I am trying to create accordion tableview. here I can get easily parent tableview selected cell index path values but I cant get subtable (Expandable child tableview cell) row index path. Please give me any solution for my issue and find below code
My Code :
// #optional
- (void)didSelectRowAtChildIndex:(NSInteger)childIndex underParentIndex:(NSInteger)parentIndex {
NSIndexPath * indexPath = [NSIndexPath indexPathForRow:[self rowForParentIndex:parentIndex] inSection:0];
UITableViewCell *selectedCell = [self cellForRowAtIndexPath:indexPath];
if ([selectedCell isKindOfClass:[ParentTableViewCell class]]) {
//ParentTableViewCell * pCell = (ParentTableViewCell *)selectedCell;
// Insert code here to detect and handle child cell selection
// ...
}
}
I am checking by open source code : https://github.com/ajkoshy7/SubTable
Get indexpath of selected Child from childIndex:
NSIndexPath * indexPath = [NSIndexPath indexPathForRow:[self rowForParentIndex:parentIndex] inSection:0];
NSIndexPath * indexPathChild = [NSIndexPath indexPathForRow:[self rowForParentIndex:childIndex] inSection:indexPath.row];
Related
I have a UITableView with custom UITableViewCell and datasource.
My tableviewdelegate class is registered to callback on on an event and once I got the event, I am reloading the data on the tableview.
The call back comes after I edit the tableviewcell data. But once the callback came, when I reloaddata, the tableview is scrolling to the top; and not staying at the current selection.
So I have cached the current selected cell and trying to scrollToRowAtIndexPath.
But I am hitting a crash.
How can I scroll to that row after tabledata is loaded ?
{
[m_tableView reloadData];
if(m_currentEditingCell != nullptr)
{
[m_tableView scrollToRowAtIndexPath:m_currentEditingCell atScrollPosition:UITableViewScrollPositionNone animated:YES];
}
}
You should provide NSIndexPath instead of providing your tableviewcell as argument for the selector scrollToRowAtIndexPath:atScrollPosition: animated:
NSIndexPath *indexPath = [NSIndexPath indexPathForRow:0 inSection:0];
[yourTableView scrollToRowAtIndexPath:indexPath
atScrollPosition:UITableViewScrollPositionTop
animated:YES];
The following code is able to select the cell after reload.
{
[m_tableView reloadData]; dispatch_async(dispatch_get_main_queue(), ^{ NSIndexPath* indexPath = [NSIndexPath indexPathForRow: ([m_tableView numberOfRowsInSection:([m_tableView numberOfSections]-1)]-1) inSection:([m_tableView numberOfSections]-1)]; if(m_currentCell != nullptr ) [self selectCurrentCell:m_currentCell];
}
}
I am trying to execute an IBAction when a long-press is performed on a cell in a UITableView. The action involves the content of the cell so I need to get the indexPath in order to retrieve the content from a dictionary in local storage. The IBAction method is defined in the MasterViewController.m file which contains the UITableView methods and is subclassed from UITableViewController. I have tried all of the following, and they all return null instead of the indexPath for the cell.
UITableViewCell *cell = (UITableViewCell *)self;
NSIndexPath *indexPath = [self.tableView indexPathForCell:cell];
NSIndexPath *indexPath = [self.tableView indexPathForCell:sender];
NSIndexPath *indexPath = [self.tableView indexPathForSelectedRow];
I have also seen a few years-old answers to similar questions that use the position of the cell in the view, but I can't get any of those to work either.
UPDATE:
The IBAction, sendToPB, is being defined in a subclass of UITableViewController. There is a long-press gesture recognizer added to the cell in Interface Builder, with Sent Actions connected to sendToPB. The action is supposed to be copying the content of the cell to the clipboard when you long-press on the cell in the table view. All the ways I have tried so far return null for indexPath.
