I have a Master-Detail application. When the user selects a row in the Master table(MasterViewController),I want to open another UITableViewController (DocumentViewController) and display data here(not in the Detail view).
When I run the application,"numberOfSectionsInTableView" for DocumentViewController is called but "cellForRowAtIndexPath" is not called.
The code in DocumentViewController.m is:
- (void)viewDidLoad
{
[super viewDidLoad];
[docTable setDataSource:self];
[docTable setDelegate:self];
EDViPadDocSyncService *service = [[EDViPadDocSyncService alloc]init];
EDVCategory *cat = [EDVCategory alloc];
cat.categoryId = [catId intValue];
[service getDocsByCatId:self action:#selector(getDocsByCatIdHandler:) category:cat];
[self.docTable reloadData];
}
- (void) getDocsByCatIdHandler: (id)value {
//snip......
[docTable reloadData];
}
- (void)viewDidUnload
{
[super viewDidUnload];
}
- (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView
{
return 1;
}
- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section
{
return [self.myDocList count];
}
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
DocumentCell *cell = [tableView dequeueReusableCellWithIdentifier:#"DocumentCell"];
if (cell == nil)
{
cell = [[[DocumentCell alloc]initWithStyle:UITableViewCellStyleDefault reuseIdentifier:#"DocumentCell"] autorelease];
}
NSLog(#"cell text=%#",[self.myDocList objectAtIndex:indexPath.row]);
cell.lblDocName.text = [self.myDocList objectAtIndex:indexPath.row];
return cell;
}
Thanks for the help.
EDIT:- I have set the delegate and datasource properties for the table.The table is declared as "#property (nonatomic,retain) IBOutlet UITableView *docTable;" in the DocumentViewController.h. I have tried using 'viewwillappear' as well as 'initwithstyle' but these doesn't seem to work either.
Related
I am trying to create a search bar in Xcode so when you search for an item, you can click on the search result cell and it will go to a view controller but all it is doing now is going to the sea view controller and just displaying the label of the cell i clicked on.
Here is my .m file
#interface ListTableViewController () <UISearchDisplayDelegate>
#property (strong, nonatomic) NSArray *dataArray;
#property (strong, nonatomic) NSArray *searchResults;
#end
#implementation ListTableViewController
- (id)initWithStyle:(UITableViewStyle)style
{
self = [super initWithStyle:style];
if (self) {
// Custom initialization
}
return self;
}
- (void)viewDidLoad
{
[super viewDidLoad];
self.dataArray = [NSArray arrayWithObjects:#"Tomb Raider", #"Little Big Planet", #"Unchanted 3", #"BlackOps 2", nil];
}
- (void)didReceiveMemoryWarning
{
[super didReceiveMemoryWarning];
// Dispose of any resources that can be recreated.
}
- (void)filterContentForSearchText: (NSString *) searchText
{
NSPredicate *resultPredicate = [NSPredicate predicateWithFormat:#"SELF CONTAINS[cd] %#", searchText];
self.searchResults = [self.dataArray filteredArrayUsingPredicate:resultPredicate];
}
-(BOOL)searchDisplayController:(UISearchDisplayController *)controller shouldReloadTableForSearchString:(NSString *)searchString
{
[self filterContentForSearchText:searchString];
return YES;
}
#pragma mark - Table view data source
- (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView
{
return 1;
}
- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection: (NSInteger)section
{
if (tableView == self.tableView) {
return [self.dataArray count];
} else { // (tableView == self.searchDisplayController.searchResultsTableView)
return [self.searchResults count];
}
}
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
static NSString *CellIdentifier = #"Cell";
UITableViewCell *cell = [self.tableView dequeueReusableCellWithIdentifier:CellIdentifier forIndexPath:indexPath];
if (tableView == self.tableView) {
cell.textLabel.text = [self.dataArray objectAtIndex:indexPath.row];
} else {
cell.textLabel.text = [self.searchResults objectAtIndex:indexPath.row];
}
return cell;
}
#pragma mark - Table view delegate
-(void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender
{
if ([segue.identifier isEqualToString:#"showDetails"]) {
DetailsViewController *dvc = segue.destinationViewController;
NSIndexPath *indexPath = nil;
if ([self.searchDisplayController isActive]) {
indexPath = [self.searchDisplayController.searchResultsTableView indexPathForSelectedRow];
dvc.sendLabel = [self.searchResults objectAtIndex:indexPath.row];
return;
} else{
indexPath = [self.tableView indexPathForSelectedRow];
dvc.sendLabel = [self.dataArray objectAtIndex:indexPath.row];
return;
}
}
}
#end
Thanks, anything will help.
