i'm using a default style table (UITableViewCellStyleSubtitle)
i want to add more then one detailTextLabel in each row,
how can i customize it?
code:
UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier];
if (cell == nil)
{
cell = [[[UITableViewCell alloc] initWithStyle:UITableViewCellStyleSubtitle
reuseIdentifier:CellIdentifier] autorelease];
cell.selectionStyle = UITableViewCellSelectionStyleNone;
}
// Leave cells empty if there's no data yet
if (nodeCount > 0)
{
// Set up the cell...
ARecord *aRecord = [self.entries objectAtIndex:indexPath.row];
cell.textLabel.text = aRecord.lDate;
cell.detailTextLabel.text = aRecord.WNum;
// Only load cached images; defer new downloads until scrolling ends
//(!aRecord.appIcon) - use icon
if (!aRecord.appIcon)
{
if (self.tableView.dragging == NO && self.tableView.decelerating == NO)
{
[self startIconDownload:aRecord forIndexPath:indexPath];
}
// if a download is deferred or in progress, return a placeholder image
cell.imageView.image = [UIImage imageNamed:#"Placeholder.png"];
}
else
{
cell.imageView.image = aRecord.appIcon;
}
}
return cell;
}
The best way of doing this is to add a UILabel to the cell.contentView. You would do this when you initially create the cell. I've found two things to be especially helpful: to lay out the label on a table cell in a throwaway document in Interface Builder to determine the initial frame. It's also especially helpful to set the autoresizingMask so that the label will be resized appropriately when the cell is resized (due to autorotation, going into edit mode, etc.).
Finally, you'll need to set the table view's rowHeight to a higher value to accommodate the larger cells, otherwise you'll end up with overlapping cells.
Also, set a tag on your label to make it easy to retrieve with viewWithTag: when you go to update the text.
You could add the labels to cell.contentView.
Related
I am attempting to call a reloadData on my table's rows on a viewDidAppear method access. However, my cells are not refreshing their values and I cannot figure out why, as it seems everything is being accessed in the order it is suppose to. To make matters more odd, 1 row actually does refresh, but none of the others do.
Here is my code...
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
// Set up the cell...
static NSString *CellWithIdentifier = #"Cell";
UITableViewCell *cell = (UITableViewCell *)[tableView dequeueReusableCellWithIdentifier:CellWithIdentifier];
NSLog(#"generating cell contents");
if (cell == nil)
{
cell = [[UITableViewCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:CellWithIdentifier];
cell.accessoryType = UITableViewCellAccessoryDisclosureIndicator;
cell.textLabel.text = [_tableGroup.options objectAtIndex:rowcount];
rowcount++;
//label for currently selected/saved setting
_currentSetting = [[UILabel alloc] initWithFrame:CGRectMake(160, 8, 115, 25)];
[_currentSetting setFont:[UIFont systemFontOfSize:14]];
_currentSetting.backgroundColor = [UIColor clearColor];
_currentSetting.textColor = [UIColor blueColor];
_currentSetting.textAlignment = NSTextAlignmentRight;
[cell.contentView addSubview:_currentSetting];
NSLog(#"added new label to cell");
}
//depending on the setting, set the label in the cell to what is currently selected
if (indexPath.section == 1 && indexPath.row == 0) {
_currentSetting.text = [NSString stringWithFormat:#"%# %#",[settings.mapDistance stringValue], NSLocalizedString(#"MILES_IDENTIFIER", nil)];
NSLog(#"setting map distance label: %#", settings.mapDistance);
}
else if(indexPath.section == 1 && indexPath.row == 1)
{
_currentSetting.text = [NSString stringWithFormat:#"%# %#",[settings.maxCustomers stringValue], NSLocalizedString(#"ITEMS_IDENTIFIER", nil)];
NSLog(#"setting max customers: %#", settings.maxCustomers);
}
else if(indexPath.section == 2)
{
_currentSetting.text = [NSString stringWithFormat:#"%# %#",[settings.maxProducts stringValue], NSLocalizedString(#"ITEMS_IDENTIFIER", nil)];
NSLog(#"setting max products: %#", settings.maxProducts);
}
return cell;
}
based on this code, i get this output with my NSLOGS.
