I am new to swift development, I am trying to switch between UINavigation controller, I saw a snippet of code that performed this feature in Objective-c,
UINavigationController* webViewNavigator = [[UINavigationController alloc] initWithRootViewController:okraWebView];
AppDelegate *delegate = (AppDelegate *)[[UIApplication sharedApplication] delegate];
ebViewNavigator.modalPresentationStyle = UIModalPresentationFullScreen;
[delegate.window.rootViewController presentViewController:webViewNavigator animated:NO completion:nil];
I am trying to replicate it for swift. how do I achieve this?
You can try
let webViewNavigator = UINavigationController(rootViewController: okraWebView)
let delegate = UIApplication.shared.delegate as? AppDelegate
ebViewNavigator.modalPresentationStyle = .fullScreen
delegate?.window.rootViewController?.present(webViewNavigator, animated: false)
Related
I have an Objective-C app where I need to load another VC class from within the code. I've managed to accomplish this in another Swift app.
let storyboard = UIStoryboard(name: "Main", bundle: nil)
let controller = storyboard.instantiateViewController(withIdentifier: "OverrideClass")
self.present(controller, animated: true, completion: nil)
I need help creating an identical function for ObjC. It's basically loading the class of the VC with the storyboard identifier mentioned in the code.
The code is very similar just with a different syntax...
UIStoryboard *storyboard = [UIStoryboard storyboardWithName:#"Main" bundle:NULL];
UIViewController *controller = [storyboard instantiateViewControllerWithIdentifier:#"OverrideClass"];
[self presentViewController:controller animated:YES completion:NULL];
Here's the code you provided re-written in Objective-C:
UIStoryboard * storyboard = [UIStoryboard storyboardWithName:#"Main" bundle:NULL];
UIViewController * controller = [storyboard instantiateViewControllerWithIdentifier:#"OverrideClass"];
[self presentViewController:controller animated:YES completion:NULL];
I am using SWRevealViewcontroller by using this sample:
I want to add loginviewcontroller before SWRevealViewcontroller.
What I've tried:
Added loginviewcontroller in Storyboard. Set it as InitialViewcontroller.
Inside button action.
UIStoryboard *storyboard = [UIStoryboard storyboardWithName:#"MainStoryboard" bundle:nil];
MapViewController *rootViewController = [storyboard instantiateViewControllerWithIdentifier:#"MapViewController"];
UINavigationController *navController = [[UINavigationController alloc] initWithRootViewController:rootViewController];
[navController setViewControllers: #[rootViewController] animated: YES];
[self.revealViewController setFrontViewController:navController];
[self.revealViewController setFrontViewPosition: FrontViewPositionLeft animated: YES];
But it is not working. Please help
viewController1
viewController2 *viewController2=[self.storyboard instantiateViewControllerWithIdentifier:#"viewController2Id"];
[self.navigationController pushViewController: viewController2 animated:YES];
viewController2
-(void)pushAfterLoginScreen
{
SidebarViewController *sidebarmemu =(SidebarViewController*) [self.storyboard instantiateViewControllerWithIdentifier:#"SidebarController"];
viewController3* viewController3 = (viewController2*)[self.storyboard instantiateViewControllerWithIdentifier:#"viewController2Id"];
SWRevealViewController *revealController;
UINavigationController *frontNavigationController;
UINavigationController *rearNavigationController;
frontNavigationController =[[UINavigationController alloc]initWithRootViewController: viewController2];
rearNavigationController =[[UINavigationController alloc]initWithRootViewController:sidebarmemu];
revealController = [[SWRevealViewController alloc] initWithRearViewController:rearNavigationController frontViewController:frontNavigationController];
revealController.delegate = self;
self.swcontroller =revealController;
AppDelegate *app =(AppDelegate *)[[UIApplication sharedApplication]delegate];
app.window.rootViewController =self.swcontroller;
}
SWRevealViewcontroller which is already embed with the navigationController you need to pass control to SWRevealViewcontroller after successful login using presentViewController method by setting up the storyboard id to navigationController of SWRevealViewcontroller and navigate your app using below code:
UIStoryboard *mainStoryboard = [UIStoryboard storyboardWithName:#"Main" bundle:nil];
UIViewController *vc = [mainStoryboard instantiateViewControllerWithIdentifier:#"navContStoryboardID"];
[vc setModalPresentationStyle:UIModalPresentationCustom]; // optional
[vc setModalTransitionStyle:UIModalTransitionStyleCrossDissolve]; // optional
[self presentViewController:vc animated:YES completion:nil];
Hope this helps you.
is it possible to access a ViewController's methods from the appDelegate, like it is possible inverse with the following code:?
AppDelegate *ad = (AppDelegate *) [[UIApplication sharedApplication] delegate];
When I try
ViewController *vc = (ViewController *) [[UIApplication sharedApplication] delegate];
I get an error...
Thanks!