You must implement this delegate method :
// Method returns the clicked row.
- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath {
YourPushedViewController *ypVC = [[YourPushedViewController alloc] initWithNibName:#"YourPushedViewController" bundle:nil];
ypVC.selectedText = myResultArray[indexPath.row];
[self.navigationController pushViewController:ypVC animated:YES];
}
That method is response for selecting row and passing selected result to another view.
This is hint for you :Passing Data between View Controllers
I have this scene:
I added one simple "table view" and next +1 into "prototype cells":
informacao.h
NSMutableArray *arrCursos;
informacao.m
- (void)viewDidLoad
{
[super viewDidLoad];
self.title = #"Informações";
arrCursos = [[NSMutableArray alloc] init];
[arrCursos addObject:#"[G] - Odontologia"];
[arrCursos addObject:#"[P/LT] - Odontologia"];
}
- (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView
{
return 1;
}
- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section
{
return [arrCursos count];
}
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
static NSString *CellIdentifier = #"cursosCell";
UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier];
if(cell == nil) {
cell = [[UITableViewCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:CellIdentifier];
}
cell.textLabel.text = [arrCursos objectAtIndex:indexPath.row];
return cell;
}
I don't know why my table view is empty, like this:
Now, there are a few places you should check. First is whether the table view data source has been connected to the view controller. Check if the number of rows data source method is called and whether it is returning the expected number of rows.
- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section
{
NSLog(#"%d", arrCursos.count);
return [arrCursos count];
}
Second is to check whether you have specified the cell identifier cursosCell in your storyboard.
the problem was missing delegate and datasource
Have a table view with three rows, but the text in the cellForRowAtIndexPath is not displaying in the screen.
Any idea what's wrong?
Here is the code
AllListsViewController.m
#import "AllListsViewController.h"
#interface AllListsViewController ()
#end
#implementation AllListsViewController
- (id)initWithStyle:(UITableViewStyle)style
{
self = [super initWithStyle:style];
if (self) {
// Custom initialization
}
return self;
}
- (void)viewDidLoad
{
[super viewDidLoad];
// Uncomment the following line to preserve selection between presentations.
// self.clearsSelectionOnViewWillAppear = NO;
// Uncomment the following line to display an Edit button in the navigation bar for this view controller.
// self.navigationItem.rightBarButtonItem = self.editButtonItem;
}
- (void)viewDidUnload
{
[super viewDidUnload];
// Release any retained subviews of the main view.
// e.g. self.myOutlet = nil;
}
- (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation
{
return (interfaceOrientation == UIInterfaceOrientationPortrait);
}
#pragma mark - Table view data source
- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section
{
return 3;
}
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
static NSString *CellIdentifier = #"Cell";
UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier];
if (cell == nil) {
cell = [[UITableViewCell alloc]initWithStyle:UITableViewCellStyleDefault reuseIdentifier:CellIdentifier];
}
cell.textLabel.text = [NSString stringWithFormat:#"List %d", indexPath.row];
return cell;
}
/*
// Override to support conditional editing of the table view.
- (BOOL)tableView:(UITableView *)tableView canEditRowAtIndexPath:(NSIndexPath *)indexPath
{
// Return NO if you do not want the specified item to be editable.
return YES;
}
*/
/*
// Override to support editing the table view.
- (void)tableView:(UITableView *)tableView commitEditingStyle:(UITableViewCellEditingStyle)editingStyle forRowAtIndexPath:(NSIndexPath *)indexPath
{
if (editingStyle == UITableViewCellEditingStyleDelete) {
// Delete the row from the data source
[tableView deleteRowsAtIndexPaths:#[indexPath] withRowAnimation:UITableViewRowAnimationFade];
}
else if (editingStyle == UITableViewCellEditingStyleInsert) {
// Create a new instance of the appropriate class, insert it into the array, and add a new row to the table view
}
}
*/
/*
// Override to support rearranging the table view.