- (IBAction)sendToPB:(id)sender {
NSIndexPath *indexPath = [self.tableView indexPathForCell:sender];
NSString *object = self.objects[indexPath.row];
UIPasteboard *pb = [UIPasteboard generalPasteboard];
NSString *pressedCellText = [[Data getAllNotes] objectForKey:object];
[pb setString: pressedCellText];
}
UPDATE:
I have found two problems with this approach. First, the long-press gesture doesn't actually select the row, which is why all of the options that used indexPathForSelectedRow don't work. Second, sender is the gesture recognizer, and not the cell or row, so using sender also produces a null value for indexPath. With these two factors in mind, how else can you detect which cell you performed the long-press on?
You can get indexPath Like This on longPressGesture!
-(void)handleLongPress:(UILongPressGestureRecognizer *)gestureRecognizer
{
CGPoint p = [gestureRecognizer locationInView:self.myTableView];
NSIndexPath *indexPath = [self.myTableView indexPathForRowAtPoint:p];
if (indexPath == nil) {
NSLog(#"long press on table view but not on a row");
}
else if (gestureRecognizer.state == UIGestureRecognizerStateBegan)
{
NSLog(#"long press on table view at row %d", indexPath.row);
}
else
{
NSLog(#"gestureRecognizer.state = %d", gestureRecognizer.state);
}
}
may Be this Link will help you a little more
Declare variable 1st in .h file as
NSIndexPath *hitIndex;
then on long press method u can get the position of cell & hence indexpath
(void)longPressMethod:(UIButton *)btn
{
CGPoint hitPoint = [btn convertPoint:CGPointZero toView:tbl_traits];
hitIndex = [tbl_traits indexPathForRowAtPoint:hitPoint];
}
You can do it using Gesture Recognizers. Hope these snippets help.......
In your .h file
#interface yourClass ()
{
UILongPressGestureRecognizer *longPressRecognizer;
}
In viewDidLoad,
longPressRecognizer = [[UILongPressGestureRecognizer alloc] initWithTarget:self action:#selector(longPressDetected:)];
longPressRecognizer.minimumPressDuration = 2;
longPressRecognizer.numberOfTouchesRequired = 1;
longPressRecognizer.delegate = self;
In cellForRowAtIndexPath, just before return statement
[cell addGestureRecognizer:longPressRecognizer];
And at the end,
- (void) longPressDetected:(UILongPressGestureRecognizer *)recognizer
{
UITableViewCell *selectedCell = (UITableViewCell *)recognizer.view;
// Your required code here
}
Edit: Thanks to #RegularExpression
First be sure to set the delegate of your tableView
self.myTableView.delegate = self
I believe this is what you are looking for:
Swift
func tableView(tableView: UITableView, didSelectRowAtIndexPath indexPath: NSIndexPath) {
//save the indexPath.row as an integer inside a property or pass it to your action
}
You can then save the index of from the above method or simple call your action passing that index inside the above method.
Objective-C
- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath{
//save the indexPath.row as an integer inside a property or pass it to your action
}
If this is inside a UITableViewController subclass, then casting self (which is an instance of the UITableViewController subclass) to UITableViewCell will not return the cell selected.
There is really 2 ways of doing this:
1- The easy way: Don't use an IBAction and just implement the delegate methods:
- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath
2- The relatively easy way: in your IBaction, you can get the selected cell by using the property:
self.tableview.indexPathForSelectedRow
This property will give you the indexpath of the selected cell.
If you attached the UILongPressGestureRecognizer to the cell by calling cell.addGestureRegognizer(_: _: _:) you should retrieve the cell from the sender by doing
let touchedView = sender.view as! UITableViewCell
Anyway, the best way to achieve this usually is by inspecting the dataSource instead of calling the UITableViewDataSource methods
You could subclass UITableViewCell and add an IVar for the index path and set that when cellForRowAtIndexPath is called for the UITableView dataSource protocol.
I am a new IOS Programmer, and i am having a issue.
I have a UITableView with 2 sections, one then is static, and another one is dynamical.
