I am creating a simple Static Table with 2 sections, 2 Cells in each section. the Table View controller (TVC) is Subclassed.
Within each of the table cells I have a stepper Control, and and a label. I am using this to allow for updating though an IBAction from the Stepper, setting a property in the TVC. At the same time the label is updated through it's outlet to show the current value.
The outlet is defined in the #interface section of the "TVC.m" file as is normal using the standard IB tools.
On run it breaks on the Thread 1 level under UIApplicationMain in something named _0 obj_loadWeakRetained_ and the error is:
THREAD 1: EXC_BAD_ACCESS(code -2, address = 0x1da7cc0.
Any idea what I may be doing incorrectly? is there something that has to be done differently when adding views to tablecells and setting outlets to them?
Here's the code - nothing unusual.
#import "AdvancedTVC.h"
#interface AdvancedTVC ()
- (IBAction)stepperChanged:(UIStepper *)sender;
- (IBAction)switchToggled:(UISwitch *)sender;
#end
#implementation AdvancedTVC
- (IBAction)stepperChanged:(UIStepper *)sender {
}
- (IBAction)switchToggled:(UISwitch *)sender {
}
- (id)initWithStyle:(UITableViewStyle)style
{
self = [super initWithStyle:style];
if (self) {
// Custom initialization
}
return self;
}
- (void)viewDidLoad
{
[super viewDidLoad];
}
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
UITableViewCell *cell = [super tableView:tableView cellForRowAtIndexPath:indexPath];
// Configure the cell...
return cell;
}
#pragma mark - Table view delegate
- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath
{
}
#end
Related
I am passing a mutable array over from another viewcontroller by saving it in nsuserdefaults. I then retrieve it in the new viewcontroller in which it nslogs just fine. I run into a problem when my code reaches numberofrowsinsections. It seems like my tableview is not recognizing my array object. Thanks for any help as I am new at coding.
#import "ViewController.h"
#import "RecordView.h"
#import "bookCellTableViewCell.h"
#interface ViewController ()
#end
#implementation ViewController
#synthesize arr;
- (void)viewDidLoad
{
[super viewDidLoad];
NSMutableArray *arr = [[NSMutableArray alloc]init];
arr = [[NSUserDefaults standardUserDefaults] valueForKey:#"projects"];
NSLog(#"arr%#", [arr description]);
#pragma mark - Table view data source
// Do any additional setup after loading the view, typically from a nib.
}
- (void)didReceiveMemoryWarning
{
[super didReceiveMemoryWarning];
// Dispose of any resources that can be recreated.
}
-(NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section
{
return [arr count];
}
-(UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
//static NSString *CellIdentifier = #"Cell";
bookCellTableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:#"ToBook"];
if(cell != nil)
{
cell.songTitle.text = [arr objectAtIndex:indexPath.row];
testLabel.text = #"Hello";
}
return cell;
}
- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath{
UITableViewCell *cell = [bookView cellForRowAtIndexPath:indexPath];
}
#end
It's a scope issue:
You have declared your datasource in viewDidLoad
NSMutableArray *arr = [[NSMutableArray alloc]init];
That's not correct, your datasource should be a property , or a variable on class scope at least.
You should initialize it in viewDidLoad but declare it on the class level.
It seems like you have one property called arr already, a smart compiler should warn you that is ambiguous.
To fix this just remove NSMutableArray * part of that line, just like this:
arr = [[NSMutableArray alloc]init];
You are also misusing NSUserdefault it is not meant to pass data between controller, it is more appropriate for storing basic user settings values.
To pass data, simply set values on the ViewController properties before presenting it.
In Xcode 5.1, using StoryBoards, I'm having trouble getting a custom UITableViewCell to show it's contents. The cell appears -- I can tap to select it -- but the label text doesn't appear.
I've given the Cell my custom class GCell and identifier MyCell
I've connected an IBOutlets to a label in the prototype cell.
#import <UIKit/UIKit.h>
#interface GCell : UITableViewCell
#property (strong, nonatomic) IBOutlet UILabel *nameLabel;
#end
In my class that extends UITableViewController, I have
#implementation PayGroupViewController
- (id)initWithStyle:(UITableViewStyle)style
{
NSLog (#"[PayGroupViewController] initWithStyle");
self = [super initWithStyle:style];
if (self) {
}
return self;
}
- (void)viewDidLoad
{
[super viewDidLoad];
self.tableView.delegate = self;
self.tableView.dataSource = self;
// [self.tableView registerClass:[GCell class] forCellReuseIdentifier:#"MyCell"];
_groups = [NSMutableArray arrayWithCapacity:20];
GroupModel *gm = [[GroupModel alloc] init];
gm.title = #"DINNER";
gm.names = [NSMutableArray arrayWithCapacity:10];
[gm.names addObject:#"Me"];
[gm.names addObject:#"Albert"];
[_groups addObject:gm];
NSLog (#"[PayGroupViewController] viewDidLoad. [self groups].count:%d" ,[self groups].count);
}
- (void)didReceiveMemoryWarning
{
[super didReceiveMemoryWarning];
// Dispose of any resources that can be recreated.