- (void)tableView:(UITableView *)tableView moveRowAtIndexPath:(NSIndexPath *)fromIndexPath toIndexPath:(NSIndexPath *)toIndexPath
{
}
*/
/*
// Override to support conditional rearranging of the table view.
- (BOOL)tableView:(UITableView *)tableView canMoveRowAtIndexPath:(NSIndexPath *)indexPath
{
// Return NO if you do not want the item to be re-orderable.
return YES;
}
*/
#pragma mark - Table view delegate
- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath
{
[self performSegueWithIdentifier:#"ShowChecklist" sender:nil];
}
#end
There are a lot of things that you should do. The first one being conforming to the UITableViewDelegate and UITableViewDataSource protocols (using the <Protocol_Name_One, Protocol_Name_Two> syntax). Then you have to call (in your viewDidLoad method):
[theTableView setDelegate:self];
[theTableView setDataSource:self];
I'm new to X-Code and have just started working on my first app. I'm using Storyboards. To the Navigation Controller scene I've added a MasterViewController with two cells, which leads to two DetailViewControllers (Detail1 & Detail 2).
Number of Columns = 1
Number of rows in columns = 2
I've added a Reuse Indicator for the cells in the attributes inspector, and made the connection in the storyboard.
But when I run the app, I can only see the first cell x2.
When I look in the MasterViewController.m I can see the code for the first cell, but I don't understand how to insert the second cell etc!
I know the solution is easy and I've been looking for the answer for 3 days now, I feel stupid but I really need some help now,,
Can someone help me understand how to add more cells in the code, and maybe understand the Table View Code a bit more?
This is the code for the table view so far:
#pragma mark - Table view data source
- (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 2;
}
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
static NSString *CellIdentifier = #"Formal";
UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier];
// Configure the cell...
return cell;
}
/*
// Override to support conditional editing of the table view.
- (BOOL)tableView:(UITableView *)tableView canEditRowAtIndexPath:(NSIndexPath *)indexPath
{
// Return NO if you do not want the specified item to be editable.
return YES;
}
*/
/*
// Override to support editing the table view.
- (void)tableView:(UITableView *)tableView commitEditingStyle:(UITableViewCellEditingStyle)editingStyle forRowAtIndexPath:(NSIndexPath *)indexPath
{
if (editingStyle == UITableViewCellEditingStyleDelete) {
// Delete the row from the data source
[tableView deleteRowsAtIndexPaths:[NSArray arrayWithObject:indexPath][withRowAnimation:UITableViewRowAnimationFade];
}
else if (editingStyle == UITableViewCellEditingStyleInsert) {
// Create a new instance of the appropriate class, insert it into the array, and add a new row to the table view
}
}
*/
/*
// Override to support rearranging the table view.
- (void)tableView:(UITableView *)tableView moveRowAtIndexPath:(NSIndexPath *)fromIndexPath toIndexPath:(NSIndexPath *)toIndexPath
{
}
*/
/*
// Override to support conditional rearranging of the table view.
- (BOOL)tableView:(UITableView *)tableView canMoveRowAtIndexPath:(NSIndexPath *)indexPath
{
// Return NO if you do not want the item to be re-orderable.
return YES;
}
*/
#pragma mark - Table view delegate
- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath
{
// Navigation logic may go here. Create and push another view controller.
/*
<#DetailViewController#> *detailViewController = [[<#DetailViewController#> alloc] initWithNibName:#"<#Nib name#>" bundle:nil];
// ...
// Pass the selected object to the new view controller.
[self.navigationController pushViewController:detailViewController animated:YES];
*/
}
#end
Lets say you have an array called arr.
Then you have to return the number of objects in the array when numberOfRowsInSection gets called.
- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section
{
// Return the number of rows in the section.
return [arr count];
}
Your cellForRowAtIndexPath delegate method should look like this to print out the strings in the array.
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath {
static NSString *CellIdentifier = #"Formal";
UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier];
if (cell == nil) {
cell = [[[UITableViewCell alloc] initWithStyle:UITableViewCellStyleSubtitle
reuseIdentifier:CellIdentifier] autorelease];
}
// Configure the cell.
cell.textLabel.text = [arr objectAtIndex:indexPath.row];
return cell;
}
Hope this helps!
