I have two ViewControllers conected by a segue, the first is Sub View and the second is Sub Tabela
I want to pass a value from the selected row in that table from my first view controller to my second view controller, so i can define his title.
Here is the code.
SubView.m (My first ViewController)
- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath
{
// _vinhoArray is the array that I populate the TableView
NSString *selectedRow = [_vinhoArray objectAtIndex:indexPath.row];
// Sub Tabela is the name of Second View
SubTabela *subTabela = [[SubTabela alloc] init];
// tituloTabela is a NSString in my Second View
subTabela.tituloTabela = linhaSelecionada;
// Here i get the Right value
NSLog(#"value %#", subTabela.tituloTabela);
}
SubTabela.h (My second ViewController)
#property (nonatomic, strong) NSString *tituloTabela;
SubTabela.m
#synthesize tituloTabela;
- (void)viewDidLoad
{
[super viewDidLoad];
self.title = tituloTabela;
// Here i get the a Null value
NSLog(#"value %#", tituloTabela);
}
Please Help!
I don't think your passing your data in correctly, it looks as though you are creating an object inside your didSelectRowAtIndexPath and passing the data into that, then discarding this object. What you need to do is call this:
[self performSegueWithIdentifier:<#(NSString *)#> sender:self];
to change the screen and then pass the data like this is the prepareForSegue callback
- (void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender
{
SubTabela *vc = (SubTabela *)segue.destinationViewController;
vc.tituloTabela = linhaSelecionada;
}
Related
I am trying to send an NSMutableArray of the chosen cell to another view when a cell is clicked. I have the array of the chosen cell, but I can't get it to pass over.
"SearchResultsModalTableViewController.m"
-(void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath
{
NSMutableArray *aVenue = [self.venues objectAtIndex:indexPath.row];
DetailSearchResultViewController *detailVC =[[DetailSearchResultViewController alloc]init];
detailVC.venueInfo = aVenue;
NSLog(#"%#",aVenue);
}
When you use storyboards, you usually add segues from table cells to a destination storyboard. If that is what you are doing, then the way to deal with the selection is in the prepareForSegue: method of your view controller.
Here is an example. I am assuming that DetailSearchResultViewController in your code is a UINavigationController:
- (void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender {
DetailSearchResultViewController* destinationViewController = (DetailSearchResultViewController*)segue.destinationViewController;
NSIndexPath *p = self.tableView.indexPathForSelectedRow;
NSUInteger idx = p.row;
NSMutableArray *aVenue = [self.venues objectAtIndex:indexPath.row];DetailSearchResultViewController *detailVC =[[DetailSearchResultViewController alloc]init];
destinationViewController.venueInfo = aVenue;
[super prepareForSegue:segue sender:sender];
}
I'm a newbie in IOS,
I've been strugling with passing data from child to parent tableview. I have defined the parent table view as static, four cells are connected to other table views. These tableviews has data i would like when selected to be passed to my static cell accordingly. I read a lot of solutions about passing data, using delegates and segue but none of them seem to be working for me. i.e. a repeat cell in static table view has two labels and the UILabel Repeat, I don't want that to change and repeatDetail this is the one that when a disclosure indicator is triggered and a new tableview is presented with the data to choose to be able when i click back button to have the seleted data in my repeatDetail Label. My static table is embeded in Navigation controller using storyboard. I would like when data is selected in FirstChildViewController to modify selected data i.e. Monday to Mon in RootViewController. However in my code after selecing data in child checkmark is there but as soon
as I move back to RootVC nothing is showing,and when i go back to Child no selction is howing either.
1. Save the selected Data in Child, only change when there is new selection
2. Use short week names when sending to RootVC
3. repeatDetail to have the selected data
Without writting too much let me show what i have done.
in RootViewController.h // RootViewController is static
#import "FirstChildViewController"
#interface RootViewController: UITableViewController <repeatProtocol> //RootViewController COnfirms to the delegate
#property repeat, repeatDetail;
#end
next on my RootViewController.m
#implementaion RootViewController
#sysnthesis repeat,repeatDetail;
- (void) viewDidload
{
repeat.text = #"Repeat"
repeatDetail= //not show how call this label from 1stViewController
}
-(void) selectedValue:(NSString *)string //protocol method
{
FirstChildViewController *RVC =[[FirstChildViewController alloc] init];
RVC.delegate =self;
[self selectedValue:string]; //This part confuses me, i know i have to implement the delegate method but not sure if i implement it correctly.
