Custom UITableViewCell does not show it's contents - xcode

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.

Related

UIAccessibility is not selecting correct elements

I have several UIWindows in my app. Some UIWindows have very high window levels. i.e.
window.windowLevel = currentWindowLevel+1;
For some reason when turning on accessibility support, the system insists on reading out the accessibility labels of views located in the lower level window, even in cases where the views aren't even visible.
This minimal example exemplifies this behavior.
With accessibility support turned on, try to press the label in the red window. The system will read out the text from the underneath table view instead
#interface ViewController () <UITableViewDataSource>
#property (weak, nonatomic) IBOutlet UITableView *tableview;
#end
#implementation ViewController
- (void)viewDidLoad {
[super viewDidLoad];
self.tableview.dataSource = self;
[self.tableview registerClass:[UITableViewCell class] forCellReuseIdentifier:#"cell"];
dispatch_after(dispatch_time(DISPATCH_TIME_NOW, (int64_t)(1 * NSEC_PER_SEC)), dispatch_get_main_queue(), ^{
UIWindow *w = [[UIWindow alloc] initWithFrame:self.view.bounds];
w.windowLevel = self.view.window.windowLevel + 1;
w.backgroundColor = [UIColor redColor];
w.hidden = NO;
w.isAccessibilityElement = YES;
UILabel *l = [[UILabel alloc] init];
l.text = #"KUKUKUKUKUKUKUKLU";
[l sizeToFit];
l.frame = CGRectOffset(l.frame, 40, 100);
[w addSubview:l];
w.accessibilityLabel = #"Read this outloud instead";
static id window;
window = w;
});
// 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 100;
}
// Row display. Implementers should *always* try to reuse cells by setting each cell's reuseIdentifier and querying for available reusable cells with dequeueReusableCellWithIdentifier:
// Cell gets various attributes set automatically based on table (separators) and data source (accessory views, editing controls)
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath {
UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:#"cell" forIndexPath:indexPath];
cell.textLabel.text = #"Test";
return cell;
}
#end
Solution is to set the attribute
Window.accessibilityViewIsModal = YES;

Array not displaying in my tableview

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.

could not dequeue collection view when using UIImage objects in Cell

I am having trouble getting this code to run after having it crash after several iterations. The intended behaviour is to simply display images in a Collection View from an array. If I comment out all the objects in the array, it runs with an empty collection view.
logo.png exists and can be properly loaded in other parts of the app through the dropdown. Delegate and DataSource is properly set to self. The Collection View has a single cell displayed with an ImageView in it (tagged as 100) and nothing else. Having a label instead of an image view causes a crash with any objects in the array as well.
The debugging output is
Could not dequeue a view of kind: UICollectionElementKindCell with identifier Cell - must
register a nib or a class for the identifier or connect a prototype cell in a storyboard
The relevant code is the following:
ViewController.m
#import "demo_frameworkViewController.h"
#interface demo_frameworkViewController ()
#end
#implementation demo_frameworkViewController {
NSMutableArray *imageArray;
}
#synthesize imageArray;
- (void)viewDidLoad
{
imageArray = [[NSMutableArray alloc] init];
[imageArray addObject:[UIImage imageNamed:#"logo.png"]];
[imageArray addObject:[UIImage imageNamed:#"logo.png"]];
[super viewDidLoad];
// Do any additional setup after loading the view, typically from a nib.
}
- (void)didReceiveMemoryWarning
{
[super didReceiveMemoryWarning];
// Dispose of any resources that can be recreated.
}
#pragma mark Collection View Methods
-(NSInteger)numberOfSectionsInCollectionView:(UICollectionView *)collectionView {
return 1;
}
-(NSInteger)collectionView:(UICollectionView *)collectionView numberOfItemsInSection:(NSInteger)section{
return [self.imageArray count];
}
-(UICollectionViewCell *)collectionView:(UICollectionView *)collectionView cellForItemAtIndexPath:(NSIndexPath *)indexPath {
UICollectionViewCell *cell = [collectionView dequeueReusableCellWithReuseIdentifier:#"Cell" forIndexPath:indexPath];
UIImageView *imageDemo = (UIImageView *)[cell viewWithTag:100];
imageDemo.image =[imageArray objectAtIndex:indexPath.row];
[cell.layer setBorderWidth:2.0f];
[cell.layer setBorderColor:[UIColor whiteColor].CGColor];
return cell;
}
#end
ViewController.h
#import <UIKit/UIKit.h>
#interface demo_frameworkViewController : UIViewController <UINavigationControllerDelegate, UICollectionViewDelegate, UICollectionViewDataSource>
#property (nonatomic, retain) NSArray *imageArray;
#property (weak, nonatomic) IBOutlet UIImageView *imageView;
#end
The debugging output means that it cannot find a cell called 'Cell'. In your storyboard you need to set the Collection Reusable View value of the UICollectionViewCell to 'Cell' so that the UICollectionView knows what cell to use

