This is the code I'm using to present a modal view when the app first starts
- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {
self.window.rootViewController = self.tabBarController;
[self.window makeKeyAndVisible];
Security *security = [[Security alloc] initWithNibName:#"Security" bundle:nil];
[self.tabBarController.selectedViewController presentModalViewController:security animated:YES];
[security release];
return YES;
}
This is what the log says
Unbalanced calls to begin/end appearance transitions for <UITabBarController: 0x171320>.
Is there a better way to achieve this?
Also I have this method in my app delegate
-(BOOL)tabBarController:(UITabBarController *)tabBarController shouldSelectViewController:(UIViewController *)viewController {
if (viewController == [tabBarController.viewControllers objectAtIndex:2]) {
//The Log Out tab locks the app by presenting a modalviewcontroller that can't be dismissed unless there is a password.
Security *security = [[Security alloc] initWithNibName:#"Security" bundle:nil];
[self.tabBarController presentModalViewController:security animated:YES];
[security release];
return NO;
} else {
return YES;
}
}
Basically one of the options on my tabbarcontroller is a logout button. The above code works fine and doesn't throw a warning to the log.
Why are you presenting it from your tab bar controller? Assuming your above code is from a UIViewController, try
[self presentModalViewController:security animated:YES];
or
[self.navigationController presentModalViewController:security animated:YES];
Related
I have a MBProgressHUD that I want to display when switching tabs. This is in my app delegate. I have this code here to display the HUD on only the first three tabs
-(void)tabBarController:(UITabBarController *)tabBarController didSelectViewController:(UIViewController *)viewController{
if ([viewController isKindOfClass:[UINavigationController class]]) {
if (tabBarController.selectedIndex >= 3) {
UINavigationController *nav = (UINavigationController *) viewController;
[nav popToRootViewControllerAnimated:NO];
}
else {
UINavigationController *nav = (UINavigationController *) viewController;
HUD = [[MBProgressHUD alloc] initWithView:nav.view];
[nav.view addSubview:HUD];
HUD.labelText = #"Loading";
[HUD show:YES];
[nav popToRootViewControllerAnimated:NO];
}
}
}
The first time I view my page it works but going back to it a second time it doesn't hide. I have my [appDel.HUD hide:YES afterDelay:1.0]; in my viewDidAppear.
How can I get the HUD to hide every time I visit the page?
I think you may be adding the MBProgressHUD to a different view within the UINavigationController. Then you're popping to the root, and it's trying to remove an MBProgressHUD that doesn't exist. Try this (untested code)...
UINavigationController *nav = (UINavigationController *) viewController;
[nav popToRootViewControllerAnimated:NO];
if(![nav.visibleViewController.view.subViews containsObject:MBProgressHUD])
{
[MBProgressHUD showHUDAddedTo:nav.visibleViewController.view animated:YES];
MBProgressHUD.labelText = #"Loading";
}
else
{
[MBProgressHUD setHidden:NO];
}
you have to check if the MBProgressHUD view was already activated if so hid it, or simply do so:
if (!HUD) {
[self showLoadingHUD];
}
Background: App has a shake to go home feature. Home view Only supports portrait.
If you shake a bit harder than usual, the view that you are on starts to rotate (which is fine) , but then it detects a shake and does a popViewControlller to the home view. When it does this it loads the navigation controller just fine, but the view under (the home content) gets loaded behind the bar and is stretched up (it's basically loading underneath the navigation bar, so it gets stretched up)
The back button handles this just fine from landscape to portrait (since its not mid transitions)
How should I go about handling this orientation change (from the shake) so I can pop back into the root view controller, without the view loading under the navigation bar?
Edit:What's happening is the content thinks that it has the entire view to load, so it stretches itself to take the entire screen, not realizing theres a navigationbar above it. I can tell since the images loading are stretched out
added a bounty of 50.