In specific actions i need to add new rows for the second section in runtime..
I know how to manage a UITableView , but not a specific section
Could you help me please?
Best Regards you all
You can use insertRowsAtIndexPaths: method of UITableView
//Update data source with the object that you need to add
[tableDataSource addObject:newObject];
NSInteger row = //specify a row where you need to add new row
NSInteger section = //specify the section where the new row to be added,
//section = 1 here since you need to add row at second section
NSIndexPath *indexPath = [NSIndexPath indexPathForRow:row inSection:section];
[self.tableView beginUpdates];
[self.tableView insertRowsAtIndexPaths:#[indexPath] withRowAnimation:UITableViewRowAnimationRight];
[self.tableView endUpdates];
You can use the same method insertRowAtIndexPath like
// Add the items into your datasource object first. Other wise you will end up with error
// Manage the number of items in section. Then do
NSIndexPath *indexPath1 = [NSIndexPath indexPathForRow:0 inSection:1];
NSIndexPath *indexPath2 = [NSIndexPath indexPathForRow:1 inSection:1];
[self.tableView insertRowsAtIndexPaths:#[indexPath1,indexPath2] withRowAnimation:UITableViewRowAnimationTop];
This will insert two rows to the section1. Remember before doing this you have manage your datasource object.
Swift 3 version
// Adding new item to your data source
dataSource.append(item)
// Appending new item to table view
yourTableView.beginUpdates()
// Creating indexpath for the new item
let indexPath = IndexPath(row: dataSource.count - 1, section: yourSection)
// Inserting new row, automatic will let iOS to use appropriate animation
yourTableView.insertRows(at: [indexPath], with: .automatic)
yourTableView.endUpdates()
you can do this by using scrolltoinfinite method but before that u have to import 3rd party svpulltorefresh
[self.tableViewMixedFeed addInfiniteScrollingWithActionHandler:^{
CGFloat height = self.tableViewMixedFeed.frame.size.height;
CGFloat contentYoffset = self.tableViewMixedFeed.contentOffset.y;
CGFloat distanceFromBottom = self.tableViewMixedFeed.contentSize.height - contentYoffset;
if(distanceFromBottom<contentYoffSet)
{
[weak insertRowAtBottom];
}
}];
-(void)insertRowAtBottom
{
[self.tableViewMixedFeed beginUpdates];
[self.tableViewMixedFeed insertRowsAtIndexPaths:indexPaths1 withRowAnimation:UITableViewRowAnimationTop];
[self.tableViewMixedFeed endUpdates];
[self.tableViewMixedFeed.infiniteScrollingView stopAnimating];
}
here indexpaths1 is the array of indexpaths of next cells which u want to insert in a table .
try using loop to get the next set of arrays and store them into indexpaths1.
[self.tableView insertRowsAtIndexPaths:#[indexPath1,indexPath2] withRowAnimation:UITableViewRowAnimationTop];
USE THIS METHOD..
I am using [tableview reloadData]; to reload the data in my UItableView, however when I use this I loose my highlight on my UItableVewCell.
I would like to know the best way to reinstate this highlight.
I set a tempIndexPath when the user selects the cell they edit the information then I call reloadData, then inside cellForRowAtIndexPath I use this code to re-highlight the cell however its not working.
if ([tempIndexPath isEqual:indexPath]) {
cell.selected = YES;
}
This code keeps the highlighted selection, and is safe with resorting/inserts/repositioning since it keeps a reference to the underlying object from the model, instead of the index path. It also scrolls to the selection, which is helpful when the updated model causes the selection to be moved out of the current scroll position's frame.
