Hi, Iam new to iPhone apps. I have a problem with tableview. Here I want to add checkmark when I click on the cell, it's working fine. But whenever I click on another cell then the before cell should not show the checkmark.Thanx in advance.
I wrote an example project for this a while ago ExclusiveCheckedTableView
A cell's accessory type is set by the UITableViewDataSource protocol. This code snippet toggles the cell's accessory type between 'none' and 'checkmark':
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
static NSString *CellIdentifier = #"checkableTableViewCell";
OEListTableViewCell *cell = (OEListTableViewCell *)[tableView dequeueReusableCellWithIdentifier:CellIdentifier];
if (cell == nil) {
cell = [[OEListTableViewCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:CellIdentifier];
}
cell.accessoryType = (cell.accessoryType == UITableViewCellAccessoryCheckmark) ? UITableViewCellAccessoryNone : UITableViewCellAccessoryCheckmark;
}
Related
I have a UITableView with a custom cell using Storyboards. All the objects inside the custom cell work but when I scroll in my UITableView the objects do not move:
Here is my code:
- (UITableViewCell *)tableView:(UITableView *)tableview cellForRowAtIndexPath:(NSIndexPath *)indexPath {
static NSString *CellIdentifier = #"MainCell";
MainCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier];
if (cell == nil) {
cell = [[MainCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:CellIdentifier];
}
cell.subtitle.text = [NSString stringWithFormat:#"%#",theEvent.startDate];
cell.accessoryType = UITableViewCellAccessoryDisclosureIndicator;
return cell;
}
Any ideas on what I have done wrong? Thanks.
I figured out the problem. The objects that I had placed on the UITableViewCell were not actually inside the cell but on top of the UITableView and therefore they were acting as "floating" objects.
I have a table with a few rows, and the place holder text for all is the same. How can I programmatically change the placeholder text of only the first one?
Thanks!
You need to run an if statement to check the index of the cell. 0 is the first index, so you would need to check to see if the row is 0.
- (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] autorelease];
}
if (indexPath.row == 0)
cell.textLabel.text = #"First Cell";
else
cell.textLabel.text = #"Not First Cell";
}
In order to access your cell AFTER the cell was created/reused, try the - (UITableViewCell *)cellForRowAtIndexPath:(NSIndexPath *)indexPath method of your uitableview object! See the following Apple doc for a detailed elaboration on this method.
Note:
Return Value
An object representing a cell of the table or nil if the cell is not
visible or indexPath is out of range.
I am using ios5 storyboards with a UITableViewController with a UITableViewCell subclass. I do not want to design the visual elements of the cell in the storyboard designer for the view, because I want to use a reusable subclass of UITableViewCell (specifically TDBadgedCell).
I have set my cell identifier in the storyboard designer, and all of the rows load correctly in the UITableView as long as I'm not setting any of the properties unique to TDBadgedCell. If I set the badgeString property though which is unique to TDBadgedCell, I get an exception. I narrowed down that dequeueReusableCellWithIdentifier: is not returning a cell of type TDBadgedCell.
I'm only running into this with a UITableViewController. I have a UIViewController with an embedded UITableView set up in the same fashion and it's not an issue. Any ideas?
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath*)indexPath
{
static NSString *CellIdentifier = #"PhoneNumberCell";
TDBadgedCell *cell = (TDBadgedCell*)[tableView dequeueReusableCellWithIdentifier:CellIdentifier];
if (cell == nil) {
cell = [[TDBadgedCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:CellIdentifier];
}
if ([cell isKindOfClass:[TDBadgedCell class]])
{
NSLog(#"It is TDBadgedCell");
}
else
NSLog(#"It is NOT TDBadgedCell");
I had a similar issue in that I am subclassing UITableViewCell but not using storyboard. Here is my solution to using different cell classes dependent on if the user had purchase the unlock feature of the app. Hope it helps someone.
In a nutshell, I had the cell with several objects including a UITextView object. I wanted to lock down the copy and paste feature of the UITextView object in the lite version but then release the feature once the user had purchased in in-app product.
I had two UITableViewCell classes, one with UITextView as it is and another with UITextView subclassed with canBecomeFirstresponder returning NO. That way the user could still scroll up and down the UITextview data but not copy and paste the data.
Here is the code and all I had to do was rename the reuse identifiers.
WHY? Because [self.tableview reloadData] would not rebuild the cells with the new class as the cell was still in existence. New cells off the screen would get the new class but existing ones would not. This solution rebuilds all cells once off after the purchase unlocking the added feature.