Xcode: iPad keyboard troubles (not that simple)

I am making an app which uses many Textfields. Most of them are inside static tableViews. I use the split view application template. Every category selected from the left panel presents a storyboard scene inside a second view on the right panel.
I just want to get rid of the keyboard with the "done" button however everything i have tried that would work on a simple view fails to work under these circumstances.
Can you please help me out with this?
p.s. I try to dismiss the keyboard inside the implementation file of the presented storyboard scene. Should i do something inside the Detail Scene of the split view controller?
Here is my Scene's code:
.h
#import <UIKit/UIKit.h>
#interface AfoEsoda : UITableViewController <UITextFieldDelegate>{
}
#property (strong, nonatomic) IBOutlet UITextField *merismataTF;
-(IBAction)hideKeyboard:(id)sender;
#end
.m
#synthesize merismataTF;
- (void)viewDidLoad
{
[super viewDidLoad];
merismataTF.delegate=self ;
}
//---------Hide Keyboard-------------------
//Tried but didn't work
-(IBAction)hideKeyboard:(id)sender {
[merismataTF resignFirstResponder];
}
- (BOOL)textFieldShouldReturn:(UITextField *)textField {
[textField resignFirstResponder];
return YES;
}
//Of course i do not use both methods at the same time.
EDIT:
When i set the textfield's delegate to self i get this crash:
Try implementing the textField's delegate, set the delegate to self, and in the delegate's method
- (BOOL)textFieldShouldReturn:(UITextField *)textField
set
[textField resignFirstResponder];
Another way could be going through all of the view's subviews and if it is a text field, resign first responder:
for(int i=0;i<self.view.subviews.count;i++)
{
if([[self.view.subviews objectAtIndex:i] isKindOfClass:[UITextField class]])
{
if([[self.view.subviews objectAtIndex:i] isFirstResponder])
[[self.view.subviews objectAtIndex:i] resignFirstResponder];
}}
OK, I got it. Use this with with the textFieldShouldReturn method.
So here is your answer: You have declared your text field as a property and then use alloc and init it over and over again for each cell. Probably it only works properly for the last row.
Here is an example of how your cellForRow method should look like:
-(UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{ static NSString *cellIdentifier = #"My cell identifier";
UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier];
UITextField *newTextField;
if(cell == nil)
{
cell = [[UITableViewCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:CellIdentifier];
newTextField = [[UITextField alloc] initWithFrame:CGRectMake:(0,0,25,25)];
newTextField.tag = 1;
newTextField.delegate = self;
[cell.contentView addSubview:newTextField];
}
else
newTextField = (UITextField *)[cell.contentView viewWithTag:1];
And then, if you need the textField's value for a certaing row, simply use:
UITextField *someTextField = (UITextField *)[[tableView cellForRowAtIndexPath:indexPath].contentView viewWithTag:1];
NSLog(#"textField.text = %#", someTextField.text);

Using segues to display a UIView from UITableViewController

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.

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