CurrentViewController.h
#import <UIKit/UIKit.h>
#import "nextNavViewController.h"
#interface CurrentViewController : UIViewController
{
nextNavViewController *contr;
}
- (IBAction)showNavView:(id)sender;
#end
CurrentViewController.m
/*..........*/
- (IBAction)showNavView:(id)sender {
contr = [[nextNavViewController alloc]initWithNibName:#"nextNavViewController"bundle:nil];
[self presentViewController: contr animated:YES completion:nil];
}
/* ......... */
nextNavViewController.h
#import <UIKit/UIKit.h>
#interface nextNavViewController : UINavigationController
#end
I have "nextNavViewController.xib" which contains a table , some buttons and customized navigation bar. I want this interface to be loaded but it loads blank navbar with blank screen.
Is the thing i am doing possible? What i have to do to load the customized interface??
A couple of things:
1) Careful with the name of your classes. Make sure they follow the objective-c standards
2) You don't need to sub-class a UINavigationController. If you want to receive some of the capabilities of a UINavigationController, just:
contr = [[nextNavViewController alloc]initWithNibName:#"nextNavViewController"bundle:nil];
UINavigationController *myNavigation = [[UINavigationController alloc] initWithRootViewController:contr];
[self presentViewController:myNavigation animated:YES completion:nil];
Related
My first view in the viewDidLoad has the following code
UIStoryboard *sb = [UIStoryboard storyboardWithName:#"Dialpad" bundle:nil];
self.vc = [sb instantiateViewControllerWithIdentifier:#"DialpadBoard"];
self.vc.delegate = self;
The header file contains the definition of the view controller
#property (nonatomic, retain) DialpadTableViewController *vc;
after catching an event the view loads a new modal view
- (void)handleEvent:(UIGestureRecognizer*)recognizer {
[self presentViewController:self.vc animated:YES completion:NULL];
}
The view also contains the method to dismiss the modal view:
- (void) dialpadControllerDidCancel:(SearchDialpadTableViewController *)controller {
[self dismissViewControllerAnimated:YES completion:nil];
}
The last method never gets called.
The problem is that the modal view when it is loaded has nil self.delegate. The new modal view is loaded from the storyboard as seen below. Why the delegate is nil? I cannot how a segue since the view is in another storyboard.
you can try this
UIStoryboard *sb = [UIStoryboard storyboardWithName:#"Dialpad" bundle:nil];
UINavigationController *nav= [sb instantiateViewControllerWithIdentifier:#"DialpadBoard"];
((SearchDialpadTableViewController *)[nav viewControllers][0]).delegate = self;
[self presentViewController:nav animated:YES completion:NULL];
Since we have the nav let's take the first controller and assign the delegate
the trick ;)
((SearchDialpadTableViewController *)[nav viewControllers][0]).delegate = self;
Does SearchDialpadTableViewController define a delegate protocol and does it have a property that is specific to that protocol?
The header for that file should look something like:
#protocol ViewControllerDelegateProtocol <NSObject>
- (void)dialpadControllerDidCancel:(SearchDialpadTableViewController *)controller;
#end
#interface ViewController : UIViewController
#property (weak, nonatomic) id<ViewControllerDelegateProtocol> searchPadDelegate;
#end
Then when the user taps Done which is I'm assuming what you're trying to do (send a delegate message when that happens). You would write something like
- (IBAction)donePressed:(id)sender
{
if ([self.searchPadDelegate respondsToSelector:#selector(dialpadControllerDidCancel)]) {
[self.searchPadDelegate dialpadControllerDidCancel:self];
}
}
you must be certain, that self.vc is a class, that you expected. It can be also NavigationController
I have a Controller A and there is a UIButton, which on click I am presenting a new Controller B. But the problem is that the controller B is first embedded with a NAV. So ultimately I am presenting the UINavigationController.
Now there is a UIButton in Controller B on which the controller will dismiss and a delegate should be passed on controller A with some message
Controller A UIButtonCode
- (IBAction)summaryButtonClick:(id)sender {
UIStoryboard* storyBoard=[UIStoryboard storyboardWithName:#"Main" bundle:nil];
UINavigationController* summaryVC=[storyBoard instantiateViewControllerWithIdentifier:#"SummaryNavVC"];
[self presentViewController:summaryVC animated:YES completion:nil];
summaryVC=nil;
}
Now Controller B
.h file
#import <UIKit/UIKit.h>
#protocol SummaryViewWhatsNewDelegate <NSObject>
#required
- (void) SummaryViewWhatsNew:(NSString*)title;
#end
#interface SummaryViewController :
UIViewController<UITableViewDataSource,UITableViewDelegate>
{
id <SummaryViewWhatsNewDelegate> _delegate;
}
#property (nonatomic,strong) id delegate;
#property (weak, nonatomic) IBOutlet UITableView *summaryTableView;
- (IBAction)closeSummaryView:(id)sender;
#end
.m
//Button Click
[self dismissViewControllerAnimated:YES completion:^{
[_delegate SummaryViewWhatsNew:#"Sales Triggers Filter"];
}];
I have already made the implementation of delegate in my Controller A
.h
#interface ControllerA : UIViewController<SummaryViewWhatsNewDelegate>
.m of Controller A
#pragma mark -ControllerB Delegate
-(void)SummaryViewWhatsNew:(NSString *)title{
NSLog(#"Delegate Called");
}
In this case I know I haven't provided the delegate.self part as I am presenting the NAV controller and not the Controller B
So I made a Object in viewDidLoad and Controller *B and set the delegate to self. But it doesn't work and delegate is never called
On the other hand if I only present the Cntroller B without Navigation and just before presenting I keep the b.delegate=self, it works.