Edit Here's How I'm detecting Shakes and Popping
- (void)motionEnded:(UIEventSubtype)motion withEvent:(UIEvent *)event
{
if ( event.subtype == UIEventSubtypeMotionShake )
{
UINavigationController *navController = self.navigationController;
[[self retain] autorelease];
HomeViewController *home = [[HomeViewController alloc]init];
[navController popViewControllerAnimated:YES];
home.title =#"Home View Controller";
[home release];
}
if ( [super respondsToSelector:#selector(motionEnded:withEvent:)] )
[super motionEnded:motion withEvent:event];
}
Here's my App Delegate:
- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions
{
navController = [[UINavigationController alloc]init];
[self.window addSubview:navController.view];
HomeViewController *home = [[HomeViewController alloc]init];
[[self home] setFrame:[[UIScreen mainScreen] applicationFrame]];
I'll include a mockup here.
Normal View:
Stretched View After a Shake/Pop:
- (void)willRotateToInterfaceOrientation:(UIInterfaceOrientation)toInterfaceOrientation duration:(NSTimeInterval)duration {
}
- (void)didRotateFromInterfaceOrientation:(UIInterfaceOrientation)fromInterfaceOrientation
{}
- (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation
{
// Return YES for supported orientations
return YES;
}
I'm a bit puzzled by your code so I'd really suggest starting from the beginning. As Lukya mentioned, there's no reason to recreate the HomeViewController. I'm also baffled by the "[[self retain] autorelease];" bit. That shouldn't be necessary unless you're doing something incorrectly elsewhere.
So I would start with this... In application:didFinishLaunchingWithOptions: do something like this:
- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions
{
HomeViewController *home = [[[HomeViewController alloc] init] autorelease];
UINavigationController *navController = [[[UINavigationController alloc] initWithRootViewController:home] autorelease];
[self.window addSubview:navController.view];
}
The window will retain a your nav controller and the nav controller will retain your HomeViewController.
Then in motionEnded:withEvent: do something like:
- (void)motionEnded:(UIEventSubtype)motion withEvent:(UIEvent *)event
{
if (event.subtype == UIEventSubtypeMotionShake)
{
[self.navigationController popViewControllerAnimated:YES];
}
}
That should be it.
If that does not work then can you give any other info? For example, does HomeViewController implement (and return YES) in shouldAutorotateToInterfaceOrientation:? If so, can you return no so it doesn't rotate since your first line says "Home view Only supports portrait"?
Edit: An example of willRotateToInterfaceOrientation:duration: and didRotateFromInterfaceOrientation: as well.
In the header for whatever controller you're detecting shakes in add a boolean:
BOOL isRotating;
In your implementation file add the two UIViewController methods we want to override -- something like:
- (void)willRotateToInterfaceOrientation:(UIInterfaceOrientation)toInterfaceOrientation duration:(NSTimeInterval)duration {
[super willRotateToInterfaceOrientation:toInterfaceOrientation duration:duration];
isRotating = YES;
}
- (void)didRotateFromInterfaceOrientation:(UIInterfaceOrientation)fromInterfaceOrientation {
[super didRotateFromInterfaceOrientation:fromInterfaceOrientation];
isRotating = NO;
}
Now, do something like this for your event handler:
- (void)motionEnded:(UIEventSubtype)motion withEvent:(UIEvent *)event
{
if (event.subtype == UIEventSubtypeMotionShake && !isRotating)
{
[self.navigationController popViewControllerAnimated:YES];
}
}
in your home view controller's xib, go to the inspector for the view and set top bar as navigation bar.. and in view did load set self.navigationBarHidden = NO;...
NOTE:
there are many thing wrong with the code you've posted.. but none of them causes the orientation problem... in fact this seems to be the only code you need in that method:
- (void)motionEnded:(UIEventSubtype)motion withEvent:(UIEvent *)event
{
if (event.subtype == UIEventSubtypeMotionShake)
{
[navController popViewControllerAnimated:YES];
}
}
so you might want to change this code as well..
Have you tried calling [[UIApplication sharedApplication] setStatusBarOrientation: UIInterfaceOrientationPortrait animated:YES]; in your home view controller? You could also try to place this in where you detect a shake.
I have come across this issue with underlapping the navigation bar. I am not sure what causes it but you can work around it by calling,
[[self loadingView] setFrame:[[UIScreen mainScreen] applicationFrame]];
after the problem view is added to window in the application delegate.
