I want to edit the user's username inside a UITableView. I added a UITextField to the UITableViewCell and this seems to work very nicely. But when the user touches the cell (even outside the textfield), he expects to edit.
How do I programatically select the textfield?
The code would look something like:
- (void)tableView:(UITableView *)tableView
didSelectRowAtIndexPath:(NSIndexPath *)indexPath {
userName.selected = TRUE;
}
- (void)tableView:(UITableView *)tableView
didSelectRowAtIndexPath:(NSIndexPath *)indexPath
{
UITableViewCell *cellSelected = [tableView cellForRowAtIndexPath: indexPath];
UITextField *textField = [[cellSelected.contentView subviews] objectAtIndex: 0];
[textField becomeFirstResponder];
[tableView deselectRowAtIndexPath: indexPath animated: NO];
}
This assumes that you have no quicker way to know which UITextField object is in which cell, and that you know for sure that the UITextField will be the first subview.
You also might want to put in a check for [textField isFirstResponder] -- no point in making it the firstResponder if it already is. This may not be necessary though.
Related
I have created a custom cell that places a UITextField in each row of a UITableView. What I would like to do is enable the UITextField for a particular row (i.e. activate the cursor in that textfield), when the user presses on anywhere inside the cell.
I have the following method where I try to do this:
- (void) tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath {
[_cell.textField setUserInteractionEnabled:TRUE];
}
However, this is not working. Can anyone see what I'm doing wrong?
You're on the right track placing this inside didSelectRowAtIndexPath:. However, setting user interaction enabled on the textfield just means that the user would be allowed to interact with the object if they tried. You're looking for becomeFirstResponder.
- (void) tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath {
UITableViewCell *cell = [self.tableView cellForRowAtIndexPath:indexPath];
[cell.textField becomeFirstResponder];
}
Try this code:
- (void) tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath {
[_cell.textField becomeFirstResponder];
}
What is this _cell iVar? Are you setting it somewhere?
I think what you are trying to accomplish is this:
- (void) tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath {
UITableViewCell *cell = [tableView cellForRowAtIndexPath:indexPath];
[cell.textField becomeFirstResponder];
}
Notice that in this way you are getting the cell for the tapped indexPath.
And also, just for information, it's a pattern in objective-C to use booleans as YES or NO, instead of true or false.
This question already has answers here:
How to know the UITableview row number
(10 answers)
Closed 9 years ago.
I have a UITableView for which I have created a custom UITableViewCell. Each row in tableview has a button. I want to know the section number on click of a button, so that I would know that from which section button has been clicked. I have already tried few things found on stack but nothing is working.
UIButton *b = sender;
NSIndexPath *path = [NSIndexPath indexPathForRow:b.tag inSection:0];
NSLog(#"Row %d - Section : %d", path.row, path.section);
Don't know what you've tried, but i might do something like this. Doing some pseudocode from memory, here.
- (void)buttonClicked:(id)sender {
CGPoint buttonOrigin = [sender frame].origin;
// this converts the coordinate system of the origin from the button's superview to the table view's coordinate system.
CGPoint originInTableView = [self.tableView convertPoint:buttonOrigin fromView:[sender superview];
// gets the row corresponding to the converted point
NSIndexPath rowIndexPath = [self.tableView indexPathForRowAtPoint:originInTableView];
NSInteger section = [rowIndexPath section];
}
If I'm thinking clearly, this gives you flexibility in case the button's not directly inside the UITableView cell. Say, if you've nested inside some intermediary view.
Sadly, there doesn't seem to be an iOS equivalent of NSTableView's rowForView:
Create a handler for button click and add it in tableView:cellForRowAtIndexPath: method
- (void)buttonPressed:(UIButton *)button{
UITableViewCell *cell = button.superView.superView;
NSIndexPath *indexPath = [self.tableView indexPathForCell:cell];
//Now you have indexPath of the cell
//do your stuff here
}
When you create your custom UITableViewCell in cellForRowAtIndexPath you should pass it its section as a parameter. It could look like:
-(UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
MyCustomCell *cell = [tableView dequeueReusableCellWithIdentifier:#"MyIdentifier"];
if (!cell)
{
cell = [[[MyCustomCell alloc] initWithStyle:UITableViewCellStyleSubtitle reuseIdentifier:#"MyIdentifier" section:indexPath.section] autorelease];
}
return cell;
}
Now your cell knows its section and you can use it when performing click method in MyCustomCell class
Try this,
First assign section as a tag to button also add target on button in cellForRowAtIndexPath method.
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
...
[cell.btnSample setTag:indexPath.section];
[cell.btnSample addTarget:self action:#selector(buttonClicked:) forControlEvents:UIControlEventTouchUpInside];
...
}
Get Section as tag from sender of IBAction you defined (buttonClicked here).
-(IBAction)buttonClicked:(id)sender
{
NSLog(#"Section: %d",[sender tag]);
}
This question is bit related to my earlier question
I am newbie for iPhone application and trying to learn UITableView with JSON. I followed this video for learning.
I created same example using Stoaryboard and also added new screen where I can add data. Now I was trying to delete the data. So what I did is thought is instead of below method, I will add button on each row and on clicking of that I will delete the data.
- (void)tableView:(UITableView *)tableView commitEditingStyle:(UITableViewCellEditingStyle)editingStyle forRowAtIndexPath:(NSIndexPath *)indexPath
But I am not getting how I will get the row details and how to delete.
Any help/ suggestion would be grateful.
Below is how my screen looks like.
Note:
The UITableViewCell is of CUSTOM type.
Update the data model according to edit actions delete using bellow code.
This bellow code is just an example for hot to delete or remove the object from array and also from table .. for more info check the tutorial which i post the link bellow..