this is the first run of the cells when the view is created. It generates 4 cells, puts labels in each cell, and in 3 of those labels, puts in a value.
generating cell contents
added new label to cell
generating cell contents
added new label to cell
setting map distance: 15
generating cell contents
added new label to cell
setting max customers: 250
generating cell contents
added new label to cell
setting max products: 150
at this point i have clicked a row, went to a different screen, and have now returned. as you can see, map distance is different. although no change is displayed, even though the code to change the label's text is accessed during the reload process.
reloading data
generating cell contents
generating cell contents
setting map distance: 25
generating cell contents
setting max customers: 250
generating cell contents
setting max products: 150
again, I'm at a loss because the last row DOES refresh correctly. But none of the others do.
Thanks
When you reload your tableView, the cells already exist and are dequeued from the tableView, so the condition if (cell == nil) returns false, and the cell creation code is not executed.
In that cell creation code, you are assigning a value to _currentSetting and then proceed with the acode assuming that value is correct. However, when the cell creation code is not executed, that value points to the latest created cell, and thus, it won't update.
To fix this: make _currentSetting a local variable and change the code to look like this:
(You don't really need to make it a local variable, but it's more appropriate because you don't really need a reference to the last label you created after you leave this method)
UILabel *_currentSetting = nil;
if (cell == nil) {
_currentSetting = ...
_currentSetting.tag = 123;
}
else
_currentSetting = [cell.contentView viewWithTag:123];
...
The problem here is that the second time (when you are reloading the view ) the _currentSetting is not having a valid memory .So it is better to implement a custom cell and do the job
Better refer this an excellent guide
The second time around, you can see that "added new label to cell" isn't being called, so you're re-using an old tableViewCell.
Note that you're not setting _currentSetting when re-using a cell, only when creating a new cell. So _currentSetting is set to the last new cell that was created, most likely the last cell in the table.
You need to make sure to set _currentSetting to the correct label (maybe by using viewWithTag: or something similar).
(e:f;b)
I have a table view. I have created a method that takes all the data it needs with a cell and returns the updated cell. In that method I have:
my cell for row goes like this
static NSString *CellIdentifier = #"Cell";
UITableViewCell *cell = [tableView
dequeueReusableCellWithIdentifier:CellIdentifier];
cell = myCellcreationMethod : cell : reuseIdentifier: other arguments;
MycellCreation method goes like this:
MycellCreation with args some strings , the cell and the reuseIdentifier.
if ( cell == nil ) {
cell = [[UITableViewCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:reuseIdentifier];
//Here code that creates a custom image view something like:
thumbnailView = [[UIImageView alloc] initWithFrame:CGRectMake(9, 9, 70, 70)];
thumbnailView = [imUtil getImageViewWithRoundedCorners:thumbnailView andRadius:10.0];
thumbnailView.contentMode = UIViewContentModeScaleAspectFit;
[cell.contentView addSubview:thumbnailView];
//same here for another image view,
//same again
//and there same for a UILabel
}
//Here I set in each case the data for each imageView from above and the UIlabel text like
UIImage *thumbnailImage = [imUtil getThumbnailImageWithFile:thumbnail];
thumbnailView.image = thumbnailImage;
//the others go here
textLabel.text = #"something";
return cell;
All cells have the same identifier since they all are of the same type. But when I scroll down, instead of showing the data that corresponds to the next object in my list (new thumbnail new image, new text in uilabel) it replicates the first ones. I guess it loads the reused cell but does not put the new data in.
Any suggestions please?
