I followed Simon Lee's tutorial on animating uitableview height change, and it's working amazing! The only problem I seem to be facing is that I can tap several cells, and they all will remain expanded regardless if another is already expanded. I only want one expanded at any given time, and if another is already expanded, for it to be closed before a new one expands.
Simon mentioned that we should "store a single NSIndexPath as the current selected item instead on an array of indexes." I'm not exactly sure how to do this. If anyone could help out that would be awesome!
what you have to do is just add the code below in the tableView delegate method tableView:didSelectRowAtIndexPath: below the line
[selectedIndexes setObject:selectedIndex forKey:indexPath];
code to add
NSArray *key = selectedIndexes.allKeys;
for (int i = 0; i < [key count]; i++) {
if (![[key objectAtIndex:i] isEqual:indexPath]) {
[selectedIndexes setObject:[NSNumber numberWithBool:NO] forKey:[key objectAtIndex:i]];
}
}
Happy Coding :)
Enjoy the Day!!
Yes you can colapse the cells using the delegate methods of UITableView -(void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath and - (CGFloat)tableView:(UITableView *)tableView heightForRowAtIndexPath:(NSIndexPath *)indexPath :-
First declare the variable to get theindexPath
NSIndexPath *selectedCellIndexPath;
then get the cell's indexPath in didSelectRowAtIndexPath :-
-(void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath
{
selectedCellIndexPath=indexPath;
[tableView reloadRowsAtIndexPaths:[NSArray arrayWithObject:indexPath] withRowAnimation:UITableViewRowAnimationBottom];
}
Then do the collapsing and extending and set the lower and upper height:-
- (CGFloat)tableView:(UITableView *)tableView heightForRowAtIndexPath:(NSIndexPath *)indexPath
{
if(selectedCellIndexPath != nil
&& [selectedCellIndexPath compare:indexPath] == NSOrderedSame)
return yourCellsExtendedHeightInInteger;
return yourCellsCollapsedHeightInInteger;
}
or use
- (CGFloat)tableView:(UITableView *)tableView heightForRowAtIndexPath:(NSIndexPath *)indexPath
{
if(selectedCellIndexPath && indexPath.row == selectedCellIndexPath .row)
{
return 100;
}
return 44;
}
You can see this tutorial also:-
Related
I am using this Tutorial for developing application setting screen.The problem is i want to increase height of cell in setting screen.And I have not taken any table view i am doing that by using Root.plist file.i.e i want to increase height of Legal field in this Image (application setting screen not in table view of application)
First, you'll need to save the selected indexPath row:
- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath
{
self.selectedRowIndex = [indexPath retain];
[tableView beginUpdates];
[tableView endUpdates];
}
Then, when you have the currently selected index, you can tell the tableView that it should give that row more space.
- (CGFloat)tableView:(UITableView *)tableView heightForRowAtIndexPath:(NSIndexPath *)indexPath
{
//check if the index actually exists
if(selectedRowIndex && indexPath.row == selectedRowIndex.row)
{
return 100;
}
return 44;
}
This will return height 100 for the selected cell. You can also check this
Use this set row height in a UITableView
- (CGFloat)tableView:(UITableView *)tableView heightForRowAtIndexPath:(NSIndexPath *)indexPath {
// Return the height For Row.
return 100.0;
}
As it can be seen from your image the indexPath for which you need to increase the row height is section 1 and row 0:
- (CGFloat)tableView:(UITableView *)tableView heightForRowAtIndexPath:(NSIndexPath *)indexPath
{
NSIndexPath *indexValue = [NSIndexPath indexPathForRow:0 inSection:1];
if (indexValue == indexPath)
return 100.0;
else
return 44.0;
}
On the WWDC 11 video 'session 125 - UITableCiew Changes, Tips, Tricks' at 24:30+ Mr Luke Hiesterman is giving a demo which adds a cell to the table view when a cell is selected.
I want to add that functionality to my IOS application, but I can't figure out how to make it.
Some code is not shown in the demo-video. And there is no downloadable source of the demo.
Can anyone help me out?
EDIT:
I can add a new row below the selected row but it is an other custom cell.
(I have a list of contracts which you can accept)
- (CGFloat)tableView:(UITableView *)tableView heightForRowAtIndexPath:(NSIndexPath *)indexPath
{
return ((indexPath.row >= [_contracts count]) ? 40 : 60);
}
- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section
{
return [_contracts count] + ((_addedRow) ? 1 : 0);
}
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
NSString *reuseID = #"contract_cell";
ContractTableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:reuseID];
if(!cell)
{
// Load the top-level objects from the custom cell XIB.
NSArray *topLevelObjects = [[NSBundle mainBundle] loadNibNamed:#"ContractTableViewCell" owner:self options:nil];
// Grab a pointer to the first object (presumably the custom cell, as that's all the XIB should contain).
cell = [topLevelObjects objectAtIndex:0];
[cell setBackgroundView:[[UIImageView alloc] initWithImage:[UIImage imageNamed:#"contract_cell.png"]]];
}
NSLog(#"row?: %d", indexPath.row);
//I thought this would work... not.
if((indexPath.row >= [_contracts count]))
{
[cell.label setText:#"new"];
}
else
{
Contract *contract = [_contracts objectAtIndex:indexPath.row];
[cell.label setText:#"test"];
}
return cell;
}
- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath
{
if(!_addedRow)
{
_addedRow = YES;
[tableView deselectRowAtIndexPath:indexPath animated:NO];
[_tableView insertRowsAtIndexPaths:[NSArray arrayWithObject:[NSIndexPath indexPathForRow:indexPath.row+1 inSection:indexPath.section]] withRowAnimation:UITableViewRowAnimationAutomatic];
}
}
- (NSIndexPath *)tableView:(UITableView *)tableView willSelectRowAtIndexPath:(NSIndexPath *)indexPath
{
return [NSIndexPath indexPathForRow:indexPath.row+1 inSection:indexPath.section];
}
For example I press the first row. A row is added below the first one. But now the cellForRowAtIndexPath.. is called for row 2 (needs to be the new custom)
how can I check if it is a new one?
