I have a UITableView with two sections, and I added a edit button. If I press the edit button, I can delete the item on the UITableView, but I wanna to check the if the section is 0, the delete button will not display, how can I handle it for that purpose? Thank you.
Implement the tableView:canEditRowAtIndexPath: method of the table view delegate in your view controller to check for the section. This and other edit methods control both edit and delete capabilities:
- (BOOL)tableView:(UITableView *)tableView canEditRowAtIndexPath:(NSIndexPath *)indexPath
{
if (indexPath.section == 0)
{
return NO;
}
return YES;
}
Related
I've been trying to delete particular rows in UITableView, using below delegate method
tableView commitEditingStyle:editingStyle forRowAtIndexPath:
My intension is to not to show the "Delete" button for particular cells only.
please any one can help me how to solve this.
Use following Datasource method of UITableView
- (BOOL)tableView:(UITableView *)tableView canEditRowAtIndexPath:(NSIndexPath *)indexPath
{
// Return NO if you do not want the apply specified item to be editable.
if("Your Condition") // such like indexPath.row == 1,... or whatever.
return YES;
else
return NO;
}
In short return YES on specific row/cell which you want to edit otherwise return NO;
In my app I need to delete multiple rows in a table, edit the table and get a check box beside the table. When checked then the table cells are deleted. It is like the iPhone message app. How can I do this, please help me.
If I understand your question correctly, you essentially want to mark UITableViewCells in some way (a checkmark); then, when the user taps a master "Delete" button, all marked UITableViewCells are deleted from the UITableView along with their corresponding data source objects.
To implement the checkmark portion, you might consider toggling between UITableViewCellAccessoryCheckmark and UITableViewCellAccessoryNone for the UITableViewCell's accessory property. Handle touches in the following UITableViewController delegate method:
- (void)tableView:(UITableView *)tableView
didSelectRowAtIndexPath:(NSIndexPath *)indexPath {
UITableViewCell *c = [tableView cellForRowAtIndexPath:indexPath];
if (c.accessoryType == UITableViewCellAccessoryCheckmark) {
[c setAccessoryType:UITableViewCellAccessoryNone];
}
//else do the opposite
}
You might also look at this post regarding custom UITableViewCells if you're wanting a more complex checkmark.
You can set up a master "Delete" button two ways:
The IB approach
The programmatic approach
In either case, eventually a method must be called when the master "Delete" button is pressed. That method just needs to loop through the UITableViewCells in the UITableView and determined which ones are marked. If marked, delete them. Assuming just one section:
NSMutableArray *cellIndicesToBeDeleted = [[NSMutableArray alloc] init];
for (int i = 0; i < [tableView numberOfRowsInSection:0]; i++) {
NSIndexPath *p = [NSIndexPath indexPathWithIndex:i];
if ([[tableView cellForRowAtIndexPath:p] accessoryType] ==
UITableViewCellAccessoryCheckmark) {
[cellIndicesToBeDeleted addObject:p];
/*
perform deletion on data source
object here with i as the index
for whatever array-like structure
you're using to house the data
objects behind your UITableViewCells
*/
}
}
[tableView deleteRowsAtIndexPaths:cellIndicesToBeDeleted
withRowAnimation:UITableViewRowAnimationLeft];
[cellIndicesToBeDeleted release];
Assuming by "edit" you mean "delete a single UITableViewCell" or "move a single UITableViewCell," you can implement the following methods in the UITableViewController:
- (void)viewDidLoad {
[super viewDidLoad];
// This line gives you the Edit button that automatically comes with a UITableView
// You'll need to make sure you are showing the UINavigationBar for this button to appear
// Of course, you could use other buttons/#selectors to handle this too
self.navigationItem.rightBarButtonItem = self.editButtonItem;
}
// Override to support conditional editing of the table view.
- (BOOL)tableView:(UITableView *)tableView canEditRowAtIndexPath:(NSIndexPath *)indexPath {
// Return NO if you do not want the specified item to be editable.
return YES;
}
- (BOOL)tableView:(UITableView *)tableView canMoveRowAtIndexPath:(NSIndexPath *)indexPath {
return YES;
}
- (void)tableView:(UITableView *)tableView commitEditingStyle:(UITableViewCellEditingStyle)editingStyle forRowAtIndexPath:(NSIndexPath *)indexPath {
if (editingStyle == UITableViewCellEditingStyleDelete) {
//perform similar delete action as above but for one cell
}
}
- (void)tableView:(UITableView *)tableView moveRowAtIndexPath:(NSIndexPath *)fromIndexPath toIndexPath:(NSIndexPath *)toIndexPath {
//handle movement of UITableViewCells here
//UITableView cells don't just swap places; one moves directly to an index, others shift by 1 position.
}
You can put 1 UIButton lets call it "EDIT" and wire up it to IBAction. In IBAction write so you will be able to do as per your requirement.
-(IBAction)editTableForDeletingRow
{
[yourUITableViewNmae setEditing:editing animated:YES];
}
This will add round red buttons on the left hand corner and you can click on that Delete button will appear click on that and row will be deleted.
You can implement delegate method of UITableView as following.
-(UITableViewCellEditingStyle)tableView: (UITableView *)tableView editingStyleForRowAtIndexPath: (NSIndexPath *)indexPath
{
//Do needed stuff here. Like removing values from stored NSMutableArray or UITableView datasource
}
Hope it helps.
you want to be looking for deleteRowsAtIndexPath, with all your code squeezed between [yourTable beginUpdates] & [yourTable endUpdates];
As is done in the iPhone Mail app, I would like have the "Delete" button which appears on swiping an editable table cell from right to left to animate when it is dismissed (by way of tapping elsewhere than the Delete button on the UITableViewCell). Instead, my Delete button immediately disappears when it is dismissed.