}
-(void) didReceiveMemoryWarning
{
[super didReceiveMemoryWarning];
}
- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath
{
}
in FirstChildViewController.h
#class FirstChildViewController
#protocol repeatProtocol <NSObject>
#required
-(void) selectedValue:(NSString *)string;
#end
#interface FirstChildViewController: UITableViewController
{
NSArray *tableData;
id <repeatProtocol > repeatDelegate;
NSString *selectedDay;
}
#property (retain) id <repeatProtocol> repeatDelegate;
in FirstChildViewController.m
#synthesize tableData;
#synthesize repeatDelegate;
- (void) viewDidLoad
{
[super viewDidLoad]
tableData= [NSArray alloc] initWithArrays:#"Sunday",#"Monday",#"Tuesday",#"Wednesday",#"Thursday",#"Friday",#"Saturday";
}
- (int)numberOfSectionsInTableView:(UITableView *)tableView
{
return 1;
}
- (int)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section
{
return 7;
}
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:#"RepeatCell"];
if(cell == nil){
cell = [[UITableViewCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:#"RepeatCell"];
}
cell.textLabel.text = [tableData objectAtIndex:indexPath.row]//strings from an array here;
return cell;
}
- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath
{
UITableViewCell *cell = {tableView cellForRowAtIndexPath:indexPath];
cell.accessaryType = UITableViewCellAccessaryCheckMark;
[tableView deselectRowAtIndexPath:indexPath animated:YES];
if([self.delegate respondsToSelector:#selector(selectedValue:)])
{
[self.myDelegate selectedValue:selectedDay];
NSLog(#"string passed");
}
[self dismissViewControllerAnimated:YES completion:nil];
NSLog(#"FirstChildViewController dismissed");
}
#end
It's a little hard to sort out what's happening from your description; so I'll restate what I think the issue is.
You have a UITableView that displays something like settings that you which to modify in a series of distal view controllers. But you're unsure of what mechanism to use when returning that data to the static table view. Basically, you want to capture that data when the distal controller finishes. I won't deal with how you're displaying it in the root view controller, because it's unclear from your code sample.
Nonetheless, I'd favor not using a formal delegate protocol at all. It's just one datum going back - so a protocol seems like a wasted formality. I'd use a completion block.
So your FirstViewController interface could look like
typedef void(^WeekdayCompletionBlock)(NSString *dayName);
#interface FirstViewController : UIViewController
#property (nonatomic, strong) WeekdayCompletionBlock completionBlock;
#end
When you instantiate your FirstViewController, just provide it with a completion block. Since I think you are using Storyboards, you'd do this in prepareForSegue: method of your RootViewController.
- (void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender {
UIViewController *destinationController = segue.destinationViewController;
if( [destinationController isKindOfClass:[FirstViewController class]] ) {
[(FirstViewController *)destinationController setCompletionBlock:^(NSString *returnString){
// do something here with your string
// maybe you must reload your table
// it depends on where your returning data needs to display
}];
}
}
Finally, you need to execute that block when the user passes control back to the RootViewController. For example, is there a Save button or the like? There you would just execute the completion block, e.g. self.completionBlock(myNewDayOfWeekString)
Alternatively, you can create a global NSString in rootVC.h:
NSString *returnString;
Include rootVC.h in firstVC.h if you haven't already done that. This allows returnString to be accessible from firstVC.m:
#import "rootVC.h"
You can assign returnString in firstVC.m:
- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath
{
...
returnString = <selected value>;
}
And show the returnString in rootVC.m below as NSBum pointed out:
-(void) viewDidload
{
repeat.text = #"Repeat";
repeatDetail.text = returnString;
}
I am calling a method in my TableViewController class from another class.
To call the method of displaying the tableview, I do this:
TableViewController *tableVC = [[TableViewController alloc]init];
[tableVC setTableViewContent];
then in TableViewController.h
#interface TableViewController : UITableViewController <UITableViewDelegate, UITableViewDataSource>
{
NSMutableArray *nameArray;
}
-(void)setTableViewContent;
#property (nonatomic, strong) IBOutlet UITableView *tableView;
#end
TableViewController.m
#implementation TableViewController
#synthesize tableView;
- (void)viewDidLoad
{
nameArray = [[NSMutableArray alloc]init];
[super viewDidLoad];
}
-(void)setTableViewContent{
AppDelegate *appDelegate = (AppDelegate *)[[UIApplication sharedApplication] delegate];
for(int i=0;i< [appDelegate.businessArray count];i++)
{
NSDictionary *businessDict = [[appDelegate.businessArray objectAtIndex:i] valueForKey:#"location"];
nameArray = [appDelegate.businessArray valueForKey:#"name"];
}
NSLog(#"%#", nameArray);
NSLog(#"tableview: %#", tableView);
// here tableview returns null
[tableView reloadData];
}
- (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView
{
// Return the number of sections.
return 1;
}
- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section
{
// Return the number of rows in the section.
return [nameArray count];
}
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
NSLog(#"updating tableview...");
static NSString *CellIdentifier = #"Cell";
UITableViewCell *cell =[tableView dequeueReusableCellWithIdentifier:CellIdentifier forIndexPath:indexPath];
// Configure the cell...
cell.textLabel.text = [nameArray objectAtIndex:indexPath.row];
return cell;
}
For some reason when I try to log the tableview, it returns null, so the ReloadData doesn't work. The delegate and datasource is connected properly in IB, and there is a referencing outlet for tableView.
