UITableViewSection Row Indices - ios

I have a UITableView with three sections (Friday, Saturday, Sunday) each with different data and a different number of rows. When selected, the selected row expands, but so do the rows in the other two sections with the same index. I only want the single selected row to expand.
Is there a way to also get the the section in my didSelectRowAtIndexPath method, and to use that in my heightForRowAtIndexPath method in order to keep all of the other rows at their unexpanded size?
The methods below are both in my UITableView subclass:
- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath {
//[tableView cellForRowAtIndexPath:indexPath].accessoryType = UITableViewCellAccessoryCheckmark;
customCell *cell = [tableView cellForRowAtIndexPath:indexPath];
//Close row if tapped a second time
if(self.currentSelection == indexPath.row) {
self.currentSelection = -1;
}
//Otherwise, expand row
else {
self.currentSelection = indexPath.row;
}
- (CGFloat)tableView:(UITableView *)tableView heightForRowAtIndexPath:(NSIndexPath *)indexPath {
int rowHeight;
if ([indexPath row] == self.currentSelection) {
rowHeight = 185;
} else rowHeight = 44;
return rowHeight;
}

Check NSIndexPath. This object contains section as property.

Save the index path as your selection instead of just the row. At the moment you are saving, say, row 2, and each section has a row 2, so that row is expanding in all sections.
You can compare index paths as follows:
if([indexPath1 isEqual:indexPath2])
// Do your thing
Better yet, UITableView has an indexPathForSelectedRow property, so you don't even need your own variable to keep track of this:
- (CGFloat)tableView:(UITableView *)tableView heightForRowAtIndexPath:(NSIndexPath *)indexPath {
int rowHeight;
if ([indexPath isEqual:tableView.indexPathForSelectedRow]) {
rowHeight = 185;
} else rowHeight = 44;
return rowHeight;
}

Related

Using Multiple UITableViewCells for one tableView

I am unsure if I'm setting up the UITableView the right way when using multiple custom cell views. I seem to have my table working however, i think the reuse of cells makes the first cells you see once you load the view the same size as the very first cell which should be the only cell thats double in size. Once I scroll passed them and back up they go to the size thats set for them.
Is there a right way of doing this? I've looked through other forms and tried their ways but this is the closed I've gotten it to work with just that one flaw.
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
static NSString *CellIdentifier1 = #"profileCell";
static NSString *CellIdentifier2 = #"profileCells";
if (indexPath.section == 0) {
PFProfileTableCellView * cell = (PFProfileTableCellView *)[tableView dequeueReusableCellWithIdentifier:CellIdentifier1];
//only one row in this section
return cell;
} else{
PFWallPostTableViewCell * cell = (PFWallPostTableViewCell *)[tableView dequeueReusableCellWithIdentifier:CellIdentifier2];
return cell;
}
}
Use this UITableView delegate method - (CGFloat)tableView:(UITableView *)tableView heightForRowAtIndexPath:(NSIndexPath *)indexPath; and return row height according to the sections of your tableview like the example below
- (CGFloat)tableView:(UITableView *)tableView heightForRowAtIndexPath:(NSIndexPath *)indexPath {
if (indexPath.section == 0) {
return 100.0;
}
return 50.0;
}

UITableView - Controlling or preventing the delete for a specific row in a section

