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Making the launch image display longer xcode
(8 answers)
Closed 6 years ago.
How would I make the splash screen stay for longer, 5 seconds, for example?
Write sleep(5.0) in your
- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions method.
- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {
/*this will pause main thread for x interval seconds.
put on the top of application:didFinishLaunchingWithOptions, so it will not
proceed to show window until sleep interval is finished.*/
[NSThread sleepForTimeInterval:5]; //add 5 seconds longer.
//other code....
}
You need to create a view controller for displaying the splash screen as done below.
- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions
{
[self generateRandomSplashScreen];
[self performSelector:#selector(removeSplashScreen) withObject:nil afterDelay:SPLASHSCREEN_DELAY];
[self otherViewControllerLoad]; // the other view controller
[self.window makeKeyAndVisible];
return YES;
}
-(void) generateRandomSplashScreen
{
splashScreenViewController = [[SplashScreenController alloc] initWithNibName:#"SplashScreenController" bundle:[NSBundle mainBundle]];
[self.window addSubview:self.splashScreenViewController.view];
}
-(void) removeSplashScreen
{
[splashScreenViewController.view removeFromSuperview];
self.window.rootViewController = self.tabBarController;
[splashScreenViewController release];
}
Probably the splash screen you are talking about is "default.png" file. As JustSid mentioned, this file is not intended to be splash screen, rather to be used as a first screen snapshot to improve user experience concerning application loading time. Check human interface guideline
http://developer.apple.com/library/ios/documentation/userexperience/conceptual/mobilehig/IconsImages/IconsImages.html#//apple_ref/doc/uid/TP40006556-CH14-SW5
If you want to implement splashscreen, you should use ie. NSTimer and UIView components.
Related
just to test it I enabled the activity indicator of the status bar as follows:
- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions
{
[[UIApplication sharedApplication] setNetworkActivityIndicatorVisible: TRUE];
//...
}
I never disable the indicator so it should always be visible, but it isn't. It is visible in the iPhone Simulator but not on the device. Why?
Please not that the application is not active when a call is made to didFinishLaunchingWithOptions. You should move this to the viewDidLoad method instead. Thus the code should look like this:
- (void)viewDidLoad {
[[UIApplication sharedApplication] setNetworkActivityIndicatorVisible:YES];
// Some other code goes here...
[super viewDidLoad];
}
Or you could put this code anywhere else where the view has been loaded. Do not forget to stop it once the data has been loaded.
Please tell me can I use a time while application is loading (while splash screen is being showed) to perform some background operations? (I need to call CLLocationManager and update current location) If I'm allowed to do it please tell me where to put a code.
It is not possible to perform anything while real splash screen is shown.
Your actions starts in
- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions
method which is executed when splash screen removed.
If you want to perform some time-cost operation before showing user interface, your only options is show manually "fake" splash screen during this time. It can be image or anything else e.g. activity indicator or animation. If you use same image that used for splash screen,
user will see no difference, it will look like splash screen will remain some seconds longer for him, but you will already have your data loaded.
In this case your app delegate may be like this:
- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions
{
self.window = [[UIWindow alloc] initWithFrame:[[UIScreen mainScreen] bounds]];
self.viewController = [[ViewController alloc]
initWithNibName:#"FakeSplashViewController" bundle:nil];
self.window.rootViewController = self.viewController;
[self performSelectorInBackground: #selector(someLongOperation) withObject: nil];
[self.window makeKeyAndVisible];
return YES;
}
- (void) someLongOperation{
//doing something
//...
[self performSelectorOnMainThread:#selector(atLastLoadGUI) withObject:nil waitUntilDone:NO];
}
- (void) atLastLoadGUI{
// start GUI
}
I have made a view based application which is loading a default view ...
My default view is a splash screen ..
What I want to achieve is once default view (splash view) finished loading, after few seconds it loads another view which is either a privacy policy or application screen.