- (void) tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath
{
//Save the selected object at this row for maintaining the highlight later in reloadData
_selectedItem = [_items objectAtIndex:indexPath.row];
}
- (void) reloadData
{
[_itemsTable reloadData];
//Reselect and scroll to selection
int numItems = _items.count;
for (int i = 0; i < numItems; i++) {
NSDictionary *dict = [_numItems objectAtIndex:i];
if (dict == _selectedItem) {
//This is more reliable than calling the indexPathForSelectedRow on the UITableView,
// since the selection is cleared after calling reloadData
NSIndexPath *selectedIndexPath = [NSIndexPath indexPathForRow:i inSection:0];
[_itemsTable scrollToRowAtIndexPath:selectedIndexPath atScrollPosition:UITableViewScrollPositionMiddle animated:NO];
[_itemsTable selectRowAtIndexPath:selectedIndexPath animated:FALSE scrollPosition:UITableViewScrollPositionNone];
break;
}
}
}
Save the selected row, reload your table view's data and select the row again.
NSIndexPath* selectedIndexPath = [tableView indexPathForSelectedRow];
[tableView reloadData];
[tableView selectRowAtIndexPath:selectedIndexPath animated:NO scrollPosition:UITableViewScrollPositionNone];
You should know that this is dangerous, because if new items were added to the table view before the selected row, the selection will not be the correct cell. You should calculate how many rows were inserted before the row and adjust the selectedIndexPath accordingly.
i have a TableView with a Custom Cell and a Section Header. The Header shows me the Country and the custom Cell shows me the City.
which look like this:
USA
New York
Los Angeles
Germany
Berlin
Frakfurt
every Cell got a Button. after a press it will navigate and push the city name to the detail view .
The Problem is, that i don't know how to determine the city name after i pressed the button.
I had a solution but it doesn't work anymore:
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
NSManagedObject *managedObject = [self.fetchedResultsController objectAtIndexPath:indexPath];
StandortCell *cell = (StandortCell *)[tableView dequeueReusableCellWithIdentifier:#"ortCell"];
[cell.detailButton setTag:indexPath.row];
cell.ortLabel.text = [managedObject valueForKey:#"stadtname"];
}
- (IBAction)detailButton:(id)sender {
UIView *contentView = [sender superview];
UITableViewCell *cell = (UITableViewCell *)[contentView superview];
NSIndexPath *cellIndexPath = [self.tableView indexPathForCell:cell];
NSInteger section = cellIndexPath.section;
UIButton * myButton = sender;
int row=myButton.tag;
NSIndexPath * indexPath = [NSIndexPath indexPathForRow:row inSection:section];
StrasseViewController *detail = [self.storyboard instantiateViewControllerWithIdentifier:#"strasse"];
self.selectedStandort = [self.fetchedResultsController objectAtIndexPath:indexPath];
detail.currentStandort = self.selectedStandort;
[self.navigationController pushViewController:detail animated:YES];
}
when i use my old code it will just show the correct street row in the first section. it didn't detect the other sections(Countries);
When i choose the first city in the thirt section. it will display me the first city in the first section.
I hope you can help me.
use this I hope it will solve your purpose.
Create a button pressed method in your view controller
(IBAction)detailButton:(UIButton *)sender {
CustomUITableViewCellName *cell = (CustomUITableViewCellName *)[[sender superview]superview];
NSIndexPath *cellIndexPath = [YOUR_TABLE_NAME indexPathForCell:cell];
}
For ios 7 add another superview.
Now in this way you will get your IndexPath and you an get the current row by using
indexPath.row or indexPath.section.
You can get the title using sender.title property.
You can use this indexPath in your array to the required details.
You need to send row and section information seperately so make tag as
Tag= row*1000+section.
now from tag get section and row value using row= tag/1000
section =tag%1000
use this value to make correct index path or find some better then 2 mins solution to get that.
Caution its a workaround correct will be to
Subclass UIButton
Add a indexpath property int it
make your class to make button object and insted of tag set indexpath property.
in CustomButton.h
#interface CustomButton :UIButton
#property (nonatomic,assign)NSIndexPath *path;
#end
in CustomButton.m
#implementation CustomButton
#synthesize path;
#end
Use this custom button on your table view cell and instead of tag set path property