I am trying to prevent the delete for every last row in every section of my UITableView control. I wrote the code which is working so far.
Is there a way to prevent the delete button from appearing for a specific row in a specific section when in edit mode of UITableView?
Here is the code :
- (void) tableView:(UITableView *)tableView commitEditingStyle:(UITableViewCellEditingStyle)editingStyle forRowAtIndexPath:(NSIndexPath *)indexPath {
NSInteger section = indexPath.section;
NSInteger row = indexPath.row;
// If table view is asking to commit a delete command...
if ( editingStyle == UITableViewCellEditingStyleDelete) {
// Prevent deleting the last row
int length = [[[MyItemStore sharedStore] getItemsForGivenSection:section] count];
// PREVENT LAST ROW FROM DELETING
if ( row == length) {
return;
}
NSArray *items = [[MyItemStore sharedStore] getItemsForGivenSection:section];
MyItem *item = items[row];
[[MyItemStore sharedStore] removeItemFromSection:item fromSection:section];
//Also remove that row from Table view with animation
[tableView deleteRowsAtIndexPaths: #[indexPath] withRowAnimation:UITableViewRowAnimationFade];
}
}
You could use something like this:
-(BOOL)tableView:(UITableView *)tableView canEditRowAtIndexPath:(NSIndexPath *)indexPath {
//Return FALSE for the last row
if (indexPath.row == [tableView numberOfRowsInSection:indexPath.section] - 1)
return FALSE;
}
//Return TRUE for all other rows
return TRUE;
}
You can do this but tableView:commitEditingStyle:forRowAtIndexPath is too late as this gets called when the user already triggered the deletion. You can either return UITableViewCellEditingStyleNone from tableView:editingStyleForRowAtIndexPath: or set the editingStyle property of the UITableViewCell. Sounds like you want to go with the former and return none if it's the last row in each section.
You can use this code in the Table View Controller:
- (UITableViewCellEditingStyle)tableView:(UITableView *)tableView
editingStyleForRowAtIndexPath:(NSIndexPath *)indexPath
{
if (indexPath.row == [tableView numberOfRowsInSection:indexPath.section] - 1)
return UITableViewCellEditingStyleNone;
}
return UITableViewCellEditingStyleDelete;
}

Complex UITableView with Prototype Cells, Sections

I'm looking for the best possible solution for a complex UITableView. What I want : I have an arbitrary number of sections. In this section is just one static cell and then should come any number of dynamic cells.
My Data are stored in some NSMutableArray and i tried somethink like this:
Combine static and prototype content in a table view
But i dont know how to handle it with my kind of problem.
So can somebody give me a hint or a best practice?
UPDATE: 1
http://jsfiddle.net/konstheinrich188/HKkA8/ Fiddle shows how my data looks and what im trying todo
This pic shows how i want to code my tableview...
When you are using the term "static", are you really talking about a "uitableview static cell", or rather "cell with static content"?
If the former; why do you need that?
If the latter; how about testing in each section whether this is the first cell in the section, and then presenting static content? For all other cells, display dynamic content:
if (indexPath.row == 0) {
// First row in section. Display static content
...
} else {
// Display dynamic content
...
}
For what purpose do you need the static cells?
So after a while and some testing and listen to your ideas and technicals i solved my problem!
Here is a little code :
- (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView
{
return [mappedSprints count];
}
- (NSString *)tableView:(UITableView *)tableView titleForHeaderInSection:(NSInteger)section
{
UISprint*s = [mappedSprints objectAtIndex:section];
return s._name;
}
- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section
{
UISprint* s = [mappedSprints objectAtIndex:section];
return [s.internalUserStorey count] + [s.externalUserStorey count] + 1;
}
- (CGFloat)tableView:(UITableView *)tableView heightForRowAtIndexPath:(NSIndexPath *)indexPath
{
if (indexPath.row == 0) {
return 130;
}
return 80;
}
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath{
UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:[NSString stringWithFormat:#"Cell%d%d", indexPath.row, indexPath.section]];
if (cell == nil) {
cell = [[UITableViewCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:[NSString stringWithFormat:#"Cell%d%d", indexPath.row, indexPath.section]];
}
UISprint*s = [mappedSprints objectAtIndex:indexPath.section];
if (indexPath.row == 0) {
//Here is my first cell
//cell.textLabel.text =s._name;
}
else if(indexPath.row >= 0 && indexPath.row<=[s.internalUserStorey count]){
//here are the cells for SubItem
}
else if(indexPath.row >= [s.internalUserStorey count]){
//here are the cells for SubItem 2
}
return cell;
So thanks to all !!
Best Konstantin
You can take one NSMuatableArray and add references on that i.e.
NSMuatableArray *arr=[NSMuatableArray alloc]init];
//section no 1
[arr addObject:#"2"];
//section no 2
[arr addObject:#"1"];
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath{
switch(arr objectAtIndex[indexPath.row])
{
}
}
you can use this way by using references you want set cells.

