I have a problem in memory management, when navigate to specific UIViewController
Example:
I have 3 UIViewController and use Storyboard modal segue and I stay in the first and I need go to the number 3 directly
I use this code works fine, but when i need return to the 1 and I if repeat this code. I receive a memory warning and crash later.
This is my code:
go to view 3 ->
UIStoryboard *storybord = [UIStoryboard storyboardWithName:#"Main" bundle:nil];
UIViewController * viewTree = [storybord instantiateViewControllerWithIdentifier:#"Three"];
[self presentViewController:viewTree animated:YES completion:nil];
go to view 1 ->
UIStoryboard *storybord = [UIStoryboard storyboardWithName:#"Main" bundle:nil];
UIViewController * viewOne = [storybord instantiateViewControllerWithIdentifier:#"One"];
[self presentViewController:viewOne animated:YES completion:nil];
You must be constantly be presenting each view controller over each other, which is raising the memory warning issue. To present ViewControllerThree use the following code in ViewControllerOne
#implementation ViewControllerOne
- (IBAction) goto3 {
UIStoryboard *storybord = [UIStoryboard storyboardWithName:#"Main" bundle:nil];
UIViewController * viewTree = [storybord instantiateViewControllerWithIdentifier:#"Three"];
// Brings you to the third view controller.
[self presentViewController:viewTree animated:YES completion:nil];
}
#end
And then to go back to ViewControllerOne implement this code in ViewControllerThree
#implementation ViewControllerThree
-(IBAction) backTo1 {
// Dismisses the third view and brings you back to the first view controller.
[self dismissViewControllerAnimated:YES completion:nil];
}
Related
I have created storyboard which I want to open on top of another view or in childView so that when I close or destroy this view of storyboard the earlier view on which the storyboard is opened remains the same.
When I run the following code:-
UIStoryboard *storyboard = [UIStoryboard storyboardWithName:#"Main_iPad" bundle:nil];
ViewController *detailViewController = [storyboard instantiateViewControllerWithIdentifier:#"neolick"];
[[UIApplication sharedApplication].keyWindow setRootViewController:detailViewController];
First, the storyboard opens but I don't know whether it opens on top of previous view or it destroys the previous view & then open.
Second, the functions needed on that storyboard runs automatically which is as I want but how these things are working.
If anyone can help me understand the above code and its working.
NOTE: I cannot call the earlier view again in same state because of some reason.
Thanks in Advance!!
Here you are setting root view controller
it will not keep your back screen as it is what you want
If you want to keep current screen and show other screen on that
you have two approaches
1) Present ViewController
2) Push View Controller
1) Present ViewController
for this you can present your screen on top of other screen which is visible
for example
- (IBAction)btnNextTapped:(id)sender {
UIStoryboard *storyboard = [UIStoryboard storyboardWithName:#"Main_iPad" bundle:nil];
ViewController *detailViewController = [storyboard instantiateViewControllerWithIdentifier:#"neolick"];
[self presentViewController:detailViewController animated:true completion:nil]
}
2) Push View Controller
For that you need NavigationController and need to push your ViewController from current visible screen
i.e
[self.navigationController pushViewController:vc animated:true];
EDIT
as per discussion you need to find current top view controller then you should present it
Add this method below your method
- (UIViewController*) topMostController
{
UIViewController *topController = [UIApplication sharedApplication].keyWindow.rootViewController;
while (topController.presentedViewController) {
topController = topController.presentedViewController;
}
return topController;
}
And Replace this method with code
- (void)goToNewPage:(CDVInvokedUrlCommand*)command
{
UIStoryboard *storyboard = [UIStoryboard storyboardWithName:#"Main_iPad" bundle:nil];
ViewController *detailViewController = [storyboard instantiateViewControllerWithIdentifier:#"neolick"];
[[self topMostController] presentViewController:detailViewController animated:true completion:nil];
}
I have the following viewControllers:
When I click the "Go to gray" it loads the gray viewController using SWRevealViewController.
Here is my code:
#import "SWRevealViewController.h"
#interface ViewController ()
#end
#implementation ViewController
- (IBAction)gotoGray:(id)sender
{
UIStoryboard *storyboard = [UIStoryboard storyboardWithName:#"Main" bundle:nil];
SWRevealViewController *swrController = [storyboard instantiateViewControllerWithIdentifier:#"SWRevealViewController"];
[self presentViewController:swrController animated:YES completion:nil];
}
My Question to you guys is how can pass data from the blue view controller to the gray (front SWRevealViewController) ?
I'll really appreciate your help.
You have a reference to it with SWRevealViewController *swrController, you can set data on the reference by using information from the presenting view controller.
- (IBAction)gotoGray:(id)sender
{
UIStoryboard *storyboard = [UIStoryboard storyboardWithName:#"Main" bundle:nil];
SWRevealViewController *swrController = [storyboard instantiateViewControllerWithIdentifier:#"SWRevealViewController"];
swrController.aProperty = self.myInformation;
swrContoller.anArray = self.arrayOfInfo
[self presentViewController:swrController animated:YES completion:nil];
}
I added one ViewController to my project and created one class.
After I bind this class to my ViewController.
In another controller I have method:
- (IBAction)login:(id)sender {
// How here I can do redirect to controllerViewController
}
There are two ways to push view controllers in the application.
