I'm making an ios app, I want to make all pages are landspace.
The first page is landspace, but the second page is portrait (going the second page via button).
How to make it landspace.
(I'm not using storyboard)
Button click event:
PanelController *panel = [[PanelController alloc] init];
[self.navigationController pushViewController:panel animated:true];
How about this ?
-(void)viewWillAppear:(BOOL)animated
{
UIApplication* application = [UIApplication sharedApplication];
if (application.statusBarOrientation != UIInterfaceOrientationPortrait)
{
UIViewController *controller = [[UIViewController alloc]init];
[controller.view setBackgroundColor:[UIColor whiteColor]];
[self.navigationController presentViewController:controller animated:NO completion:^{
[self.navigationController dismissViewControllerAnimated:YES completion:^{
}];
}];
}
The correct technique for changing orientation should be this:
- (BOOL)shouldAutorotate
{
return YES;
}
- (NSUInteger)supportedInterfaceOrientations
{
return UIInterfaceOrientationMaskLandscape;
}
Related
The first screen of my app consists of the login screen. I am displaying the login screen from AppDelegate.
The login screen comes up and I am able to go to next screen in the simulator. But it doesn't work on device.
On device, the main screen comes up for a second and the login screen is displayed. I tried changing the order of [self.window.rootViewController dismissViewControllerAnimated:YES completion:nil]; and [self.window.rootViewController presentViewController:self.navigationController animated:YES completion:nil]; but that doesn't work either.
I am running on a iOS 9.0 iPad (device). Everything seems fine on simulator though.
- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {
self.window = nil;
self.window = [[UIWindow alloc] initWithFrame:[[UIScreen mainScreen] bounds]];
self->_loginViewController = [[LoginViewController alloc] initWithNibName:nil bundle:nil];
self.window.rootViewController = nil;
self.window.rootViewController = self->_loginViewController;
[self.window makeKeyAndVisible];
return YES;
}
- (void)loginUser {
if([UIDevice currentDevice].userInterfaceIdiom == UIUserInterfaceIdiomPad) {
//load xib for iPad
mainVC = [[MainVC alloc] initWithNibName:#"MainVC~ipad" bundle:nil];
} else if([UIDevice currentDevice].userInterfaceIdiom == UIUserInterfaceIdiomPhone) {
//load xib for iPhone
mainVC = [[MainVC alloc] initWithNibName:#"MainVC~iphone" bundle:nil];
}
self.navigationController = nil;
self.navigationController = [[UINavigationController alloc] initWithRootViewController:mainVC];
dispatch_async(dispatch_get_main_queue(),^ {
// [self.window.rootViewController.navigationController popViewControllerAnimated:YES]; //not working
[self.window.rootViewController dismissViewControllerAnimated:YES completion:nil]; //not working
[self.window.rootViewController presentViewController:self.navigationController animated:YES completion:nil];
//not working
// [self.window.rootViewController.presentingViewController dismissViewControllerAnimated:YES completion:^{
// [self.window.rootViewController presentViewController:self.navigationController animated:YES completion:nil];
// }];
});
}
First thing is you are setting up LoginViewController as the rootController of the window which is fine. In your login method you are trying to dismiss a controller when none is presented here(assuming you have not presented any other controller). You can remove that line and just present the navigation controller.
For this purpose, I normally change my rootViewController. In your case, when your user has logged on replace:
[self.window.rootViewController dismissViewControllerAnimated:YES completion:nil]; //not working
[self.window.rootViewController presentViewController:self.navigationController animated:YES completion:nil];
with:
self.window.rootViewController = self.navigationController;
And then on user logout do:
self.window.rootViewController = self.loginViewController;
In iOS 8, when presenting a modal (lets say with a transparent background), we need to set the segue (or the modal) to use the presentation style of UIModalPresentationOverCurrentContext. This is working as expected.
To accomplish the same thing for iOS 7, you instead, need to set the presenting view controller to have a modal presentation style of UIModalPresentationCurrentContext. Here's where I'm having an issue. I present the modal with animation, but it doesn't animate. After it is presented, everything works fine, even animating the dismissal. Further, if I change the presentation style to UIModalPresentationFullScreen, it animates correctly.
I've searched around and read other posts, but I can't find the cause of this or a solution.