You need to remember which of your rows is selected to show the added row at the correct index. Currently you're always assuming that the added row is the very last one because you're configuring it in tableView:cellForRowAtIndexPath: only if the index is bigger than your number of contracts.
Say you have five contracts and the third one is selected. if((indexPath.row >= [_contracts count])) is only true for the last row but actually want this condition to be true for the fourth row, so it should be if (indexPath.row == selectedRowIndex + 1) (you need to store the selected row index in some instance variable).
This answer should help you out. It tells you how to put your UITableViewController into "update mode" and then lets you insert new rows (even with animation): UITextField in UITableViewCell - adding new cells
I want to add in my tableview the possibility to "swipe to delete", but I don't want this for the last cell of the table!
I can check in - (void)tableView:(UITableView *)tableView commitEditingStyle:(UITableViewCellEditingStyle)editingStyle forRowAtIndexPath:(NSIndexPath *)indexPath if the indexPath.row is the last one, but what I want is that if the user swipes on the last cell, nothing will appear (while in the others cells appears the text "delete").
I've tried this
-(NSString *)tableView:(UITableView *)tableView titleForDeleteConfirmationButtonForRowAtIndexPath:(NSIndexPath *)indexPath{
if (indexPath.row != ([array count]-1)) {
return #"delete";
}
else {
NSString *a;
return a;
}
}
but of course it doesn't works (the app crashes).
I've tried with
return #"";
but the red button appears (with no text)!
What do you suggest me?
Thanks!
Try
- (UITableViewCellEditingStyle)tableView:(UITableView *)tableView editingStyleForRowAtIndexPath:(NSIndexPath *)indexPath
{
if ([indexPath row] == [tableView numberOfRowsInSection:[indexPath section]] - 1)
{
return UITableViewCellEditingStyleNone;
}
return UITableViewCellEditingStyleDelete;
}
The app crashes since you return an uninitialized pointer. But even then, you're doing it wrong ;-)
You want to implement tableView:editingStyleForRowAtIndexPath: and return UITableViewCellEditingStyleDelete for all cells, except for the last. You need to return UITableViewCellEditingStyleNone for the last cell to prevent that it can be deleted.
-(BOOL)tableView:(UITableView *)tableView canMoveRowAtIndexPath:(NSIndexPath *)indexPath
{
NSUInteger row = [indexPath row];
if(row == 0)
return NO;
return YES;
}
My problem is: although i specified NO for row 0. If I attempt to drag row 1 to replace row 0, the animation lets this happen anyways. The problem is that the above method only decides whether or not there is a move icon on the right of the row. Any ideas on how to stop row 0 from ever getting replaced?
Use
- (NSIndexPath *)tableView:(UITableView *)tableView targetIndexPathForMoveFromRowAtIndexPath:(NSIndexPath *)sourceIndexPath toProposedIndexPath:(NSIndexPath *)proposedDestinationIndexPath
from the UITableViewDelegate.
You can do something like this:
if ([proposedDestinationIndexPath row] > 0) {
return proposedDestinationIndexPath;
}
NSIndexPath *betterIndexPath = [NSIndexPath indexPathForRow:1 inSection:0];
return betterIndexPath;
(From "iPhone Programming" by Joe Conway & Aaron Hillegass)
i am using below code for auto scrolling UITableview
- (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView {
return 1;
}
- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section
{
return [DataArray count];
}
- (CGFloat)tableView:(UITableView *)tableView heightForRowAtIndexPath:(NSIndexPath*)indexPath
{
return 60;
}
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath {
static NSString *identifier = #"CustomTableCell";
CustomTableCell *cell = (CustomTableCell *)[tableView dequeueReusableCellWithIdentifier:identifier];
if (cell == nil)
{
cell = [[[CustomTableCell alloc]initWithStyle:UITableViewCellStyleDefault reuseIdentifier:identifier] autorelease];
}
if(isAutoScrollEnabled)
[DataTable scrollToRowAtIndexPath:indexPath atScrollPosition:UITableViewScrollPositionTop animated:YES];
cell.Time.text = [[DataArray objectAtIndex:indexPath.row]objectForKey:#"CurrentTime"];
cell.SerialNo.text = [NSString stringWithFormat:#"%d",indexPath.row+1];
return cell;
}
But it fluctates my tableview every time i reload data in tableview. Is there any solution ?
Can anyone help me ?
Thanks in advance......
What do you want?
smooth scrolling to down?
or
scrolling to new cell position?
first case(smooth scrolling) should use NSTimer.
second case(to new cell position) should override UITableView[updateData]
I'm not sure exactly what you are saying. But I will say that calling scrollToRowAtIndexPath in your cellForRowAtIndexPath looks like it could cause problems. What you are doing is telling it to scroll each time it generates a cell. That doesn't look right.
I also have to wonder if you really want to be animating that scrolling.