Any idea what is going on here? Thanks in advance
If you added the table view controller to a container view, then you can get a reference to that controller in prepareForSegue. For a controller in a container view, prepareForSegue will be called right before the parent controller's viewDidLoad, so you don't need to do anything to invoke it. In my example below, I've called the segue "TableEmbed" -- you need to give the segue that identifier in IB.
- (void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender {
if([segue.identifier isEqualToString:#"TableEmbed"]) {
TableViewController *tableVC = (TableViewController *)segue.destinationViewController;
[tableVC setTableViewContent];
}
}
Be aware that prepareForSegue:sender: is called before either controller's viewDidLoad is called, so you should move the initialization of your array to setTableViewContent, and your reloadTable should go into viewDidLoad.
BTW, it's not clear to me why you want to call setTableContent from your other class anyway. Why not move all the code in that method to the viewDidLoad method of the table view controller?
This is happening because you are calling a method on tableView before it actually exists. Simply initializing that class doesn't draw the table itself, so using reloadData before the table has actually been created doesn't really make any sense.
What you want to do in this situation is create your nameArray in whatever class is calling setTableViewContent, and then pass it in either via a custom init method, or by setting tableVC.nameArray before loading that table view controller.
What I would do is make custom init method like - (id)initWithArray:(NSMutableArray *)nameArr
Which should look something like this:
if (self = [super init]) {
nameArray = [nameArr copy];
}
return self;
Then where you have TableViewController *tableVC = [[TableViewController alloc]init]; put TableViewController *tableVC = [[TableViewController alloc]initWithArray:theNameArray]; where theNameArray is the content in setTableViewContent (which you are now generating in the same class that calls the table view instead of in the table view itself).
Make sense?
I solved a similar situation by creating a "safe" reload method on the UITableViewController:
- (void)reloadTableViewData
{
if ([self isViewLoaded])
[self.tableView reloadData];
}
According to the docs for isViewLoaded:
Calling this method reports whether the view is loaded. Unlike the view property, it does not attempt to load the view if it is not already in memory.
Therefore it is safe to call reloadTableViewData on the table view controller at any time.
I'm a little new to iOS development. I have these methods declared and implemented in two separate view controllers (a Master view controller and an Editor view controller) and need to pass data through from the editor to the master. The master contains a table view that needs to update with the appropriate name. (Note: I used the default Master-Detail Application template for iPhone. I didn't manually create this with the Single-View Application)
Currently, the UITableView inside the MasterViewController doesn't update with a new cell. It's been such a hectic week for me, I must just be missing something. Here's the code for the Master View Controller:
#implementation FTMasterViewController
#synthesize bPlusMinusField, cPlusMinusField, cTerm, bTerm;
-(void) passTrinomial:(CCTrinomial *)tri withBPlusMinusField:(NSString *)bField withBTerm:(double)bTermField withCPlusMinusField:(NSString *)cField withCTerm:(double)cTermField {
//allocate the array
if (!self.trinomials) {
self.trinomials = [[NSMutableArray alloc] init];
}
//set Master VC properties to tri fields passed in
self.bPlusMinusField = bField;
self.cPlusMinusField = cField;
self.bTerm = bTermField;
self.cTerm = cTermField;
NSString *trinomial = [NSString stringWithFormat:#"x² %# %g %# %g", bPlusMinusField, bTerm, cPlusMinusField, cTerm];
[self.trinomials insertObject:trinomial atIndex:0];
NSLog(#"%lu", (unsigned long)[self.trinomials count]);
}
#pragma mark - Table View
- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section
{
return [self.trinomials count];
}
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:#"Cell" forIndexPath:indexPath];
cell.textLabel.text = [NSString stringWithFormat:#"x² %# %g %# %g", bPlusMinusField, bTerm, cPlusMinusField, cTerm];
return cell;
}
- (void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender
{
if ([[segue identifier] isEqualToString:#"showDetail"]) {
NSIndexPath *indexPath = [self.tableView indexPathForSelectedRow];
NSDate *object = _objects[indexPath.row];
[[segue destinationViewController] setDetailItem:object];
}
}
#end
This is the code that I deemed necessary to see to fix the problem: obviously, I have the default overridden methods in the rest of the implementation.
This is the Editor View Controller code. When the thought appears for you, yes, the "done" button is linked to the -handleDoneButtonPushed: method in my Main Storyboard.