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 trying to do something pretty easy, in my estimation:
- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions
{
prefs = [NSUserDefaults standardUserDefaults];
BOOL IsLoggedIn = [prefs boolForKey:#"IsLoggedIn"];
if(IsLoggedIn == NO)
{
//Show login controller
LoginViewController *lvc = [[LoginViewController alloc] initWithNibName:nil bundle:nil];
[self.tabBarController presentModalViewController:lvc animated:NO];
[lvc release];
}
else if(IsLoggedIn == YES)
{
//Continue doing crap
}
// Override point for customization after application launch.
// Add the tab bar controller's current view as a subview of the window
self.window.rootViewController = self.tabBarController;
NSArray *tabs = self.tabBarController.viewControllers;
UIViewController *tbInvoice = [tabs objectAtIndex:0];
tbInvoice.tabBarItem.image = [UIImage imageNamed:#"Open-Mail.png"];
UIViewController *tbClient = [tabs objectAtIndex:1];
tbClient.tabBarItem.image = [UIImage imageNamed:#"Breifcase.png"];
[self.window makeKeyAndVisible];
return YES;
}
When using the debugger, I see it enter if(IsLoggedIn == NO) and run the LoginViewController code, but the view never shows.
It's driving me crazy.
I tried running the code after [self.windoow makeKeyAndVisible], but it didn't change anything.
This code looks like every example I've seen. Can anyone see what I'm doing wrong?
Thanks in advance,
Clif
I came up with this:
- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions
{
//...
if(!loggedIn)
{
// Launch the app with login controller as the rootController
self.window.rootViewController = loginController;
// ...but switch to the original controller as soon as the UI is presented
dispatch_async(dispatch_get_main_queue(), ^{
self.window.rootViewController = originalRootController;
// ...and silently present the login controller again with no noticeable changes
[originalRootController presentViewController:loginController
animated:NO
completion:NULL];
});
}
Hpoe this post will give you some idea.
I have a MKMapView (also a UIPopoverControllerDelegate) with Annotations. This MapView has, in the MKTestMapView.h file, a UIPopoverController* popoverController defined in the #interface and a #property (nonatomic, retain) UIPopoverController* popoverController; defined outside of the #interface section. This controller is #synthesized in the MKTestMapView.m file and it is released in the - (void)dealloc section. The Annotations in this MapView have rightCalloutAccessoryViews defined to the following:
- (void)mapView:(MKMapView *)mapView2 annotationView:(MKAnnotationView *)aview calloutAccessoryControlTapped:(UIControl *)control{
...
CGPoint leftTopPoint = [mapView2 convertCoordinate:aview.annotation.coordinate toPointToView:mapView2];
int boxDY=leftTopPoint.y;
int boxDX=leftTopPoint.x;
NSLog(#"\nDX:%d,DY:%d\n",boxDX,boxDY);
popoverController = [[UIPopoverController alloc] initWithContentViewController:controller];
popoverController.delegate = self;
CGSize maximumLabelSize = CGSizeMake(320.0f,600.0f);
popoverController.popoverContentSize = maximumLabelSize;
CGRect rect = CGRectMake(boxDX, boxDY, 320.0f, 600.0f);
[popoverController presentPopoverFromRect:rect inView:self.view permittedArrowDirections:UIPopoverArrowDirectionRight animated:YES];
...
}
Now here comes the fun part. First of all, I am not sure if I need maximumLabelSize and the rect to be the same size. I am new to the popovercontroller so I am playing this by ear..
Okay, the popover shows. Now to dismissing it. I can click anywhere on mapView2 and the popover goes away...but I need the user to click a button in the view if they change anything. URGH!
The docs show:
To dismiss a popover programmatically,
call the dismissPopoverAnimated:
method of the popover controller.
Well, here is the problem: By definition of how the popoverController works, you are clicking inside the view of the displayed popover (to click the button) but have to trigger the dismissPopoverAnimated: method of the controller that launched this popover view, in my case, the popoverController inside the MKTestMapView.m file.