Code in AppDelegate.m
- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions
{
// Override point for customization after application launch.
self.window.rootViewController = self.viewController;
[self.window makeKeyAndVisible];
return YES;
}
No Change as usual ...
Above code load a view from splashscreen.xib file
Following code is in splashscreen.m
- (IBAction)loadPrivacyScreen {
NSLog(#"Switching To Another View");
PrivacyPolicyView *modal = [[PrivacyPolicyView alloc]initWithNibName:nil bundle:nil];
modal.modalTransitionStyle = UIModalTransitionStyleFlipHorizontal;
[self presentModalViewController:modal animated:YES];
[modal release];
}
- (void)viewDidLoad {
[super viewDidLoad];
sleep(3);
[self loadPrivacyScreen];
// Do any additional setup after loading the view from its nib.
}
After three second it does get in to the loadPrivacyScreen funciton but doesn't load the view.
- (IBAction)loadPrivacyScreen;
I have created a method as IBAction because I want to hook that method with a button on privacy screen to check that function works ...
And surprisingly it works when you click the button. But it doest work on time.
Can anyone suggest me what am I doing wrong ?? or any other alternative to achieve same thing??
Note: I have also try changing
- (IBAction)loadPrivacyScreen;
to
- (void)loadPrivacyScreen;
But still same result. It is not switching ....
First of all iOS provides a simple way to load a splash screen.
Just add a Image with 320x480 resolution in the name called default.png and add that to your project it will automatically use this image as splash screen image.
In your way call the loadPrivacy screen with a timer.
- (void)viewDidLoad {
[super viewDidLoad];
NSTimer *theTimer = [NSTimer scheduledTimerWithTimeInterval:3.00 target:self selector:#selector(loadPrivacyScreen) userInfo:nil repeats:NO];
}
- (void)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {
// Override point for customization after application launch.
self.window.rootViewController = self.viewController;
[self.window makeKeyAndVisible];
[viewController showSplash];
}
And in the view controller, define a method like
> IBOutlet UIView *modelView;
- (void)showSplash;
- (void)hideSplash;
-(void)showSplash {
UIViewController *modalViewController = [[UIViewController alloc] init];
modalViewController.view = modelView;
[self presentModalViewController:modalViewController animated:NO];
[self performSelector:#selector(hideSplash) withObject:nil afterDelay:2.0];
}
//hide splash screen
- (void)hideSplash {
[[self modalViewController] dismissModalViewControllerAnimated:YES];
}
I am loading my second screen with delay of 2 second. But I want to show my first screen as well for 2 second and after 2 second my second screen should be load. I have written code
[NSThread sleepForTimeInterval:2.0];
for delay. But my MainWindow is not appearing. I have written code inside of the function
- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {
....
}
Where to write the code to show first screen for 2 second.
Thanks in advance.
You can use NSTimer for swap views like the following:
You can setup the Timer on:
-(void) swapViews{
// add the second screen as subview of the app window.
}
(BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {
// add the first screen as subview of the app window.
[NSTimer scheduledTimerWithTimeInterval:2.0
target:self
selector:#selector(swapViews:)
userInfo:nil
repeats:NO];
}
Use this method too
[self performSelector:#selector(test) withObject:nil afterDelay:2];
With multi-tasking in iOS4, the home button puts the app into background and when it comes back into foreground I want the View Controller to 'refresh' (and hence viewWillAppear to be called). I put this in the app delegate thought this should work but nothing happens
- (void)applicationDidFinishLaunching:(UIApplication *)application {
//
[window addSubview:viewController.view];
[window makeKeyAndVisible];
}
- (void)applicationWillEnterForeground:(UIApplication *)application {
[viewController.view reloadInputViews];
}
Can anyone help me with forcing a view controller to 'execute'/refresh when it is already showing?
You could call viewWillAppear explicitly e.g.
- (void)applicationWillEnterForeground:(UIApplication *)application {
[viewController.view reloadInputViews];
[viewController viewWillAppear];
}