I am having some problem to manage my cells in a tableview.
I have one table view with two sections:
The first one, I have 3 custom cells, with static cells.
The second one, I have a dynamic type.
To work with the dynamic one, no problem is occurring, but the static, I don't know how to "reuse" them.
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
if(indexpath.section = 0){
//here is the question, how to return the stactis that had already been defined
}else{
return cell //here is okay, i can return the dynamic
}
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
if(indexpath.section = 0){
//here is the question, how to return the stactis that had already been defined
static NSString *CellIdentifier = #"StaticCell";
StaticCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier];
return cell;
}else{
static NSString *CellIdentifier = #"DynamicCell";
UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier];
if(cell == nil){
cell=[[UITableViewCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:CellIdentifier];
cell.accessoryType=UITableViewCellAccessoryDisclosureIndicator;
}
return cell;
}
Related
in the ui tableview cell,
the statement if (cell == nil) is not called.
Because when i initialize the cell outside the if statement, the talbe will have some wrong label in wrong row.
how can I initialize my cell?
The #"tttestttt" NS LOG is not all the time when the table is created.
-(UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath {
static NSString *MyIdentifier = #"GroupsCell";
UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:MyIdentifier];
if (cell == nil) {
NSLog(#"tttesttttt");
cell = [[UITableViewCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:MyIdentifier];
}
}
Use the more convenient method dequeueReusableCellWithIdentifier:forIndexPath: which returns always a valid cell.
-(UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath {
static NSString *MyIdentifier = #"GroupsCell";
UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:MyIdentifier
forIndexPath:indexPath];
...
return cell;
}
dequeueReusableCellWithIdentifier: always return a cell if you're using Storyboard.
make Identifier not a fixed value
make it as index.row (convert to string as identity)
your wrong may be crate by cell refuse
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;
}
- (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.
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
myaI have this code:
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath {
if (tableView == firstTableView){
static NSString *CellIdentifier = #"Cell";
UITableViewCell *cell = (UITableViewCell *)[tableView dequeueReusableCellWithIdentifier:CellIdentifier];
if(cell == nil){
cell = [[[UITableViewCell alloc]initWithStyle:UITableViewStylePlain reuseIdentifier:CellIdentifier] autorelease] ;
}
cell.textLabel.text = [myArray objectAtIndex:indexPath.row];
return cell;
}
}
I check if tableview is firsttableview, but it give me a warning because the method haven't a "return" cell, how can I solve?
You only return a cell if the table is firstTableView. Make sure you return a cell for other tables by adding a return statement outside of your conditional.
Your code needs to return a value for all paths through that method. So, if your check for firstTableView fails, you still need to return a valid UITableViewCell from the method. You should probably read the UITableView programming guide - it walks you through proper usage of a tableview.