Another alternate can be firing Notifications. But I want to work with delegates.
So is there any way to call the delegate of the presented view controller which is embedded by Nav. Any help will be highly appreciated.
Well I got the answer
We have to fetch the Controller object from NAV
Where I a presenting I just need to add these lines and it worked
UIStoryboard* storyBoard=[UIStoryboard storyboardWithName:#"Main" bundle:nil];
UINavigationController* summaryVC=[storyBoard instantiateViewControllerWithIdentifier:#"SummaryNavVC"];
//Add These lines in order to get the object of Controller B.
// SummaryViewController is my Controller B
SummaryViewController* summary=[[summaryVC viewControllers] objectAtIndex:0];
summary.delegate=self;
[self presentViewController:summaryVC animated:YES completion:nil];
And it worked.
What I did:
I am using scrollview to view some UIView(s), with paging enabled.
In last page in subview of scrollView I added a button.
I also wrote a function which is in subclass of UIView ,which is invoked when we press that button.
I want to view storyboard when I press that button.
You need to implement protocol method for custom UIView class.
For example;
#import <UIKit/UIKit.h>
#protocol YourCustomViewDelegate <NSObject>
- (void)buttonTapped;
#end
#interface YourCustomView : UIView
#property (nonatomic, strong) id< YourCustomViewDelegate > delegate;
#end
And the .m file you can call buttonTapped delegate method.
- (void)myCustomClassButtonTapped:(id)sender
{
[self.delegate buttonTapped];
}
For proper work;
set your custom view delegate to self in your custom view controller.
add buttonTapped method to that view controller
And do what you want in that method. Present/Push view controllers like the other answers explained.
Edit
I will try to illustrate very simple usage of protocols, hope it will help you.
#import "MyViewController.h"
#import "YourCustomView.h"
#interface MyViewController ()<YourCustomViewDelegate> // this part is important
#end
#implementation MyViewController
- (void)viewDidLoad {
[super viewDidLoad];
YourCustomView *customView = // initialize your custom view, I suppose that you already did it
customView.delegate = self;
}
- (void)didReceiveMemoryWarning {
[super didReceiveMemoryWarning];
// Dispose of any resources that can be recreated.
}
- (void)buttonTapped
{
YOUR_VIEW_CONTROLLER_CLASS *viewCon =[storyboard instantiateViewControllerWithIdentifier:#"mainVC"]; //mainVC is just a example and u will have to replace it with your viewController storyboard id
//Pushing VC
[self.navigationController pushViewController:viewCon animated:YES];
}
Take a look at this
YourViewController *obj=[[YourViewController alloc]init];
UINavigationController *nav=[[UINavigationController alloc]initWithRootViewController:obj];
[[[UIApplication sharedApplication]keyWindow].rootViewController presentViewController:nav animated:YES completion:NULL];
try like this
UIStoryboard* storyboard = [UIStoryboard storyboardWithName:#"MainStoryboard" bundle:nil];
UIViewController* initialView = [storyboard instantiateInitialViewController];
Firstly you need to set a storyboard Id to your ViewController, namely "mainVC". Then you could pus/present it using below code :-
YOUR_VIEW_CONTROLLER_CLASS *viewCon =[storyboard instantiateViewControllerWithIdentifier:#"mainVC"]; //mainVC is just a example and u will have to replace it with your viewController storyboard id
//Pushing VC
[self.navigationController pushViewController:viewCon animated:YES];
//OR presenting VC
[self presentViewController:viewCon animated:YES completion:nil];
Also in case if you want your another storyboard to be initiated then below,
UIStoryboard* storyboard = [UIStoryboard storyboardWithName:#"MainStoryboard" bundle:nil]; //Change MainStoryboard with your storyboard id
hope this will help
the way i perceive your question is
->Rightnow your inside you are in UIView class and inside it there is a button by clicking it you want to push or present a ViewController and offcourse from inside your UIView class you cant push or present your view Controller. So
you can do one simple thing first inside action method make a ref(forward declaration) or you can make a whole new object of your ViewController class in which your UIView is present right now , then call a function(which exist in your ViewController) like
//function inside your uiview calss
- (void)btnaction
{
[_objCSInformationViewController pushViewController];
}
// function inside your view controller
-(void)pushViewController
{
yourViewController *objViewController = [[yourViewController alloc]initWithNibName:#"yourViewController" bundle:nil];
[strong.navigationController pushViewController:objViewController animated:YES];
}
I need popover view. i followed this instructions.
