[Login alloc] initWithNibName:#"Login" bundle:nil];
[self presentModalViewController:login animated:YES];
[login release];
}
You don't need to dismiss Overview first, and in fact you shouldn't as it the animations won't work in conjunction with each other.
When you ultimately dismiss login (or however deep you want to go), you send dismissModalViewController:animated: as high up as you need to. To get back to the tab bar's controller use:
[self.tabBarController dismissModalViewController:animated]
It would be well beyond the scope of your question and the time I have to answer but you should take some time and really study the docs on implementing View Controllers. I definitely recommend following Apple's code style guidelines as one suggestion to make your code much more readable (e.g. overviewViewController vs overview). It's also clear you're just learning so keep at it.
I've been fighting with this for hours. I've searched around everywhere and just can't seem to find the solution to my problem. I'm pretty sure I'm just lacking some key concepts here.
My AppDelegate (didFinishLaunching) basically sets up my window and invokes RootViewController:
// create our window
UIWindow *window = [[UIWindow alloc] initWithFrame:[[UIScreen mainScreen] bounds]];
[window setBackgroundColor:[UIColor blackColor]];
// create our rootviewcontroller
RootViewController *controller = [[RootViewController alloc] init];
// add our rootviewcontroller's view to our window
[window addSubview:controller.view];
// controller is now owned by window's view
[controller release];
// show us to the world
[window makeKeyAndVisible];
When I add controller.view as window's subview, my understanding is that RootVC's loadView will automatically get called.
In RootVC loadView, I create a tabBarController, each tab having a navigationController and it's own viewController. All that is working fine.
In RootVC viewDidLoad, I'm checking to see if this is the first time a user is running this app, and if so, I want to throw up a modal welcome screen. This is the part I'm having trouble with.
I'd like to keep as much code out of the RootVC's viewDidLoad method, and ideally would be able to accomplish what I want with this:
WelcomeViewController *welcome = [[WelcomeViewController alloc] init];
[self presentModalViewController:welcome animated:true];
[welcome release];
Obviously this isn't working. WelcomeVC's loadView hasn't been run yet because I haven't explicitly set it's view property. I've played around with a bunch of different solutions (welcome.view - [[UIView....], using WelcomeVC's init method to set self.view) but I just can't seem to get that modal to pop up.
How should I accomplish what I'm looking for? What are the best practices, and what's the best solution to keep my code tight and tidy?
I'm stuck, so hopefully your solution will allow me to continue developing my app!
Although the problem is not so simple, the solution is. You have to wait until the main view appears. So check the condition and present your modal view in viewDidAppear method, not in viewDidLoad method.
This question already has answers here:
iPhone Shake event not properly working
(2 answers)
Closed 2 years ago.
I am writing some application (let's say game - 1 view no cocoa controls) which needs to detect shakes.
As beginner with IOS have started with default openGL template (new one). Application works.
I have decided to add shakes. "motionBegan" don't work on "EAGLEview", so I have created view controller. Touches worked but "motionBegan" still not worked. (same like "viewDidAppear")
I thought that somehow IBuilder file is overlapping it.
So I have decided to resign from my IBuilder file and move forward without.
What I have now is:
main.m
int retVal = UIApplicationMain(argc, argv, nil, #"SimplePianoAppDelegate");
SimplePianoAppDelegate.m
window = [[UIWindow alloc] initWithFrame:[UIScreen mainScreen].bounds];
[window setUserInteractionEnabled:YES];
[window setMultipleTouchEnabled:YES];
viewController = [[InputControler alloc] init];
glView=[[EAGLView alloc] initWithFrame:window.bounds];
glView.hidden=NO;
viewController.view=glView;
[window bringSubviewToFront:glView];
[window addSubview:viewController.view];
[window makeKeyAndVisible];
[glView setMultipleTouchEnabled:YES];
[glView performSelectorOnMainThread:#selector(mainAppLoop) withObject:nil waitUntilDone:NO];
With this code touches and motions worked but I don't see anything. (just white screen) :(
I am sure that some of the lines above are not necessary, but I am trying all possible options. What is strange is that no matter if I create my glView or not "loadView" in viewcontroller is not called.
Thank you for help in advance.
Mariusz
while I have connected view outlet in view with controller it started to work... with this:
[self becomeFirstResponder]
I have a tab bar application and I want to display those views that most part of apps have, with the name of the company or the name of the app.
I've created the follow viewController
Introduction *introducao = [[Introduction alloc] initWithNibName:#"Introduction" bundle:nil];
I don't know where exactly should I insert the code to show the modal because I have a tab bar application:
[self.navigationController presentModalViewController:galeria animated:YES];
I've tried to insert these lines on appDelegate.. but didn't work.. somebody have an idea?
if you are trying to show a splash screen right when the application opens, you should use a Default.png image instead of a view controller showing an image. Check out the Apple Documentation on Human Interface Guidelines and Beginning iPhone Development.
First of all, you'll need to ensure that you have a navigation controller present to present the model view from. Otherwise in the above code you'll be messaging nil and nothing will happen. Then you'll want to put the presentModalViewController:animated: call in your app delegate's applicationDidFinishLaunching: implementation.
Thanks for all answers.. they were very useful to understand better the process..
I have found a solution that does exactly what I need! So if someone need to create those splash screens with a sequence of images it is very useful:
Just create a ImageView on the Delegates Header and do the following:
splashView = [[UIImageView alloc] initWithFrame:CGRectMake(0, 0, 320, 480)];
splashView.image = [UIImage imageNamed:#"Default.png"];
[window addSubview:splashView];
[window bringSubviewToFront:splashView];
to control the duration of the splash screen:
[self performSelector:#selector(removeSplash) withObject:nil afterDelay:1.5];
To remove the splash:
-(void)removeSplash;
{
[splashView removeFromSuperview];
[splashView release];
}
so If you want to create a sequence of image just create a method to change the splashView.image.. and create a NSTIMER to call it..