ViewController *vcObj = [[ViewController alloc] initWithNibName:NSStringFromClass([ViewController class]) bundle:nil];
UINavigationController *navCon = [[UINavigationController alloc] initWithRootViewController:vcObj];
if ([[UIDevice currentDevice].systemVersion floatValue] >= 8.0) {
navCon.providesPresentationContextTransitionStyle = YES;
navCon.definesPresentationContext = YES;
navCon.modalPresentationStyle = UIModalPresentationOverCurrentContext;
[self presentViewController:navCon animated:NO completion:nil];
}
else {
AppDelegate *appDelegate = (AppDelegate *)[[UIApplication sharedApplication] delegate];
[self presentViewController:navCon animated:NO completion:^{
[navCon dismissViewControllerAnimated:NO completion:^{
appDelegate.window.rootViewController.modalPresentationStyle = UIModalPresentationCurrentContext;
[self presentViewController:navCon animated:NO completion:nil];
appDelegate.window.rootViewController.modalPresentationStyle = UIModalPresentationFullScreen;
}];
}];
}
When a user presses the center UITabBarItem I present a modal UIView. Think of it like Instagram.
-(BOOL)tabBarController:(UITabBarController *)tabBarController shouldSelectViewController:(UIViewController *)viewController{
if(viewController == [self.viewControllers objectAtIndex:2])
{
CameraViewController *cameraVC = [[UIStoryboard storyboardWithName:#"Main" bundle:nil] instantiateViewControllerWithIdentifier:#"cameraVC"];
UINavigationController* navController = [[UINavigationController alloc] initWithRootViewController:cameraVC];
navController.navigationBar.barStyle = UIStatusBarStyleLightContent;
[self presentViewController:navController animated:YES completion:nil];
return NO;
}
else
{
return YES;
}
}
This works perfectly.
When I'm done taking a picture in CameraViewController I want the view to be dismissed and the 4th UITabBarItem to be selected for the results of the picture (HistoryViewController).
This is how I do that in CameraViewController (who is modally pushed):
[self dismissViewControllerAnimated:YES completion:nil];
[(UITabBarController *)self.presentingViewController setSelectedIndex:3];
And this is where it gets buggy.
As you can see the text in the 4th tab is selected, but the first tab icon is still selected. Also the presented view is the one from the first tab.
After 10 seconds or so it eventually changes the view to the, correct, 4th tab.
I'm trying to find out what process creates this slowdown so I've set up a lot of NSLog's.
The approximate 10 second slowdown is between [(UITabBarController *)self.presentingViewController setSelectedIndex:3]; in the CameraViewController and viewDidLoad in HistoryViewController.
What is happening in between these calls/methods that could cause the slowdown?
Edit:
In CameraViewController:
- (void)scan {
dispatch_queue_t scanTesseract = dispatch_queue_create("scanTesseract", NULL);
dispatch_async(scanTesseract, ^(void) {
dispatch_async(dispatch_get_main_queue(), ^{
[SVProgressHUD setForegroundColor:[UIColor ht_mintDarkColor]];
[SVProgressHUD showProgress:0 status:#"Scanning"];
});
//background processing goes here
[self.tesseract setImage:self.imgToScan.blackAndWhite];
[self.tesseract recognize];
[self filterResults:[self.tesseract recognizedText]];
dispatch_async(dispatch_get_main_queue(), ^{
[SVProgressHUD dismiss];
});
[self scanningDone];
});
}
- (void)scanningDone {
[LastScan getInstance].hasBeenViewed = FALSE;
[self dismissViewControllerAnimated:YES completion:nil];
[(UITabBarController *)self.presentingViewController setSelectedIndex:3];
}
In HistoryViewController:
- (void)viewDidLoad {
[super viewDidLoad];
NSLog(#"ViewDidLoad");
self.navigationController.navigationBar.barStyle = UIStatusBarStyleLightContent;
self.collectionView.backgroundColor = [UIColor whiteColor];
}
You are calling your scanningDone from within a background queue. Execute that method on the main Queue.
dispatch_async(dispatch_get_main_queue(), ^{
[self scanningDone];
});
What about this?
[self dismissViewControllerAnimated:YES completion:^{
[(UITabBarController *)self.presentingViewController setSelectedIndex:3];
}];
I am making an app with different view controllers. My home screen is in main.storyboard. Rest of the view controllers have their own xib, .h & .m files. I am trying this for navigation from home screen.