- (void)tableView:(UITableView *)aTableView commitEditingStyle:(UITableViewCellEditingStyle)editingStyle forRowAtIndexPath:(NSIndexPath *)indexPath {
if (editingStyle == UITableViewCellEditingStyleDelete) {
[arryData removeObjectAtIndex:indexPath.row];
[tblSimpleTable reloadData];
}
}
or also using this bellow logic with custom button of cell...
- (IBAction)deleteCustomCellWithUIButton:(id)sender
{
NSIndexPath *indexPath = [yourTableView indexPathForCell:(UITableViewCell *)[[[sender superview] superview] superview]];
NSUInteger row = [indexPath row];
[yourTableView removeObjectAtIndex:row];
[yourTableView deleteRowsAtIndexPaths:[NSArray arrayWithObject:indexPath] withRowAnimation:UITableViewRowAnimationFade];
}
For more info refer these tutorial...
iphone-sdk-tutorial-add-delete-reorder-UITableView-row
multiple-row-selection-and-editing-in
You can add a button on each row and set the button.tag to the indexPath.row in the cellForRowAtIndex: method. Then in your button method you can delete the entry from the Array that is used to populate the UITableView and then reloadData
You have many way to get cell or indexPath of cell:
(UITableViewCell *)cellForRowAtIndexPath:(NSIndexPath *)indexPath
(NSIndexPath *)indexPathForCell:(UITableViewCell *)cell
(NSIndexPath *)indexPathForRowAtPoint:(CGPoint)point
(NSArray *)indexPathsForRowsInRect:(CGRect)rect
(NSArray *)visibleCells
(NSArray *)indexPathsForVisibleRows
If you want to handel IBAction of UIButton than use indexPathForRowAtPoint like this :
-(IBAction)myAction:(id)sender
{
CGPoint location = [sender convertPoint:CGPointZero toView:self.tableView];
NSIndexPath *indexPath = [self.tableView indexPathForRowAtPoint:location];
UITableViewCell *swipeCell = [self.tableView cellForRowAtIndexPath:indexPath];
NSLog(#"Selected row: %d", indexPath.row);
//......
}
OR indexPathForCell
- (void)buttonPressedAction:(id)sender
{
UIButton *button = (UIButton *)sender;
// Get the UITableViewCell which is the superview of the UITableViewCellContentView which is the superview of the UIButton
(UITableViewCell*)cell = [[button superview] superview];
int row = [myTable indexPathForCell:cell].row;
}
I have taken code from :
Detecting which UIButton was pressed in a UITableView
Custom UITableViewCell button action?
The code below seems to have no effect. I want it to be highlighed in the same way it highlights when you tap on a row
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
...
[cell.textLabel setHighlighted:YES];
return cell;
}
This line will handle repainting the cell, label and accessory for you:
[tableView selectRowAtIndexPath:indexPath animated:NO scrollPosition:UITableViewScrollPositionNone];
As others have noted, you can programmatically select a cell using this method:
[tableView selectRowAtIndexPath:indexPath animated:NO scrollPosition:UITableViewScrollPositionNone];
However, you should be careful not to call this method too soon.
The first time that the view controller containing said tableView is initialized, the earliest that you should call this method is within viewDidAppear:.
So, you should do something like this:
- (void)viewDidAppear:(BOOL)animated
{
NSIndexPath *indexPath = [NSIndexPath indexPathForRow:0 inSection:0]; // set to whatever you want to be selected first
[tableView selectRowAtIndexPath:indexPath animated:NO scrollPosition:UITableViewScrollPositionNone];
}
If you try putting this call into viewDidLoad, viewWillAppear:, or any other early view lifecycle calls, it will likely not work or have odd results (such as scrolling to the correct position but not selecting the cell).
NSIndexPath *indexPath = [NSIndexPath indexPathForRow:1 inSection: 0];
[tableView selectRowAtIndexPath:indexPath animated:NO scrollPosition:UITableViewScrollPositionNone];
usually works
If you are using interface builder to build your interface, one thing to check is that you specified the view of the table view controller. If you don't actually specify the view, this selection message may go nowhere.
(you specify the view by selecting the table view controller in the interface builder inspector window and dragging the outlet for "view" to the table view you want to do the selection in).
- (BOOL)tableView:(UITableView *)tableView shouldHighlightRowAtIndexPath:(NSIndexPath *)indexPath {
return YES;
}
- (void)tableView:(UITableView *)tableView didHighlightRowAtIndexPath:(NSIndexPath *)indexPath {
// do something here
}
Try this :)
You can use
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
...
[cell.textLabel setHighlighted:YES];
return cell;
}
You have two choices. Either use the selection of the table view:
[tableView selectRowAtIndexPath: indexPath animated: YES scrollPosition: UITableViewScrollPositionNone];
Or change the background color of the table cell in the table view delegate:
- (void)tableView:(UITableView *)tableView willDisplayCell:(UITableViewCell *)cell forRowAtIndexPath:(NSIndexPath *)indexPath {
cell.backgroundColor = ...
}
The cell in this iPhone TableView definitely has a Detail-Disclosure-Button.
When I tap it... shouldn't this code give me access to the button?
Instead detailButton is always just null.
- (void) tableView:(UITableView *)tableView accessoryButtonTappedForRowWithIndexPath:(NSIndexPath *)indexPath
{
UITableViewCell *aCell = [tableView cellForRowAtIndexPath:indexPath];
UIButton *detailButton = (UIButton *)[aCell accessoryView];
}
are you over-riding the cell accessory button in 'cellForRowAtIndexPath' by any chance?
accessoryView is provided for your own customization, to override accessoryType. The table view cell will internally handle whatever you assign to accessoryType without affecting accessoryView.