1) by Segue
2) By View controller identifier
1) By Segue :
[self performSegueWithIdentifier:"SegueIdentifier" sender:self];
2) By View controller identifier :
Yourclassname *gotoYourClass = [self.storyboard instantiateViewControllerWithIdentifier:#"ViewControllerIdentifier"];
[self.navigationController pushViewController:gotoYourClass animated:YES];
- (IBAction)login:(id)sender {
ViewController *vc = [[ViewController alloc]initWithNibName:#"ViewController" bundle:nil];
[self presentViewController:vc animated:YES completion:nil]; }
In the storyboard give your view controller an identifier (under the Attributes Inspector) then use the following code, to bring that view forward.
IF YOU WANT TO USE PUSH THEN USE THIS CODE
UIStoryboard *mainStoryboard = [UIStoryboard storyboardWithName:#"STORYBOARDNAME" bundle:nil];
UIViewController *vc = [mainStoryboard instantiateViewControllerWithIdentifier:#"VIEWCONTROLLERIDENTIFIER"];
[self.navigationController pushViewController:vc animeted:YES];
IF YOU WANT TO PRESENT THEN USE THIS CODE
UIStoryboard *mainStoryboard = [UIStoryboard storyboardWithName:#"STORYBOARDNAME" bundle:nil];
UIViewController *vc = [mainStoryboard instantiateViewControllerWithIdentifier:#"VIEWCONTROLLERIDENTIFIER"];
[self presentModalViewController:vc animated:YES];
Note: In UIViewController please enter your view controller name which you want to push into another view.
If you want to comeback to the current ViewController later then use Navigation ViewController or else just use the presentedViewController of self(your current viewController)- no going back business, like they have previously illustrated.
For a simple block of execution(demo or practice) it's all the same but for a project application it completely matters to make the correct choice.
I used code from this question Display UIViewController as Popup in iPhone it is working fine but I don't want to use segue or I can say I can't use segue because all the code is created programmatically, so I cant set segue on button.
I used this code but it didn't work
- (IBAction)open:(id)sender {
UIStoryboard *storyboard = [UIStoryboard storyboardWithName:#"Main" bundle:nil];
UIViewController *newVC = (UIViewController *)[storyboard instantiateViewControllerWithIdentifier:#"Second"];
[ViewController setPresentationStyleForSelfController:self presentingController:newVC];
[self.navigationController pushViewController:newVC animated:YES];
}
Edit 1:
View after popup
You should check if this VC self.navigationController is not nil. and i think you want to presentViewController: not pushViewController:...
I have three View controller A,B,C.I have navigation controller attached to A view controller.In A i have some buttons,I have attached the button segue to B view controller.Onclick of the button i go to the B view controller.On B View controller i have UITableView on click of table view item i am launching the C view controller.below is the code for that
- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath
{
if(indexPath.row==0)
{
NSLog(#"first cell");
UIStoryboard *storyboard = [UIStoryboard storyboardWithName:#"Main" bundle: nil];
UIViewController * vc = [storyboard instantiateViewControllerWithIdentifier:#"BusinessCard"];
[self presentViewController:vc animated:YES completion:nil];
}
else if(indexPath.row==1)
{
NSLog(#"second cell");
}
else if(indexPath.row==2)
{
NSLog(#"third cell");
}
}
But on C view controller the navigation Bar is not appearing.I think C view controller is not linked to the Navigation Controller.
You use navigationController push method to display navigation bar in C viewController
try this code:
UIStoryboard *storyboard = [UIStoryboard storyboardWithName:#"Main" bundle: nil];
UIViewController * vc = [storyboard instantiateViewControllerWithIdentifier:#"BusinessCard"];
[self.navigationController pushViewController:vc animated:YES];
Use the code below
UIStoryboard *storyboard = [UIStoryboard storyboardWithName:#"Main" bundle: nil];
UIViewController * vc = [storyboard instantiateViewControllerWithIdentifier:#"BusinessCard"];
UINavigationController *nav=[[UINavigationController alloc] initWithRootViewController:vc];
[self presentViewController:nav animated:YES completion:nil];
You need to present it using UINavigationController as modal.
Hope it helps.
use this:
[self.navigationController pushViewController:vc animated:YES];
You can use "Push" segue and embed your ViewController in Navigation Controller, and then use its Navigation Controller's functions like pushViewController and popViewControllerAnimated
Answer are all correct, but i just want to explain things..
//This line gets the storyboard with the name "Main" which contains all
//the setup you made for UI (User interface)
UIStoryboard *storyboard = [UIStoryboard storyboardWithName:#"Main" bundle: nil];
//While this like gets the view inside your storyboard with
//storyboard ID/indentifier `BusinessCard `
UIViewController * vc = [storyboard instantiateViewControllerWithIdentifier:#"BusinessCard"];
//Lastly, this line is correct presenting the viewcontroller BUT this doesn't add your
//viewcontroller to the array of viewControllers inside navigationController
//
//Also, this line makes you present the viewController above the
//rootViewController of window which is in your case the navigationController
//
This is you Error
[self presentViewController:vc animated:YES completion:nil];
//This is what you are looking for, and the correct one for your implementation
//
//This will let you add the `vc`(viewController) to the array of viewController
//in navigationController, to confirm that you can check the `self.navigationController.viewControllers`
//which will return the array of viewController inside your navigationController
This is the Answer
[self.navigationController pushViewController:vc animated:YES];
Hope this helps you, and my explanation is apprehendable.. Cheers