To invoke the Delete button on swiping a table cell in the first place, I have added (to the class which is the UITableViewDataSource and UITableViewDelegate for the UITableView in question):
// Override to support conditional editing of the table view.
- (BOOL)tableView:(UITableView *)tableView canEditRowAtIndexPath:(NSIndexPath *)indexPath {
return YES;
}
// Override to support editing the table view.
- (void)tableView:(UITableView *)tableView commitEditingStyle:(UITableViewCellEditingStyle)editingStyle forRowAtIndexPath:(NSIndexPath *)indexPath {
if (editingStyle == UITableViewCellEditingStyleDelete) {
//add code here for when you hit delete
}
}
Is there something I might add to this which will handle the animation of the Delete button when it is dismissed? Thank you!
I had the same problem, just now found out that there is some problem when we have empty cell.textLabel.text. Try add in
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath:
{
{...} // omitted code
cell.textLabel.text = #"whatever";
cell.textLabel.hidden = YES;
}
With this swipe button dismiss proper, but WHY?
PS: tested with custom cells and built i.n
You should not need to animate the dismissal manually, it works the same way as invoking it so not sure why it is behaving differently in your app.
Are you using custom cells by any chance? As a thought for you to try, change the shouldIndentWhileEditingRowAtIndexPath: method to return NO and see if it changes anything. The only thing I can think of is that your content indentation is interfering with the delete button area in a way that the animation can't be performed or is not behaving as it should.
- (BOOL)tableView:(UITableView *)tableView shouldIndentWhileEditingRowAtIndexPath:(NSIndexPath *)indexPath {
return NO;
}
I've just ran into this issue as well. I have a series of tableViews and I noticed that some of them have the proper dismissal fade and others don't.
It seems the difference is a UITableViewCellAccessory. If this is set to anything other than UITableViewCellAccessoryNone then you get the proper animation. I think this might be a bug. Can anyone else confirm this behavior?
**> //MARK:-Tableview delete to left in swift without any tag By using Button Action**
let point = sender.convert(CGPoint.zero, to: tableView)
guard let indexpath = tableView.indexPathForRow(at: point) else {return}
stringArr.remove(at: indexpath.row)
tableView.beginUpdates()
tableView.deleteRows(at: [IndexPath(row: indexpath.row, section: 0)], with: .left)
tableView.endUpdates()
I have a core data/ uitableview based app. Actually 80% of the code so far is equal to the Apple Sample app CoreDataRecipes. My problem is that when I enter the edit mode (by pushing the edit button), there are no "delete badges" on the left side of the rows. Bumper.
The differences in code with CoreDataRecipes:
I have custom UITabelview cell with
a nib file instead of code only.
My Tableview is an Outlet inside my class view. So my class
RecipeListTableViewController is an
UIViewController with Tableview delegates instead of a UITableViewController
What I tried:
The Tableview works fine. There are no linking or delegate issues
I checked if the table actually
enters the edit mode. It does. You
can see that because the "Add" button
is disabled.
I checked if the editingstyle is ok. It should be by default but to make sure I added:
(UITableViewCellEditingStyle)tableView:(UITableView*)tableVieweditingStyleForRowAtIndexPath(NSIndexPath*)indexPath {return UITableViewCellEditingStyleDelete;}
I checked if the delete icons where not behind my cellview. There are not. I now think that the cell behaviour of moving to the right is handled by iOS.
When I swipe the cell, the right delete button appears and works as it should
I tried to build the behaviour my self with a layoutSubviews. Nothing changed when entering the edit mode. But when I swipe, now I see my subview in one row:
Anyone any ideas? It must be something simple.
Make sure that
- (BOOL)tableView:(UITableView *)tableView canEditRowAtIndexPath:(NSIndexPath *)indexPath
{
return YES;
}
If this is not set to return YES then the badges will not be enabled. The default is set to return NO
I think you have not added the line
tableView.editing=YES on clicking the Edit button
Try by setting it!
Since yours is a UIViewController, the tableview doesnt get the setEditing call. Just add:
- (void)setEditing:(BOOL)editing animated:(BOOL)animated {
[super setEditing:editing animated:animated];
[self.tv setEditing:editing animated:YES];
}
Make sure you have setup the outlet/ delegate/ datasource
then these:
-(void)editButtonTapped
{
[self.tableView setEditing:YES animated:YES];
}
-(BOOL)tableView:(UITableView *)tableView canEditRowAtIndexPath:(NSIndexPath *)indexPath
{
return YES;
}
-(UITableViewCellEditingStyle)tableView:(UITableView *)tableView editingStyleForRowAtIndexPath:(NSIndexPath *)indexPath
{
return UITableViewCellEditingStyleDelete;
}
HI
In my appliacation I want deletion control button will not work for first row except for all other rows.
Please can anybody tell me how it would be possible.
Thanks
Implement editingStyleForRowAtIndexPath method in table delegate and return style value depending on cell's index:
- (UITableViewCellEditingStyle)tableView:(UITableView *)tableView
editingStyleForRowAtIndexPath:(NSIndexPath *)indexPath{
//Disable editing for 1st row in section
return (indexPath.row == 0) ? UITableViewCellEditingStyleNone : UITableViewCellEditingStyleDelete;
}