Init: Create two UIViewController in storyboard.
lets say FirstViewController which is normal and SecondViewController Which we make Popup.
Model Segue: Put UIButton In FirstViewController and create a segue on this UIButton to SecondViewController as model segue.
Make Transparent: Now selet UIView (UIView Which is created by default with UIViewController) of SecondViewController and change its background color to clear color.
Make background Dim: Add a UIImageView in SecondViewController which cover hole screen and sets its image to some dimmed semi transparent image. You can get a sample from here : UIAlertView Background Image
Display Design: Now Add a UIView and make and kind of design you want to show. Here I have shown screen shot of my storyboard.
Here I have add segue on login button which open SecondViewController as popup to ask username and password
Important: Now that main step. We want that SecondViewController dont hide FirstViewController completely. We have set clear color but this is not enough. By default it add black behind model presentation So we have to add one line of code in viewDidLoad of FirstViewController. You can add it at other place also but it should run before segue.
[self setModalPresentationStyle:UIModalPresentationCurrentContext];
Dismiss: When to dismiss is depend on you. This is a model presentation so to dismiss we do what we do for model presentation:
[self dismissViewControllerAnimated:YES completion:Nil];
But am USING NAVIGATION CONTROLLER,, for that transparent background is not coming?????
Kindly help me..!!!! My screen shot is below.
create one view controller in freeform mode just like following image
in your first view controller add the one UIButton just like the following image
in your first view controller.h add the following line
#import "UIPopoverController+iPhone.h"
#interface first view controller : UIViewController<UIPopoverControllerDelegate>
#property (nonatomic,strong) UIPopoverController *popOver;
#property (strong, nonatomic) IBOutlet UIButton *popbtn;
in your first view controller.m add the following line to the button action method
- (IBAction)popButton:(UIButton *)sender
{
UILabel *showlblView=[[UILabel alloc]init];
showlblView.frame=CGRectMake(10, 10, 250, 40);
showlblView.text=#"Gopi";
showlblView.textColor=[UIColor whiteColor];
showlblView.textAlignment=NSTextAlignmentCenter;
final *vc=[[final alloc] init];
[vc.view addSubview:showlblView];
self.popOver=[[UIPopoverController alloc]initWithContentViewController:vc];
[self.popOver setPopoverContentSize:CGSizeMake(300, 200)];
CGRect popoverframe=CGRectMake(self.popbtn.frame.origin.x, self.popbtn.frame.origin.y, self.popbtn.frame.size.width, self.popbtn.frame.size.height);
[self.popOver presentPopoverFromRect:popoverframe inView:self.view permittedArrowDirections:UIPopoverArrowDirectionUp animated:YES];
}
here ur NSObjet class file UIPopoverController+iPhone.h
.h file
#import <UIKit/UIKit.h>
#interface UIPopoverController (iPhone)
+ (BOOL)_popoversDisabled;
#end
.m file
#import "UIPopoverController+iPhone.h"
#implementation UIPopoverController (iPhone)
+ (BOOL)_popoversDisabled {
return NO;
}
#end
the full project code is available at the following link :
https://www.sendspace.com/file/ktie4t
i had the same problem and didn't find solution how to solve it with segue on storyboard, but programmatically it's work fine, when i presenting second controller on first controller (that pushed with navigationViewController). if it's not critical for you, try this:
+ (void)showWithParent:(UIViewController *)parentController {
static SomeViewController *singleton = nil;
static dispatch_once_t onceToken;
dispatch_once(&onceToken, ^{
UIStoryboard *storyboard = [UIStoryboard storyboardWithName:#"Main" bundle:nil];
singleton = [storyboard instantiateViewControllerWithIdentifier:#"SomeViewControllerID"];
});
[parentController presentViewController:singleton animated:YES completion:nil];
}
or just:
UIStoryboard *storyboard = [UIStoryboard storyboardWithName:#"Main" bundle:nil];
SecondViewController *secondController = [storyboard instantiateViewControllerWithIdentifier:#"SecondViewControllerID"];
[firstController presentViewController:secondController animated:YES completion:nil];
I have a UINavigationController and I'm trying to release from memory every UIViewController once another one is on top of the stack. I assign the viewControllers property of the UINavigationController to the new UIViewController and then pop into it. This way I always have just one UIViewController in stack. However, the memory keeps adding up every time I create a new UIViewController. Dealloc is called, but the memory usage remains the same.
