i want send data view controller (left) from PopOverController (Right), how can I do it?
You can pass data in prepareForSegue method, but first add identifier for segue.
And use this code:
- (void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender {
if ([segue.identifier isEqualToString:#"showPopover"]) {
NSLog(#"FirstViewController: prepareForSegue");
PopOverController * popoverVC = segue.destinationViewController;
popoverVC.myProperty = #"Data to be passed";
}
}
First make one property which you get data of another viewcontroller .
In you case assume we want String data to first viewController so we make one property in second means PopOverController
#property (nonatomic, strong) NSString *recipeName;
After call prepare for segue method in first viewController in your case ViewController
- (void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender {
if ([segue.identifier isEqualToString:#"IdentifierOfPushViewController"]) {
RecipeDetailViewController *destViewController = segue.destinationViewController;
destViewController.recipeName = #"Hello this passing data"
}
}
Related
This question already has answers here:
Passing data between view controllers
(45 answers)
Closed 6 years ago.
I am trying to pass data from one ViewController to another ViewController.
Firstviewcontroller.m
-(void)NavigateToAnotherScreen:(NSMutableDictionary*)dict{
[self performSegueWithIdentifier:#"NavDashBoardToInfo" sender:self];
}
- (void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender
{
if ([[segue identifier] isEqualToString:#"NavDashBoardToInfo"])
{
InfoViewController *vc = [segue destinationViewController];
[vc setAppointmentDictionary:dict];
}
}
Secondviewcontroller.h
#property (strong, nonatomic) NSMutableDictionary *AppointmentDictionary;
Secondviewcontroller.m
#synthesize AppointmentDictionary;
- (void)viewWillAppear:(BOOL)animated{
NSLog(#"dict===>%#",AppointmentDictionary); // This gives me null
}
Please help me. What i am doing wrong.
I am getting AppointmentDictionary = (null) in viewwillappear.
Though I am doing proper copy of this.
try this
- (void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender
{
if ([segue.destinationViewController respondsToSelector:#selector(setAppointmentDictionary:)]) {
[segue.destinationViewController performSelector:#selector(setAppointmentDictionary:)
withObject:dict];
}
}
Try this one:
-(void)NavigateToAnotherScreen:(NSMutableDictionary*)dict
{
[self performSegueWithIdentifier:#"NavDashBoardToInfo" sender:dict];
}
- (void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender {
InfoViewController *info = segue.destinationViewController;
info.AppointmentDictionary = sender;
}
If you are using performsegue for navigation then you can use below method for transferring data between ViewControllers
- (void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender
{
if ([[segue identifier] isEqualToString:#"NavDashBoardToInfo"])
{
InfoViewController *info = [segue destinationViewController];
info.AppointmentDictionary = "Value you want to pass";
}
}
You are creating InfoViewController instance and not pushing that view controller. You doing a "performSegueWithIdentifier" here new instance will create, so you first instance "info" is not passing here. You can do in other way.
InfoViewController *info = [[InfoViewController alloc] init];
info.AppointmentDictionary = [dict mutableCopy];
[self.navigationController pushViewController: info animated:true];
Option 2:
-(void)NavigateToAnotherScreen:(NSMutableDictionary*)dict{
[self performSegueWithIdentifier:#"NavDashBoardToInfo" sender: [dict mutableCopy]];
}
- (void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender {
if ([segue.identifier isEqualToString:#"NavDashBoardToInfo"]) {
InfoViewController *viewController = (InfoViewController *)segue.destinationViewController;
viewController.AppointmentDictionary = (NSMutableDictionary *)sender;
}
}
In the prepareforsegue method you have to pass the value like mentioned above.