In your AppDelegate, assuming viewController is your rootViewController, you can get a list of all view controllers on the stack by with:
NSLog(#"List of current active view controllers:%#", self.viewController.navController.viewControllers);
To access a specific view controller in the viewControllers:
[[self.viewController.navController.viewControllers objectAtIndex:i] someMethodOfThatViewController];
ViewController *vc = (ViewController *)[UIApplication sharedApplication].keyWindow.rootViewController;
or if your delegate have properties
YourAppDelegate *ad = (YourAppDelegate*)[UIApplication sharedApplication].delegate;
ViewController *vc = ad.yourViewControllerProperty;
Did you notice that UINavigationBar is not set anymore when creating a UITableView, even after giving it a title or a button?
Now i'm going mad on how to put a navigation bar over my UITableView. It seems really impossible. I tried to add to my tableView a subview with the Navigation Bar, but seems worthless, because when I scroll down, the navigation bar scrolls down as wellm and it shouldn't.
Any ideas on how to implement it?
EDIT
Well, as always I went on File -> New -> File.. -> UITableView. Then i set a bit of code and when I wrote
self.navigationItem.title = #"MyTitle";
self.navigationController.navigationBar.barStyle = UIBarStyleBlackOpaque;
and tried to test on Simulator, no Navigation Bar appeared.
My init code:
- (id)initWithNibName:(NSString *)nibNameOrNil bundle:(NSBundle *)nibBundleOrNil
{
self = [super initWithNibName:nibNameOrNil bundle:nibBundleOrNil];
if (self) {
self.title = #"TabTitle";
self.tabBarItem.image = [UIImage imageNamed:#"img.png"];
self.view.backgroundColor = [UIColor scrollViewTexturedBackgroundColor];
}
return self;
}
I can't explain why it doesn't appear anymore. I also tried to create a new project and import my classes from a project where the navigation bar appeared, but same result there too.
EDIT2*
The app is a tabBased application.
Here is the code took from the App delegate used to set up the tabBar.
UIViewController *viewController1, *viewController4;
UITableViewController *viewController2, *viewController3;
if ([[UIDevice currentDevice] userInterfaceIdiom] == UIUserInterfaceIdiomPhone) {
viewController1 = [[FirstViewController alloc] initWithNibName:#"First_iPhone" bundle:nil];
viewController2 = [[Tips alloc] initWithNibName:#"Table" bundle:nil];
viewController3 = [[Favorites alloc] initWithNibName:#"Test_iPhone" bundle:nil];
viewController4 = [[SecondViewController alloc] initWithNibName:#"Second_iPhone" bundle:nil];
}
You are initing an UITabBarController and set 4 UIViewControllers as the corresponding UITabbarViewControllers. Since two of them are normal UIViewControntroller and two are UITableViewController there can not be a navigation bar. You have to load the viewController where you'd like the navbar form a UINavigationController. The correct way would be (assuming vc3 is the one where you'd like the navbar):
UIViewController *viewController1, *viewController4;
UITableViewController *viewController2, viewController3;
UINavigationController *vc3NavController;
if ([[UIDevice currentDevice] userInterfaceIdiom] == UIUserInterfaceIdiomPhone) {
viewController1 = [[FirstViewController alloc] initWithNibName:#"First_iPhone" bundle:nil];
viewController2 = [[Tips alloc] initWithNibName:#"Table" bundle:nil];
viewController3 = [[Favorites alloc] initWithNibName:#"Test_iPhone" bundle:nil];
vc3NavController = [[UINavigationController alloc] initWithRootViewController:viewController3];
viewController4 = [[SecondViewController alloc] initWithNibName:#"Second_iPhone" bundle:nil];
}
Then load the vc3NavController instead of viewController3 as the corresponding tab.
So you have: UITabBarController -> UINavigationController -> YourViewController
Maybe Creating a Navigation Interface will help you too.
I want to use pushViewController with UIsegmentedController to push to other view and xib.
Can I do that in xcode 4 ??? If I can , Could you guide me please ?
Here is some code that I try.But won't work.
-(IBAction) segmentedControlIndexChanged:(id)sender
{
if ([sender selectedSegmentIndex] == 0)
{
BDshelveController *shelve_page = [[BDshelveController alloc] initWithNibName: #"BDshelveController" bundle:nil];
}
else if([sender selectedSegmentIndex] == 2)
{
BDlibraryController *lib_page = [[BDlibraryController alloc] initWithNibName:#"BDlibraryController" bundle:nil];
[self.navigationController pushViewController:lib_page animated:YES];
}
}
yes you can, these are the things you could check
you missed segmentedIndex=1 in your code.
you missed to call pushViewController when selected segment=0
Or it is more likely that self.NavigatonController is nil
Your segmented control has not been connected valuechange to your action
If self.navigationController is nil, it depends on how you initialize your app, if your app is navigation bar driven, then this code in your AppDelegate should resolve the issue:
- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {
UINavigationController *navController = [[UINavigationController alloc] initWithRootViewController:yourRootViewController]; // <-- depends if you have storyboards, xib etc...you should this already initialized
[self.window addSubview:navController.view];
[navController release]; // <-- depends if you have ARC
[self.window makeKeyAndVisible];
return YES;
}
Otherwise I suppose you can initialize it where you are, by giving self as root controller.
UINavigationController *navController = [[UINavigationController alloc] initWithRootViewController:self];