You can download the example project HERE
FirstViewController.h
#import "SecondViewController.h"
#interface FirstViewController : UIViewController
-(IBAction)goToSecond:(id)sender;
#end
FirstViewController.m
#import "FirstViewController.h"
#interface FirstViewController ()
#end
#implementation FirstViewController
- (void)viewDidLoad
{
[super viewDidLoad];
NSLog(#"%#", self.navigationController.viewControllers);
}
-(void)goToSecond:(id)sender{
SecondViewController *secondVC = [[SecondViewController alloc]init];
[self.navigationController setViewControllers:#[secondVC]];
[self.navigationController popViewControllerAnimated:NO];
}
-(void)dealloc{
NSLog(#"FirstVC dealloc");
}
#end
SecondViewController.h
#import "FirstViewController.h"
#interface SecondViewController : UIViewController
-(IBAction)goToFirst:(id)sender;
#end
SecondViewController.m
#import "SecondViewController.h"
#interface SecondViewController ()
#end
#implementation SecondViewController
- (void)viewDidLoad
{
[super viewDidLoad];
NSLog(#"%#", self.navigationController.viewControllers);
}
-(void)goToFirst:(id)sender{
FirstViewController *firstVC = [[FirstViewController alloc]init];
[self.navigationController setViewControllers:#[firstVC]];
[self.navigationController popViewControllerAnimated:NO];
}
-(void)dealloc{
NSLog(#"SecondVC dealloc");
}
#end
Navigation controller should not be used as you intended.
You should call pushViewController and popViewController for present/dismiss your viewControllers.
If you have memory issues, try to release memory in didReceiveMemoryWarning callback
I'm not sure about the benefit of a uinavigationcontroller but anyway you could add this snippet on your .m of your uiviewcontrollers
-(void)viewDidAppear:(BOOL)animated{
[super viewDidAppear:animated];
if (self.navigationController.viewControllers.count > 1) {
NSMutableArray *newViewControllers = [NSMutableArray arrayWithArray:self.navigationController.viewControllers];
[newViewControllers removeObject:[controllers objectAtIndex:1]];
self.navigationController.viewControllers = newViewControllers;
}
}
And instead of
[self.navigationController setViewControllers:#[firstVC]];
[self.navigationController popViewControllerAnimated:NO];
you can set
[self.navigationController pushViewController:[[FirstViewController alloc] init] animated:NO];
You are using pop to go further, but you need to use push if you want to go to the next ViewController.
-(void)goToSecond:(id)sender{
SecondViewController *secondVC = [[SecondViewController alloc]init];
[ self.navigationController pushViewController:secondVC animated:YES];
}
And in the SecondViewController to go back to your FirstViewController you should use pop
-(void)backToController
{
[self.navigationController popViewControllerAnimated:YES];
}
In your case
-(void)goToFirst:(id)sender
{
[self.navigationController popViewControllerAnimated:YES];
}
I uploaded a simple app to GitHub, with the fake navigation bar that i was talking about in my comment, hope it helps for your needs: https://github.com/yosihashamen/HelpersApps
Be ware that you must keep on "BaseViewController" alive at all times.
What I mean is something like this.
In your FirstViewController use presentViewController instead of push adding a new UINavigationController to the SecondViewController
-(void)goToSecond:(id)sender{
SecondViewController *secondVC = [[SecondViewController alloc]init];
UINavigationController *nav = [[UINavigationController alloc] initWithRootViewController:secondVC];
[self presentViewController:nav animated:YES completion:NIL];
}
In the SecondViewController add an UIBarButtonItem to the Navigation bar
UIBarButtonItem *backButton = [[UIBarButtonItem alloc] initWithTitle:#"Back" style:UIBarButtonItemStyleDone target:nil action:#selector(goToFirst:)];
self.navigationItem.backBarButtonItem = backButton;
And implement dismiss method.
-(void)goToFirst:(id)sender
{
[self dismissViewControllerAnimated:YES completion:NULL];
}
Try out setViewControllers:animated:
This allows you to explicitly set the view controllers on the UINavigationController stack, like you are doing, and it will automatically handle the navigation animation without you having to call popViewControllerAnimated:
This is useful if you have a multi-view journey where you need to get rid of the screens that have been shown so far but maintain the navigation animation (eg. app demo on launch) or if you want to easily push multiple view controllers on the navigation stack at once.
Apple doc here: https://developer.apple.com/library/ios/documentation/uikit/reference/UINavigationController_Class/Reference/Reference.html#jumpTo_21