-(IBAction)btnSignUpTapped:(id)sender
{
SignUpWithEmailViewController * login = [[SignUpWithEmailViewController alloc] init];
UINavigationController *nav = [[UINavigationController alloc]
initWithRootViewController:login];
[self presentViewController:nav animated:YES completion:NULL];
}
This code works fine for navigating to different viewcontroller (in this case SignUpwithEmailViewController). On SignUpWithEmailViewController I have a back button which is supposed to bring me back to home screen. This is what I got so far:
-(IBAction)btnBackTapped:(id)sender
{
ViewController * homeScreen = [[ViewController alloc] init];
UINavigationController *nav = [[UINavigationController alloc]
initWithRootViewController:homeScreen];
[self presentViewController:nav animated:YES completion:NULL];
}
But as result of this code, screen turns black and nothing happens. How do I solve this problem? For hiding the nav bar I am using
-(void) viewWillAppear:(BOOL)animated
{
[[self navigationController] setNavigationBarHidden:YES animated:NO];
}
Yes, you have to insert you called viewController to NavigationController,
but if you wont to use modal flow - to close presentedViewController just call:
[self dismissViewControllerAnimated:YES completion:^{
}];
EDITED:
may be it will be more helpful, it just example, put it to you main view controller:
- (void)viewDidAppear:(BOOL)animated
{
[super viewDidAppear:animated];
UIViewController *c = [[UIViewController alloc] init];
c.view.backgroundColor = [UIColor redColor];
[self presentViewController:c animated:YES completion:^{
[self dismissViewControllerAnimated:YES completion:^{
}];
}];
}
I have implemented a delegate for the SKStoreProductViewController.
I add that view controller into the key window's view controller.
I have also implemented a dismiss view controller code in the delegate function.
The question seems to be answer in this question.
Modal App Store won't dismiss
Yet, this problem still persist in my situation.
Display function
if (floor(NSFoundationVersionNumber) > NSFoundationVersionNumber_iOS_6_1) {
NSString *appURL = [NSString stringWithFormat:#"itms-apps://itunes.apple.com/%#/app/id%#",
[[NSLocale preferredLanguages] objectAtIndex:0], applicationID];
[[UIApplication sharedApplication] openURL:[NSURL URLWithString:appURL]];
} else {
NSDictionary* dict = [NSDictionary dictionaryWithObject:applicationID forKey:SKStoreProductParameterITunesItemIdentifier];
SKStoreProductViewController *viewCont = [[SKStoreProductViewController alloc] init];
viewCont.delegate = self;
[viewCont loadProductWithParameters:dict completionBlock:^(BOOL result, NSError *error)
{
UIViewController* viewController = [UIApplication sharedApplication].keyWindow.rootViewController;
if (viewController)
{ [viewController presentViewController:viewCont animated:YES completion:nil]; }
}];
}
Delegate Function
- (void)productViewControllerDidFinish:(SKStoreProductViewController *)viewController
{
if (viewController)
{ [viewController dismissViewControllerAnimated:YES completion:nil]; }
}
The problem is that you must implement
- (void)productViewControllerDidFinish:(SKStoreProductViewController *)viewController
{
if (viewController)
{ [self dismissViewControllerAnimated:YES completion:nil]; }
}
inside the delegate class. If you implement it inside the class whose delegate is presenting the SKStoreProductViewController, it will not work because SKStoreProductViewController will try to call productViewControllerDidFinish: within it's delegate, which isn't implementing that method.
Let me show an example:
#implementation MainViewController
- (void)presentSecondViewController
{
SecondViewController *secondViewController = [[SecondViewController alloc] initWithNibName:#"SecondViewController" bundle:nil];
[secondViewController setDelegate:self];
[self presentViewController:secondViewController animated:YES completion:nil];
}
- (void)productViewControllerDidFinish:(SKStoreProductViewController *)viewController
{
if (viewController)
{ [self dismissViewControllerAnimated:YES completion:nil]; }
}
#end
#implementation SecondViewController {
id delegate <SKStoreProductViewControllerDelegate>;
}
- (void)setDelegate:(id)delegate
{
_delegate = delegate;
}
- (void)callStoreProductViewController
{
SKStoreProductViewController *viewCont = [[SKStoreProductViewController alloc] init];
viewCont.delegate = _delegate;
[viewCont loadProductWithParameters:dict completionBlock:^(BOOL result, NSError *error)
{
UIViewController* viewController = [UIApplication sharedApplication].keyWindow.rootViewController;
if (viewController)
{ [_delegate presentViewController:viewCont animated:YES completion:nil]; }
}];
}
#end
So, if I did understand your problem well, you must implement productViewControllerDidFinish: inside your viewController class, as it is the one who is presentig the SKStoreProductViewController.
Hope this helps!
Please try in Delegate function, replace all lines with:
[self dismissViewControllerAnimated:YES completion:nil];
Where does this code reside? You set the delegate to the instance where this code is written, but you are adding the SKStoreProductViewController to the root view.
Have you tried adding the store to self?
[self presentViewController:storeController animated:YES completion:nil];
Thanks for the delegate function. It isn't obvious in the documentation.