}
- (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView
{
return 1;
}
- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section
{
NSLog (#"[PayGroupViewController] tableView. [self groups].count:%d" ,[self groups].count);
return [self groups].count;
}
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
NSLog (#"[PayGroupViewController] tableView cellForRowAtIndexPath");
GCell *c = (GCell *)[tableView dequeueReusableCellWithIdentifier:#"MyCell" forIndexPath:indexPath];
GroupModel *group = [self.groups objectAtIndex:indexPath.row];
NSLog (#"[PayGroupViewController] group.title: %#",group.title); // Outputs "DINNER"
c.nameLabel.text = group.title; // It does not show up
NSLog (#"[PayGroupViewController] cell: %#",c); // outputs <GCell: 0x9976ed0, etc. so it does exist
NSLog (#"[PayGroupViewController] cell.nameLabel: %#",c.nameLabel); // outputs (null)
return c;
}
Also, here is the entire xCode project if anyone cares to take a look.
http://www.brainjelly.com/WhoPaid.zip
Note that the prototype cell has a Disclosure Indicator Accessory, but that doesn't appear either.
Thanks… I've looked extensively over the other posts with this issue but none of those solutions helped me.
There are 2 problems in your xCode project.
You shouldn't register custom cell class in your code for prototype cells. Storyboard does that for you. When you register same class, you are basically overriding the one created by storyboard.
In your prototype cell there is an undefined outlet named "title", which is connected to Content View. Define or delete it.
After these, clear the project and recompile, it should be ok.
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;
}
I am trying to connect a UITableViewController to a UIView using storyboards. I have a TabBarController that connects to a Navigation Controller that displays a UITableViewController, displaying a small array. I want to click on a row and that trigger a simple UIView with a label, still displayed in the UINavigationController so I can navigate back to the UITableViewController
I can get the UITableViewController to display OK, with the array, but I can't get the row to trigger when I select it.
This is my UITableViewController (AtoZController.m) file:
#import "AtoZController.h"
#import "StoreDetailsView.h"
#interface AtoZController ()
#end
#implementation AtoZController
- (void)viewDidLoad
{
[super viewDidLoad];
self.title = NSLocalizedString(#"A to Z", #"An A to Z List of Stores");
AtoZArray = [[NSMutableArray alloc] init];
[AtoZArray addObject:#"Apple"];
[AtoZArray addObject:#"Boots"];
[AtoZArray addObject:#"Topman"];
}
- (void)viewDidUnload
{
[super viewDidUnload];
// Release any retained subviews of the main view.
}
- (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation
{
if ([[UIDevice currentDevice] userInterfaceIdiom] == UIUserInterfaceIdiomPhone) {
return (interfaceOrientation != UIInterfaceOrientationPortraitUpsideDown);
} else {
return YES;
}
}
#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 [AtoZArray count];
}
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
static NSString *CellIdentifier = #"Cell";
UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier];
if (!cell) {
cell = [[UITableViewCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:CellIdentifier];
}
// Configure the cell...
NSInteger row = [indexPath row];
cell.textLabel.text = [AtoZArray objectAtIndex:row];
return cell;
}
I have a segue connected, named storeDetailsSegue, from the UITableViewController to a UIView. I am attempting to use the prepareForSeque method to trigger the next view but have had no luck with the following code.
-(void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender {
NSIndexPath *path = [self.tableView indexPathForSelectedRow];
StoreDetailsView *detail = [self detailForIndexPath:path];
[segue.destinationViewController setDetail:detail];
}
As it keeps saying there is an error as there is 'No visible #interface for "AtoZController declares the selector 'detailForIndexPath'". I may be doing something completely wrong as I have never used storyboards before. What I want is for a simple UIView to display a label that dynamically changes to display the row number that has been selected.
I don't know if the UITableViewController should infact be a UITableView but as I have never used segues or storyboards I have no idea what could be causing the problem.
Any advice at all would be greatly appreciated.
UPDATE:
So I managed to get the UIViewController to display but still can't get the label to update before I display the view.