My code now looks like this:
- (void)viewDidLoad
{
[super viewDidLoad];
omMeny = [[NSMutableArray alloc] init];
//Add items
[omMeny addObject:#"Formålet med guiden"];
[omMeny addObject:#"Aromahjulet"];
[omMeny addObject:#"Fagterm"];
//Set the title
self.navigationItem.title = #"Om Rødvin";
}
//dealloc method declared in RootViewController.m
- (void)dealloc {
[omMeny release];
[super dealloc];
}
// Uncomment the following line to preserve selection between presentations.
// self.clearsSelectionOnViewWillAppear = NO;
// Uncomment the following line to display an Edit button in the navigation bar for this view controller.
// self.navigationItem.rightBarButtonItem = self.editButtonItem;
- (void)viewDidUnload
{
[super viewDidUnload];
// Release any retained subviews of the main view.
// e.g. self.myOutlet = nil;
}
- (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation
{
return (interfaceOrientation == UIInterfaceOrientationPortrait);
}
#pragma mark - Table view data source
- (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 2;
return [omMeny count];
}
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
static NSString *CellIdentifier = #"Om";
UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier];
if (cell == nil) {
cell = [[[UITableViewCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:CellIdentifier] autorelease];
}
// Set up the cell...
NSString *cellValue = [omMeny objectAtIndex:indexPath.row];
cell.textLabel.text = cellValue;
// Configure the cell...
return cell;
}
#pragma mark - Table view delegate
- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath
{
// Navigation logic may go here. Create and push another view controller.
/*
<#DetailViewController#> *detailViewController = [[<#DetailViewController#> alloc] initWithNibName:#"<#Nib name#>" bundle:nil];
// ...
// Pass the selected object to the new view controller.
[self.navigationController pushViewController:detailViewController animated:YES];
*/
}
#end
with this in the .h
#interface OmMasterViewController : UITableViewController {
NSMutableArray *omMeny;
}
Am trying to run the following code for a table with initWithStyle:UITableViewCellStyleSubtitle but the subtitle is not showing. Can you tell me what's wrong?
Thanks in advance!
#import "ViewController.h"
#interface ViewController ()
#end
#implementation ViewController
#synthesize listData;
- (void)viewDidLoad
{
[super viewDidLoad];
// Do any additional setup after loading the view, typically from a nib.
NSArray *array = [[NSArray alloc] initWithObjects:#"Sleepy", #"Sneezy", #"Bashful", #"Happy", #"Doc", #"Grumpy", #"Dopey", #"Thorin", #"Dorin", #"Nori", #"Ori", #"Balin", #"Dwalin", #"Fili", #"Kili", #"Oin", #"Gloin", #"Bifur", #"Bofur", #"Bombur", nil];
self.listData = array;
}
- (void)viewDidUnload
{
[super viewDidUnload];
// Release any retained subviews of the main view.
self.listData = nil;
}
- (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation
{
return (interfaceOrientation != UIInterfaceOrientationPortraitUpsideDown);
}
#pragma mark -
#pragma mark Table View Data Source Methods
- (NSInteger)tableView:(UITableView *)tableView
numberOfRowsInSection:(NSInteger)section
{
return [self.listData count];
}
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
static NSString *SimpleTableIdentifier = #"SimpleTableIdentifier";
UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:SimpleTableIdentifier];
if (cell == nil) {
cell = [[UITableViewCell alloc]
initWithStyle:UITableViewCellStyleSubtitle
reuseIdentifier:SimpleTableIdentifier];
}
UIImage *image = [UIImage imageNamed:#"star.png"];
cell.imageView.image = image;
NSUInteger row = [indexPath row];
cell.textLabel.text = [listData objectAtIndex:row];
return cell;
if (row < 7)
cell.detailTextLabel.text = #"Mr. Disney";
else
cell.detailTextLabel.text = #"Mr.Tolkien";
}
#end
return cell;
Should be the last line. It returns before setting the detailTextLabel's text property.
Also, you should have received a warning from Xcode about "unreachable code."