Now, having said all that, remember, [popoverController release] doesn't happen until:
- (void)dealloc {
[popoverController release];
[mapView release];
[super dealloc];
}
So, do i just do the following inside the button (messy but may work):
(Assuming my popover view is a TableView) In the:
- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath {
MKTestMapView * mKTestMapView = [[MKTestMapView alloc] init];
[[mKTestMapView popoverController].dismissPopoverAnimated:YES];
}
Here is my issue: I cannot figure out whether doing the above gives me a reference (if there is such a thing) to the existing view that is on the screen -- and therefore the view that is the owner of that popoverController. If it is as simple as
[[[self parentView] popoverController].dismissPopoverAnimated:YES];
I will shoot myself cos I don't think that is the correct syntax either!
This should be easy...yet I am lost. (probably just frustrated with so many iPad differences that I am learning).
Can anyone explain more?
I had the same problem... I had a neat "close" button (X) in the top of my view loaded by the popover, but it didn't work. In my universal app it will be presented as a new view, so that code should stay.
What I did now was that I added the following to my detailedPinView (the view the popover loads):
in the detailedPinView.h file:
#interface detailedPinView : UIViewController {
[...]
UIPopoverController *popover;
[...]
}
-(void)setPopover:(UIPopoverController*)aPopover;
In the detailedPinView.m file:
- (void)setPopover:(UIPopoverController*)aPopover
{
popover = aPopover;
}
The X button closes the view using an IBAction, this is what I did there:
In the detailedPinView.m file:
-(IBAction)releaseDetailedView:(UIButton *)sender
{
if (UI_USER_INTERFACE_IDIOM() == UIUserInterfaceIdiomPad)
{
if (popover != nil)
{
[popover dismissPopoverAnimated:YES];
}
else {
NSLog(#"Nothing to dismiss");
}
}
else{
[self.parentViewController dismissModalViewControllerAnimated: YES];
}
}
In the class loading the my map and the popover view I added the following code:
[...]
-(void)mapView:(MKMapView *)theMapView annotationView:(MKAnnotationView *)pin calloutAccessoryControlTapped:(UIControl *)control
{
UIViewController *detailController = [[detailedPinView alloc] initWithNibName:#"detailedPinView"
bundle:nil
annotationView:pin];
if (UI_USER_INTERFACE_IDIOM() == UIUserInterfaceIdiomPad)
{
UIPopoverController* aPopover = [[UIPopoverController alloc] initWithContentViewController:detailController];
[aPopover setDelegate:self];
[aPopover setPopoverContentSize:CGSizeMake(320, 320) animated:YES];
[detailController setPopover:aPopover];
[detailController release];
[mapView deselectAnnotation:pin.annotation animated:YES];
self.popoverController = aPopover;
[mapView setCenterCoordinate:pin.annotation.coordinate animated:YES];
[self.popoverController presentPopoverFromRect:CGRectMake(382,498,0,0) inView:self.view permittedArrowDirections:UIPopoverArrowDirectionUp animated:YES];
}
else
{
[self presentModalViewController: detailController animated:YES];
}
[detailController release];
}
[...]
I don't know if the was the answer you were hoping for, I think it might be a bit of a messy way to do it... but giving the time schedule this worked like a charm :)
Here is another simple solution.
I found that we should follow the following steps for clearly dismissing popovers.
dismiss a popover.
release a view loaded by the popover.
Before iOS8, almost all of us may release a view loaded by a popover first, and then we programmatically dismiss the popover.
However, in iOS8, we do the steps in revers.
Before iOS8, my code of dismissing a popover
// creating a popover loading an image picker
picker = [[UIImagePickerController alloc] init];
...
pickerPopover = [[UIPopoverController alloc] initWithContentViewController:picker];
[pickerPopover presentPopoverFromRect:aFrame inView:aView permittedArrowDirections:UIPopoverArrowDirectionAny animated:YES];
// dismissing the popover
[picker.view removeFromSuperview]; // (1) release a view loaded by a popover
[picker release], picker = nil;
if( UI_USER_INTERFACE_IDIOM() == UIUserInterfaceIdiomPad ) {
[pickerPopover dismissPopoverAnimated:YES]; // (2) dismiss the popover
}
In iOS8, the dismissing code part should be changed as below,
if( UI_USER_INTERFACE_IDIOM() == UIUserInterfaceIdiomPad ) {
[pickerPopover dismissPopoverAnimated:YES]; // (2) dismiss the popover first
}
[picker.view removeFromSuperview]; // (1) and then release the view loaded by the popover
[picker release], picker = nil;