have a UITableViewCell "postCell" that is an IBOutlet and is attached to a cell I have placed in my .xib. To set the text label:
- (void)viewDidAppear:(BOOL)animated
{
postCell.textLabel.text = #"TEXT";
}
Nothing ever appears.
Edit: This cell is not part of a Table View. Every answer I have seen is assuming it is. This is a single UITableViewCell.
- (NSInteger) tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section {
return 1;
}
- (UITableViewCell *) tableView:(UITableView *)tableView cellForRowAtIndexPath: (NSIndexPath *)indexPath {
static NSString *CellIdentifier = #"Cell";
PostCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier];
if (cell == nil) {
cell = [[PostCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:CellIdentifier];
}
cell.textLabel.text = #"text";
return cell;
}
You can set text label for the cell in method cellForRowAtIndexPath, please see example below.
- (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.accessoryType = UITableViewCellAccessoryDisclosureIndicator;
}
cell.textLabel.text = #"Cell Title";
return cell;
}
There are a few delegate methods that you need to implement. Here are the two most important ones
tableView:cellForRowAtIndexPath:
tableView:numberOfRowsInSection:
Here's a full tutorial on how to implement a table view.
http://www.raywenderlich.com/?p=1797
Related
I have a UITableView with sections inside of them. All works great, but I can't seem to figure out how to customize the very fist index path. For example, I know this is very easily achievable through a normal tableview like so:
-(UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
UITableViewCell*cell = [tableView dequeueReusableCellWithIdentifier:#"cell"];
if(!cell)
{
cell = [[UITableViewCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:#"cell"];
if (indexPath.row == 0)
{
cell.detailTextLabel.text = #"My Custom text";
NSLog(#"%#",pm1.customText1);
}
}
}
I have tried the above implementation and it does not seem to work for me. Is there a different approach for section headers to achieve the same result with a normal tableview? Do I need to inject a "fake" section in my dictionary?
-(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];
}
if (indexPath.row == 0) {
cell.detailTextLabel.text = #"My Custom text";
NSLog(#"%#",pm1.customText1);
}
return cell;
}
Try this
The way you have it now the first cell is customize only when cell is nil.
You should move it out of the if statement.
- (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];
}
//check for first cell
if (indexPath.row == 0) {
cell.detailTextLabel.text = #"My first Cell";
NSLog(#"%#",pm1.customText1);
}else{
cell.detailTextLabel.text = #"Other cells";
NSLog(#"other cells");
}
return cell;
}
I am writing the code to populate a UITableView from using a CoreData database wrapped in magical record. For some reason though the code docent seem to be working and my cell is considered nil. Why is this happening?
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
static NSString *CellIdentifier = #"Cell";
UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier];
// Configure the cell...
PassWhizEntity *pazz = [allPasses objectAtIndex:indexPath.row];
cell.textLabel.text = pazz.destinationTeacherAttribute;
//cell.detailTextLabel.text = [self.dateFormatter stringFromDate:pazz.dateAttribute];
if (cell == nil)
{
NSLog(#"cell was nil");
cell = [[UITableViewCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:CellIdentifier];
}
return cell;
}
it just prints cell was nil and loads a blank UITable. Any ideas?
Your code should be like
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
static NSString *CellIdentifier = #"Cell";
UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier];
if (cell == nil)
{
NSLog(#"cell was nil");
cell = [[UITableViewCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:CellIdentifier];
}
// Configure the cell...
PassWhizEntity *pazz = [allPasses objectAtIndex:indexPath.row];
cell.textLabel.text = pazz.destinationTeacherAttribute;
//cell.detailTextLabel.text = [self.dateFormatter stringFromDate:pazz.dateAttribute];
return cell;
}
You are trying to set textLabel of unallocated cell which have no effect on cell. Cell is returned nil because tableview don't have any cell that can be reused, so it is your responsibility to check for nil and make new Cell if needed.
I have a small amount of data to show in a table and so I would like to load it all. Below is my code and for some reason nothing is showing up. Can you please have a look at what I have done wrong. Thanks
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath {
NSString *CellIdentifier = [NSString stringWithFormat:#"S%1dR%1d",indexPath.section,indexPath.row];
TableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier];
if (cell == nil) {
cell = [[TableViewCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:CellIdentifier];
}
// Configure the cell...
long row = [indexPath row];
cell.BBname.text = _BBNames [row];
cell.BBtype.text = _BBTypes [row];
cell.BBimage.image = [UIImage imageNamed:_BBImages [row]];
if([self getCheckedForIndex:indexPath.row]==YES)
{
cell.accessoryType = UITableViewCellAccessoryCheckmark;
}
return cell;}
is "TableViewCell" your custom cell?