Note: make sure your destination view controller is InfoViewController
If you are using performSegueWithIdentifier then provide the body in function . Don't create any new instance using code and provide segue in storyboard -
- (void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender {
if ([segue.identifier isEqualToString:#"YourController_Segue"]) {
YourController *viewController = (YourController *)segue.destinationViewController;
viewController.AppointmentDictionary = (NSMutableDictionary *)sender;
}
}
I have this code below that send the row to my another class:
[self performSegueWithIdentifier:#"MeInfos" sender:[NSString stringWithFormat:#"%d",(int)indexPath.row]];
-(void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender{
MeInfosViewController *viewController = [[MeInfosViewController alloc] init];
viewController.paramethersToLoad = (NSString*)sender;
NSLog(#"Will receive -> %#",sender);
}
In my another class (MeInfoViewController) I have:
.h
#property (nonatomic, retain) NSString *paramethersToLoad;
.m
#synthesize paramethersToLoad;
-(void)viewDidAppear:(BOOL)animated{
NSLog(#"What comes? -> %#",paramethersToLoad);
}
This code has a little problem, in console I receive the following messages:
Will receive -> 4
What comes? -> (null)
Why this is happening and what the best way to solve it?
The view controller you're creating in prepareForSegue: isn't the instance that the segue will actually load. The view controller that actually gets displayed is created by the iOS runtime, and is passed to you as a property in the segue.
What you want is:
- (void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender {
MeInfosViewController *viewController = (MeInfosViewController *)segue.destinationViewController;
viewController.paramethersToLoad = (NSString *)sender;
}
Your prepareForSegue should look like this :
-(void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender{
if ([[segue identifier] isEqualToString:#"MeInfos"]) {
// Get reference to the destination view controller
MeInfosViewController *viewController = [segue destinationViewController];
viewController.paramethersToLoad = (NSString*)sender;
}
}
Ok this really makes me headache. I have ViewController (using replace) that I assign its delegate property
- (void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender
{
if ([[segue identifier] isEqualToString:#"spoSelectionDemoPlanSegue"])
{
SPOSelectionViewController * vc = [segue destinationViewController];
vc.delegate = self;
NSLog(#"spo segue %#", vc.delegate); //returns current ViewController
}
}
SPOSelectionViewController.h
#property (nonatomic, assign) id<SPOInputDelegate> delegate;
SPOSelectionViewController.m
- (void)viewDidLoad {
[super viewDidLoad];
NSLog(#"delegate didload spo %#", delegate); //returns (null)
}
Somehow it prints null! However there is my other ViewController (using popover) that I try to assign its delegate and it does not null. Anyone can give me suggestion?
As I expected and this is silly, since the storyboard's segue is to a navigationController, so actually the destinationViewController is the navigationController not SPOSelectionViewController.
So I solved it by this way:
UINavigationController* navController = segue.destinationViewController;
SPOSelectionViewController * vc = (SPOSelectionViewController*)navController.topViewController;
vc.delegate = self;
Up until now I have used prepareForSegue method to notify a view controller he is about to review a segue from a different view controller, but if i'm the vc that sending the segue, will my prepareForSegue (in he same class of the segue sender) will check if there is a code to preform before he fires the segue?
I'm asking because I got a solution here to preform a simple segue just to go from stable view row which represent notes to the creation page of the note for editing...very simple, but from some reason it's not presenting my note in the creation page, only takes me to a new clean creation page..
So I though maybe it's because the prepareForSegue method..here you can see the question to give you more details How to to create a segue to push back to editing mode from a table view?
Would really appreciate to get your help on this.
This are the 2 methods I added to my NotesList table view controller:
#pragma mark - delegate
- (void) tableView:(UITableView *)tableView didDeselectRowAtIndexPath:(NSIndexPath *)indexPath
{
[self performSegueWithIdentifier:#"noteSegue" sender:nil];
}
- (void) prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender
{
if ([[segue identifier] isEqualToString:#"noteSegue"]) {
NSIndexPath *indexPath = [self.tableView indexPathForSelectedRow];
NMNote *note = [self.notes objectAtIndex:indexPath.row];
NMCreateNotesViewController *destination = [segue destinationViewController];
destination.textField.text = note.content;
}
}
And I made sure the segue identifier in the storyboard is named noteSegue. So why its note working...Im getting a new TextView instead of populating it with the note content :/
This is the error i'm getting:
Thanks!