I found the answer. I shouldn't just add the views with a method in my tableview class. I created a NEW subclass of UITableView, initialized it with my custom views and created a method in there that sets the new data. then used them two and it works like a charm!
This is related to another question of mine which wasn't answered in a helpful way (message when a UITableView is empty).
I'm trying to show an UIImage graphic that says You haven't saved any bookmarks over an UITableView when it's empty. I have NSNotification set-up so that when bookmarks are added or deleted, a message is sent so that the UITableView can be updated.
I've been trying to do it with this code. Why won't this work?
- (void)bookmarksChanged:(NSNotification*)notification
{
[self.tableView reloadData];
UIImageView* emptyBookmarks = [[UIImageView alloc] initWithFrame:CGRectMake(75, 100, 160, 57)];
emptyBookmarks.alpha = 1;
emptyBookmarks.image = [UIImage imageNamed:#"emptyBookmark.png"];
[self.view addSubview:emptyBookmarks];
[emptyBookmarks release];
if ([self.dataModel bookmarksCount] == 0)
{
emptyBookmarks.alpha = 1;
}
else
{
emptyBookmarks.alpha = 0;
}
}
I'm probably approaching this the wrong way... But if salvageable, what am I doing wrong?
When I initially have an empty bookmarks tableview, there's no image displayed. After I add a bookmark and then delete it, the image shows. Grrh.
Another way (and IMO the correct way) to do this is to manipulate the backgroundView property on the UITableView.
While making a single cell with a custom image cell would certainly works, I think it overly complicates the logic of your UITableViewController's data source. It feels like a kludge.
According to UITableView documentation:
A table view’s background view is automatically resized to match the
size of the table view. This view is placed as a subview of the table
view behind all cells , header views, and footer views.
Assigning an opaque view to this property obscures the background color
set on the table view itself.
While you probably don't want to just set it to your UIImageView, it is very easy to make a UIView that contains the UIImageView that you want.
Well first off if you were going to do it that way, you would need to reload the tableView after updating the image or model etc. and not before.
But you are probably making things more complicated than they need to be!
Why not just check to see if the data for section 0 and indexPath.row 0 are empty and if so in cellForRowAtIndexPath display a text message accordingly.
// First make sure there is always one row returned even if the dataModel is empty.
-(NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section
{
NSInteger numRows = 0;
if ([self.dataModel lastObject]) {
// Return the number of rows in the section.
numRows = [self.dataModel count]; // etc.
}
if (numRows < 1) numRows = 1;
return numRows;
}
// Then display the data if there is some, otherwise a message if empty.
-(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];
}
if ([self.dataModel lastObject]) {
// setup the cell the normal way here.
} else { // the datasource is empty - print a message
cell.textLabel.text = nil;
cell.detailTextLabel.text = NSLocalizedString(#"You haven't saved any bookmarks", #"");
cell.detailTextLabel.textColor = [UIColor colorWithRed:0/255.0 green:0/255.0 blue:0/255.0 alpha:0.7];
cell.accessoryType = UITableViewCellAccessoryNone;
}
return cell;
}
Are you sure [self.dataModel bookmarksCount] is equal to 0 ?
While I agree that you are probably going about this the wrong way,
your image is allocated and added in your bookmark changed, your notification does not trigger when there are no bookmarks initially. Hence you don't see the image. Call the bookmar changed when your table view inits or appears.
Probably the best way to achieve this is to perform a check in your numberOfRowsInSection method to return 1 if your data source is empty. Then in cellForRowAtIndexPath check if your data source is empty and if it is, create a custom cell that contains whatever you want. In heightForRowAtIndexPath you need to return your custom cell height if your datasource is empty, but only if you want the cell larger than the default. At least that is how I would approach it.
when bookmarks count is nil add one to your row method:
- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section{
int c;
c = bookmarks.count;
if(c == 0){
c = 1;
}
return c;
}
and then the same check again in your cellforrowatindexpath.