-(IBAction)handleDoneButtonPushed:(id)sender {
[self dismissViewControllerAnimated:YES completion:NULL];
FTMasterViewController *masterVC = [[FTMasterViewController alloc] init];
[masterVC passTrinomial:factoring withBPlusMinusField:bPlusMinusField.text withBTerm:[bTriField.text doubleValue] withCPlusMinusField:cPlusMinusField.text withCTerm:[cTriField.text doubleValue]];
}
This editor view controller simply gets some values in the form of a UITextField and hands them off to the Master View Controller through an object of that class. Again, when I click the Done button on my top nav-bar, it dismisses the Editor View Controller but doesn't update the table view with those values retrieved.
Help would be greatly appreciated. :)
-(IBAction)handleDoneButtonPushed:(id)sender
{
[self dismissViewControllerAnimated:YES completion:NULL];
FTMasterViewController *masterVC = [[FTMasterViewController alloc] init];
[masterVC passTrinomial:factoring
withBPlusMinusField:bPlusMinusField.text
withBTerm:[bTriField.text doubleValue]
withCPlusMinusField:cPlusMinusField.text
withCTerm:[cTriField.text doubleValue]];
}
This is wrong, you already has an instance of MasterViewController you should not instantiate a new one, pass the data and expect the previous one to update the detailed value.
You should use the delegation pattern.
Create a Protocol in FTEditorController. A detailed post on implementing Delegates in Objective-C
#protocol FTEditorControllerDelegate <NSObject>
#optional
- (void)editorController:(FTEditorViewController *)editorController didCompleteEditingTrinomial:(NSString *)trinomial;
#end
When you set MasterController as delegate of EditorController, once an event of interest occurs in EditorController, it gives that event to its delegate.
So once you are done with creating trinomial expression pass it to MasterController.
-(IBAction)handleDoneButtonPushed:(id)sender
{
[self dismissViewControllerAnimated:YES completion:NULL];
NSString *trinomial = [NSString stringWithFormat:#"x² %# %g %# %g", bPlusMinusField.text, [bTriField.text doubleValue], cPlusMinusField.text, [cTriField.text doubleValue]];
if([self.delegate respondsToSelector:#selector(editorController:didCompleteEditingTrinomial:)])
{
[self.delegate editorController:self didCompleteEditingTrinomial:trinomial];
}
}
//FTEditorControllerDelegate implementation in MasterViewController
- (void)editorController:(FTEditorViewController *)editorController didCompleteEditingTrinomial:(NSString *)trinomial{
//allocate the array
if (!self.trinomials) {
self.trinomials = [[NSMutableArray alloc] init];
}
//This condition is tricky, I assume you always want to display the edited
//trinomial expression as the first one in tableView
[self.trinomials insertObject:trinomial atIndex:0];
//Reloads the tableView to reflect the changes
[self.tableView reloadData];
}
I am new to ios programming and asking here, but I visit all the time! I am stumped at why I am getting this problem, it compiles with no errors and I have checked and checked all my outlets and identifiers in my MainStoryboard.
I have 2 UITableViewControllers, I am passing a string from the first to the second when the user selects an item in the table, so in
FirstTableViewController.m
- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath
{
int sel = indexPath.row;
if (sel == 0) {
_keyName = [NSString stringWithString:_string1];
NSLog(#"the table was selected at cell 0, %#", _string1);
}
if (sel == 1) {
_keyName = [NSString stringWithString:_string2];
}
// more code below...
}
- (void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender
{
if ([segue.identifier isEqualToString:#"ResultsSegue"])
{
UINavigationController *navigationController = segue.destinationViewController;
ResultsViewController *rv = [[navigationController viewControllers] objectAtIndex:0];
[rv setResults: _keyName];
NSLog(#"in the progress view, %#", _keyName);
//rv.delegate = (id)self;
rv.delegate = self;
}
}
And in my ResultsViewController.m
- (void)viewDidLoad
{
[super viewDidLoad];
NSLog(#"in the results, %#", _results);
NSLog(#"in the results view");
}
In the NSlog readout I get:
...
in the progress view, (null)
in the results, (null)
in the progress view, The Right String
Warning: Attempt to present on
Then when I hit the cancel button to return to the firstTableview and press the detail view again it no longer shows null..
in the progress view, The Right String
in the results, The Right String
in the progress view, The Right String
The problem is prepareForSegue is called before didSelectRowAtIndexPath. You should just eliminate the didSelectRowAtIndexPath method, and do everything in prepareForSegue. You can use the following line to get the indexPath you need:
NSIndexPath *indexPath = [self.tableView indexPathForSelectedRow];
Rob's answer helped me, as well - thanks! I'm coding in Swift, so for those who run into this while Swifting, here's how to get the index (or index row) clicked on in Swift 3:
var rowClicked = (self.tableView.indexPathForSelectedRow?.row)!
May be your segue is connection start form the table view cell instead of view controller.
I had same issue I removed the segue from the table view cell and added back at view controller level.