UITableView Cells With DIfferent Format & Behavior in Same Table Section

I have a UITableView with one section. All of the cells in that one section have cells that are derived from a subclass of UITableViewCell called PLContactCell.
What I'd like to do is, for the very last row of the table only, not use a PLContactCell. I just want to use a normal UITableViewCell that I can format however I would like. I'd also like to be able to have this cell NOT respond to being tapped.
My initial cellForRowAtIndexPath method is:
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath {
PLContactCell *cell = [tableView dequeueReusableCellWithIdentifier:[PLContactCell reuseIdentifier]];
if (!cell) {
cell = [PLContactCell reusableCell];
cell.delegate = self;
}
id modelObject = [[sections objectAtIndex:indexPath.section] objectAtIndex:indexPath.row];
if ([modelObject isKindOfClass:[NSString class]]) {
[cell configureWithString:modelObject];
} else {
[cell configureWithUser:modelObject];
}
return cell;
}
EDIT
So I tried created a UITableView cell in the XIB file and added the reuse identifier of "newCell" to it. Then I added this code:
if (indexPath.row == [[sections objectAtIndex:indexPath.section] count] - 1) {
NSString *CellIdentifier = #"newCell";
noFormatCell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier];
}
This doesn't do anything. My question is, how do I access the last row of the section and how do I make it so that that cell it is not a PLContactCell but a UITableView Cell.
If it's always at the end, you might consider using the footer view of the UITableView. You can then keep some extra logic out of your UITableViewDataSource.
If it HAS to be as a cell, you'd have to add an extra row count on your last section, then do an if statement check to watch out for it in your -tableView:cellForRowAtIndexPath: implementation. I would strongly urge you try the footer approach, as it's cleaner and way easier to figure out what you were doing a few months/years from now.
Here's some code. Note you'd need to make another section if you are using grouped style in the UITableView.
- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section
{
if (section == sections.count - 1) //Looking for last section
{
return [sections objectAtIndex:section].count + 1; //Add one to the last section
}
return [sections objectAtIndex:section].count;
}
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath {
NSInteger row = indexPath.row;
if ((sections.count == indexPath.section) && [sections objectAtIndex:indexPath.section].count == indexPath.row)
{
//Here you would create and return your UITableViewCell
}
PLContactCell *cell = [tableView dequeueReusableCellWithIdentifier:[PLContactCell reuseIdentifier]];
if (!cell) {
cell = [PLContactCell reusableCell];
cell.delegate = self;
}
id modelObject = [[sections objectAtIndex:indexPath.section] objectAtIndex:indexPath.row];
if ([modelObject isKindOfClass:[NSString class]]) {
[cell configureWithString:modelObject];
} else {
[cell configureWithUser:modelObject];
}
return cell;
}

can we change the height of current row in UITableView?

A very simple question...
can we change the height of only current row(the row which is clicked) in UItableView?
Note: I dont want any affect on size of remaining rows.
Yes you can. You need a variable that keeps the last selected row. For ex.:
#property (nonatomic, assign) NSInteger selectedRow;
...
Then implement the method
-(CGFloat)tableView:(UITableView *)tableView heightForRowAtIndexPath:(NSIndexPath *)indexPath {
if(indexPath.row == self.selectedRow) {
return 100.;
}
return 44.;
}
and then, update the method:
-(void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath {
[tableView deselectRowAtIndexPath:indexPath animated:YES];
if(self.selectedRow == indexPath.row)
self.selectedRow = -1;
else
self.selectedRow = indexPath.row;
//The magic that will call height for row and animate the change in the height
[tableView beginUpdates];
[tableView endUpdates];
}
NOTE: Initialise your self.selectedRow with -1 value in the beginning as the default is 0.
You can use heightForRowAtIndexPath for setting height for a row
- (CGFloat)tableView:(UITableView *)tableView heightForRowAtIndexPath:(NSIndexPath *)indexPath
You can place a check for NSIndexPath and return height for that particular indexpath
-(CGFloat)tableView:(UITableView *)tableView heightForRowAtIndexPath:(NSIndexPath *)indexPath {
if(indexPath.row == rowtochangeheight) {
return 60;
}
else
{
return 44;
}
}
Yes you can do, But you need to save indexpath of selected row and you must intialize selectedRow variable by negative value.
- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath
{
selectedRow = indexpath.row;
[tblView reloadData];
}
- (float)tableView:(UITableView *)tableView heightForRowAtIndexPath:(NSIndexPath *)indexPath
{
if (indexPath.row == selectedRow)
return 150.0f;
return 30;
}

Resources