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
if (your test if in-app was purchased is yes)
{
static NSString *MyIdentifier = #"MyCell";
FrontCell *cell = (FrontCell *)[tableView dequeueReusableCellWithIdentifier:MyIdentifier];
if (cell == nil)
{
cell = [[FrontCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:MyIdentifier];
cell.selectionStyle = UITableViewCellSelectionStyleNone;
cell.shouldIndentWhileEditing = NO;
}
//....///
cell.trackDetails.text = [yourObject objectAtIndex:indexPath.row];
cell.trackDetails.delegate = self;
cell.trackDetails.tag = indexPath.row;
return cell;
}
else // inapp not purchased
{
static NSString *MyLockedIdentifier = #"MyLockedCell";
FrontCellLocked *cell = (FrontCellLocked *)[tableView dequeueReusableCellWithIdentifier:MyLockedIdentifier];
if (cell == nil)
{
cell = [[FrontCellLocked alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:MyLockedIdentifier];
cell.selectionStyle = UITableViewCellSelectionStyleNone;
cell.shouldIndentWhileEditing = NO;
}
//....///
cell.trackDetails.text = [yourObject objectAtIndex:indexPath.row];
cell.trackDetails.delegate = self;
cell.trackDetails.tag = indexPath.row;
return cell; }
}
In storyboard,you can set the Custom Class property for a subclass of UITablviewCell.
Then dequeueReusableCellWithIdentifier method will return cell with the type of your subclass.
I think you are using wrong method for dequeuing the cells.
-(UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath{
UITableViewCell *cell = [self.tblProfileInfo dequeueReusableCellWithIdentifier:#"PostCell" forIndexPath:indexPath];
cell.selectionStyle = UITableViewCellSelectionStyleNone;
return cell;
}
You forgot for indexPath at the end.
In iOS5, using ARC and prototype cells for tableView on storyboard, can I replace the code below:
static NSString *CellIdentifier = #"Cell";
UITableViewCell *cell = [tableView
dequeueReusableCellWithIdentifier:CellIdentifier];
if (cell == nil) {
cell = [[UITableViewCell alloc]
initWithStyle:UITableViewCellStyleDefault
reuseIdentifier:CellIdentifier];
}
// Configure the cell...
return cell;
With this simple code??:
UITableViewCell *cell = [tableView
dequeueReusableCellWithIdentifier:#"Cell"];
return cell;
I saw this on this link:
http://www.raywenderlich.com/5138/beginning-storyboards-in-ios-5-part-1
Thank's in advance!
Arildo
Sure, your code are right, storyboard automaticaly alloc new cells, this code work great:
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
RoadbookCell *cell = (RoadbookCell *)[tableView dequeueReusableCellWithIdentifier:#"RoadbookCell"];
//Configure cell
//[cell.lab1 setText:#"Test"];
return cell;
}
This is the way Apple intends it to be used, but I recommend against it. There is a bug that causes dequeueReusableCellWithIdentifier to return nil when VoiceAssist is enabled on a device. That means your app will crash for users with this option turned on. This is still a problem as of iOS 5.1.1
You can find more info and a workaround here:
http://hsoienterprises.com/2012/02/05/uitableview-dequeuereusablecellwithidentifier-storyboard-and-voiceover-doesnt-work/
The last paragraph has the work-around
I want to make a table view in my iPhone Application.. In that table each shall contains 1 image, some text of line, some symbols, etc.. I don't now how to customize our cell of table. Please provide some help if you have..
I think you can use a default UITableViewCell to do what you described by initializing the Cell (in - (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath ) with the proper UITableViewCellStyle
e.g.:
-(UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath {
static NSString *CellIdentifier = #"Cell";
UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier];
if (cell == nil) {
cell = [[[UITableViewCell alloc] initWithStyle:UITableViewCellStyleSubtitle reuseIdentifier:CellIdentifier] autorelease];
}
// Set up the cell...
return cell;
}
which gives you:
"A style for a cell with a left-aligned label across the top and a left-aligned label below it in smaller gray text. The iPod application uses cells in this style."
Also every kind of UITableViewCell has an image-property by default.
but here are some tutorials for building custom cells:
Custom UITableViewCells with Interface Builder
http://iphone.zcentric.com/2008/08/05/custom-uitableviewcell/
You can create a cell in Interface Builder. Start with a UITableViewCell which acts like a view, and then add a UIImage, one or more labels, whatever containers to hold your symbols, etc.
Then in your cellForRowAtIndexPath, load the nib and fill in the picture and labels, etc.
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath {
static NSString *CellIdentifier = #"Cell";
MyTableCell *cell = (MyTableCell *) [tableView dequeueReusableCellWithIdentifier:CellIdentifier];
if (cell == nil) {
cell = myTableCell; // get the object from the outlet
myTableCell = nil; // make sure this can't be re-used accidentally
}
// Set up the cell...
cell.myViewController = self;
// set up image and labels here
return cell;
}