if not use "UITableViewCell" instead
if you are using interface builder for your custom cell, use initializer
[[NSBundle mainBundle] loadNibNamed: owner: options:]
also make sure your tableview delegate is set, specifically implement
- (CGFloat)tableView:(UITableView *)tableView heightForRowAtIndexPath:(NSIndexPath *)indexPath
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
static NSString *CellIdentifier = #"GenusNameCell";
GenusNameCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier];
if (cell == nil) {
cell = [[GenusNameCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:#"GenusNameCell"];
cell.GenusNameLabel.text = [genusName objectAtIndex:indexPath.row];
[cell setAccessoryType:UITableViewCellAccessoryDisclosureIndicator];
}
return cell;
}
I have a tableview with an Array of objects but when I run it. Nothing shows up. Im fairly new to xcode but Im not sure what my mistake is in the code. Can some one help me out?
If the cellForRowAtIndexPath callback is never called, it could be:
you didn't have set the dataSource of your tableview;
you didn't implement the numberOfSectionsInTableView: and/or tableView:numberOfRowsInSection: callbacks.
And if you dequeue your cell, you need to set the text outside the if branch like this:
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
static NSString *CellIdentifier = #"GenusNameCell";
GenusNameCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier];
if (cell == nil) {
cell = [[GenusNameCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:#"GenusNameCell"];
[cell setAccessoryType:UITableViewCellAccessoryDisclosureIndicator];
}
cell.GenusNameLabel.text = [genusName objectAtIndex:indexPath.row];
return cell;
}
Change the code like this your code will run,
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
static NSString *CellIdentifier = #"GenusNameCell";
GenusNameCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier];
if (cell == nil) {
cell = [[GenusNameCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:#"GenusNameCell"];
[cell setAccessoryType:UITableViewCellAccessoryDisclosureIndicator];
}
cell.GenusNameLabel.text = [[genusName objectAtIndex:indexPath.row] geniusname];
return cell;
}
geniusname is the NSString you stored the name of the person.
In my project I have tableViews with static cells as well as tableViews with dynamic cells. In order to customized I've managed to get a gradient background on the cells (grouped sytle).
It works ok with dynamic TableViews as I set the background view in cellForRowAtIndex... according to the position of the row (Top, Bottom, Middle or single).
However, when I try to implement it on the static tableview cells, it doesn't work. I've tried to implement the cellForRowAtindex... but it crashes.
Does someone have an idea?
Update: the code for cellForRow..
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
static NSString *CellIdentifier = #"Cell";
UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier];
UACellBackgroundView *bgw=[[UACellBackgroundView alloc]init];
if (indexPath.row==0) {
bgw.position = UACellBackgroundViewPositionTop;
cell.backgroundView=bgw;
}else if (indexPath.row==2){
bgw.position = UACellBackgroundViewPositionBottom;
cell.backgroundView=bgw;
}else {
bgw.position = UACellBackgroundViewPositionMiddle;
cell.backgroundView=bgw;
}
// cell.backgroundView=bgw;
return cell;
}
By the way, the Background view I got it from here: http://code.coneybeare.net/how-to-make-custom-drawn-gradient-backgrounds and here: http://pessoal.org/blog/2009/02/25/customizing-the-background-border-colors-of-a-uitableview/
if somebody is interested
It doesn't look like you are alloc the UITablViewCell, you need to alloc the cell.
For example:
- (UITableViewCell *)tableView:(UITableView *)tableView
cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
static NSString *CellIdentifier = #"Cell";
UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier];
if (cell == nil) {
// alloc the UITableViewCell
// remeber if you are not using ARC you need to autorelease this cell
cell = [[UITableViewCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:CellIdentifier];
}
cell.textLabel.text = #"Cell Name";
cell.detailTextLabel.text = #"Cell Detail";
return cell;
}
Add this statement:
if (cell == nil) {
// alloc the UITableViewCell
// remeber if you are not using ARC you need to autorelease this cell
cell = [[UITableViewCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:CellIdentifier];
}
If you have a UITableViewController subclass with a static table you should not try to dequeue cells.
Instead you should ask super for the cell. The superclass will get the cell from the storyboard and you can configure it.
Something like this:
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath {
UITableViewCell *cell = [super tableView:tableView cellForRowAtIndexPath:indexPath];
UIView *selectedBackgroundView = [[UIView alloc] init];
cell.selectedBackgroundView = selectedBackgroundView;
cell.selectedBackgroundView.backgroundColor = [UIColor mb_tableViewSelectionColor];
return cell;
}
Works for all other attributes as well.