The prepareForSegue: method is called on the current VC not the destination. UIViewController Class Reference. You can use the method to obtain a reference to the destination VC and set variables/call methods on it before the segue is performed.
Calling the segue like this:
[self performSegueWithIdentifier:#"NAMEOFSEGUE" sender:nil];
You can then prepare the destination VC like this:
#import "NMCreateNotesViewController.h"
- (void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender
{
if ([[segue identifier] isEqualToString:#"NAMEOFSEGUE"]) {
NMCreateNotesViewController *destination = [segue destinationViewController];
[destination createNote]; /* or something similar */
}
}
EDIT:
- (void) tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath
{
NMNote *note = [self.notes objectAtIndex:indexPath.row];
[self performSegueWithIdentifier:#"noteSegue" sender:note];
}
- (void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender
{
if ([[segue identifier] isEqualToString:#"NAMEOFSEGUE"]) {
NMCreateNotesViewController *destination = [segue destinationViewController];
NMnote *note = (NMNote*) sender;
destination.textField.text = note.content;
}
}
To check if there is a code to preform before the segue you can use solution below:
if ([segue.destinationViewController isKindOfClass:[UIViewController class]]) {
UIViewController *nextVC = segue.destinationViewController;
if(nextVC respondsToSelector:#selector(yourMethod)){
[nextVC yourMethod];
}
}
You can check if you are sure to perform the specific segue by implementing this method
- (BOOL)shouldPerformSegueWithIdentifier:(NSString *)identifier sender:(id)sender
If you have your note presenting code in viewDidLoad, try moving that to viewDidAppear (in your note editing VC). There used to be an issue when presenting from a TableView row where the segue would fire after VDL was executed.
I have a ViewController that has a couple of buttons on it created in Interface Builder. The first button will display a popover linked up in IB, it is linked to a UINavigationController and has a TableView under it with a class of PopupViewController.
The second button, I have an action setup for goToCategory and when clicking on that, I want to set a property on the PopupViewController
ViewController.m
//go to category
-(IBAction)goToCategory:(id)sender{
NSLog(#"GO TO CAT");
//PopupViewController *popupVC = [self.storyboard instantiateViewControllerWithIdentifier:#"popoverVC"];
//popupVC.currentLevel = 1;
[self performSegueWithIdentifier:#"popoverSegue" sender:self];
}
- (void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender{
NSLog(#"seg1");
if ([[segue identifier] isEqualToString:#"popoverSegue"]){
//PopupViewController *popupVC = (PopupViewController *)[[segue destinationViewController] visibleViewController];
//PopupViewController *popupVC = [segue destinationViewController];
PopupViewController *popupVC=[[[segue destinationViewController]viewControllers]objectAtIndex:0];
popupVC.test = #"just a test";
NSLog(#"seg2");
}
}
PopupViewController.h
#property (nonatomic, strong) NSString *test;
PopupViewController.m
#synthesize test;
-(void)viewDidLoad{
NSLog(#"test: %#", test); //returns test: (null)
}
I've found a lot of answers on SO, hence some of the commented out lines in my prepareForSegue. But none of these set the value of test. PopupViewController *popupVC = [segue destinationViewController]; throws an error due to it referring to the UINavigationController so I can't use that as it is, even though that seems to be the way to do it in a lot of answers I've seen. But no matter which way I try doing it, the output is always null?
UPDATE:
PopupViewController *popupVC = (PopupViewController *)[[segue destinationViewController] visibleViewController]; and PopupViewController *popupVC=[[[segue destinationViewController]viewControllers]objectAtIndex:0]; from my prepareForSegue above both work on the 6.1 simulator. My iPad's iOS is 5.1.1 which it isn't working on. Is there something different I need to do for iOS 5?
Try this
- (void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender
{
NSLog(#"seg1");
if ([[segue identifier] isEqualToString:#"popoverSegue"])
{
UINavigationController *navController = (UINavigationController*)[segue destinationViewController];
PopupViewController *popupVC = [navController topViewController];
popupVC.test = #"just a test";
NSLog(#"seg2");
}
}