Another thing to be aware of in this situation is that if you're using core data and you're datasource is feeding off an entity, you will want to make sure your model matches. You can get some weird side-effect behavior in certain situations. This is especially true if you allow editing and core data has an empty model but you're tableview is still showing a cell.
i want to customize table cell to show data like this (chk image)
For those rows which you want set color like above the simply set this color (shown in above pic) fo cell' background color.
or find this color use digital meter and use that rgb. like this
[UIColor colorWithRed:200.0/255 green:200.0/255 blue:200.0/255 alpha:1.0];
replace 200.0 with your rgb values
waht you need, you need to store data in common array for simply showing single detail you need to save that in form of string others in dictionary format.
And at time of showing data.
check wheter object is string or dictionary, and show accordingly.
for checking type of object use this
if([[myArray objectAtIndex:index] isKindOfClass:[NSString class]])
You can implement delegate method of viewForHeaderInSection: and implement view for yellow area shown in screenshot, and for for rest, you can implement custom table view cell inherited from UITableViewCell
You can subclass UITableViewCell.
In Xcode -> New File -> Objective-C class -> Subclass of UITableViewCell
Then in your tableview at cellForRowAtIndexPath:
static NSString *CellIdentifier = #"Cell";
MySubclassedTableviewCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier];
if (cell == nil) {
cell = [[[MySubclassedTableviewCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:CellIdentifier] autorelease];
}
// Configure the cell...
return cell;
Use custom tableviewcell
I have a UILabel that I create a radius on the layer, using cornerRadius. The ultimate goal is to make the label look like Apple does in the mail app.
It looks great at first, but once you drill down into that row and back a few times, the quality of the rounded edge starts to degrade. You can see in the screen shot, the left side is blocky.
Why would this be happening? It seems to happen after about 2 times of loading that view.
(source: puc.edu)
Here is my cell creation method:
- (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];
}
Trip *trip = [fetchedResultsController objectAtIndexPath:indexPath];
cell.textLabel.text = trip.title;
cell.detailTextLabel.text = #"Date of trip";
cell.accessoryType = UITableViewCellAccessoryDisclosureIndicator;
// Create a nice number, like mail uses
UILabel *count = [[UILabel alloc] initWithFrame:CGRectMake(cell.contentView.frame.size.width - 50, 12, 34, 20)];
[count setText:[NSString stringWithFormat:#"%i",[[trip.rides allObjects] count]]];
[count setFont:[UIFont fontWithName:#"Helvetica-Bold" size:16]];
count.textAlignment = UITextAlignmentCenter;
count.backgroundColor = [UIColor grayColor];
count.textColor = [UIColor whiteColor];
count.layer.cornerRadius = 10;
[cell addSubview:count];
[count release];
return cell;
}
In every call to cellForRowAtIndexPath, you are creating a new count UILabel. Eventually there will be several overlapping views in the same place with the same antialiased curve, so it will look blocky.
Try creating the count UILabel only when a new cell is created, in the if (cell == nil) block. Otherwise, get the count label by tag.
if ( cell == nil ) {
cell = ...
count = ...
...
count.tag = 'coun';
[cell.contentView addSubview:count];
[count release];
} else {
count = (UILabel *)[cell viewWithTag:'coun'];
}
[count setText:[NSString stringWithFormat:#"%i",[[trip.rides allObjects] count]]];
Check to see if the tableview/cell is set to clear its context before drawing. I noticed I had similar issues with text on the cell.
I've seen some strange issues wherein it looks like Core Animation based properties are accumulative even though they shouldn't be. Your problem here might be caused by some kind of accumulative creep from changing the value of the corner radius repeatedly every time the cell is returned.
I would suggest testing if the corner radius already equals 10 before setting it again. (Although I would expect that to show up more with scrolling up and down than in reloading the view.)
Another possible problem would be that some subview is migrating causing a visual artifact.
Edit:
Instead of adding the label to the cell itself. Try adding it as a subview of the cell's content view.