I am showing list of items on UITableViewCell in different sections. I have created UITextField in viewForFooterInSection delegate
- (UIView *)tableView:(UITableView *)tableView viewForFooterInSection:(NSInteger)section
Now my problem is i dont want to show viewForFooterInSection everytime. It should be nil/hidden until i click didSelectRowAtIndexPath for that particular section. And UITextField should show only for that section only.
I am confused how to reload footerView on click ?
You can reload the footer view simply by reloading the section.
[self.tableView reloadSections:[NSIndexSet indexSetWithIndex:sectionIndex] withRowAnimation:UITableViewRowAnimationNone];
After this call, - (UIView *)tableView:(UITableView *)tableView viewForFooterInSection:(NSInteger)section hits again, where you can keep a boolean variable and accordingly return nil or your footer view.
- (UIView *)tableView:(UITableView *)tableView viewForFooterInSection:(NSInteger)section
{
if(conditionSatisfied)
return myFooterView;
return nil;
}
HTH,
Akshay
The simplest answer is simply to call [tableView reloadData]. Although this doesn't supply any sort of animation, I can't think of any nominally easy way to support animation in this case. It may be possible by inserting a row at the bottom of the section that looks like the footer, but that comes with another whole host of issues that I wouldn't want to deal with.
Edit: Just found a possibly slightly better option:
[tableView reloadSections:withRowAnimation:]. I've no idea whether this will animate the footer or not, or whether it will even make the query to your data provider, but it's worth a shot.
Related
I have an application where the main root is a UIViewController with a similar behavior like the application of facebook or path, that is, swipe and show another view, on the left or right.
However, my problem is that sometimes the main UIViewController has UITableViewcells, which should be eliminated with swipe, yet this does not work correctly, sometimes it detects the gesture sometimes not.
- (BOOL)tableView:(UITableView *)tableView canEditRowAtIndexPath:(NSIndexPath *)indexPath{
return YES;
}
- (void)tableView:(UITableView *)tableView commitEditingStyle:(UITableViewCellEditingStyle)editingStyle forRowAtIndexPath:(NSIndexPath *)indexPath {
if (editingStyle == UITableViewCellEditingStyleDelete) {
[dataItems removeObjectAtIndex:indexPath.row];
[self.tableView reloadData];
}
}
I am adopting this library
enter link description here
to make the controller of the UIViewController's
Any idea how to solve this?
Thanks in advance.
The problem is the gesture you're using. If both the table cells and view are trying to intercept swipe events you are guaranteed to not get the behavior you're looking for. The way that I usually solve this problem is to make a button that changes the table into editing mode. That way you don't have a conflict.
[tableView setEditing:YES animated:YES];
The problem isn't program design or language capabilities, it's having the EXACT SAME gesture do two DIFFERENT things. This isn't physically possible to implement and always get what you want. iOS devices can't read minds, although I heard about a new API in iOS 7...
You could try using multi-finger gestures.
Hi
I've got simple question which I don't know how to answer.
In my app I've got UITableViewController with cells. When I select one item (cell) it's getting higlighted and in other thread I'm loading chunk of data to display to the user (after load is done new VC is pushed). When doing it with thread user still can interact with application like, going back to other NavController and I do want that to happen. What I don't want to happen is that when loading isn't complete user can select other cell in table and it get's highlted. How I can prevent that (only highlit, I'm checking if there was a previous request so I'm not putting another thread untli previous request is done).
So basicly my question is, how can you foribd user from interacting with table view controller?
Set the selectionStyle of the UITableViewCell's to UITableViewCellSelectionStyleNone.
You can use the following to check if row can be selected:
- (NSIndexPath *)tableView:(UITableView *)tableView willSelectRowAtIndexPath:(NSIndexPath *)indexPath {
if (rowSelected) {
return nil;
}
return indexPath;
}
So, you only select it if no row is selected. In your didSelectRowAtIndexPath method:
- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath {
rowSelected = YES;
// call method that is going to do something and mark rowSelected = NO;
}
You can deselect the row by using
[[tableView cellForRowAtIndexPath:indexPath] setSelected:NO animated:YES];
There is a risk that your users will be confused. A highlight is not enough. There should be very clear visual feedback that a network opperation is ongoing and that different rules apply.
either push the details view immediately after the user selected a row and show an activity indicator in there.
or give the whole table view a different look while loading data for the selected row: e.g. Show activity indicator in the selected row & hide the disclosure chevrons in all the other. While doing that, you can set the selection style to 'none'
I'm building an app where a user is able to provide different usernames that he/she has. The vision is, the user is able to add and remove UITableViewCell to enter a username.
Right now I have a grouped UITableView and on the right hand side of every UITableViewCell I have a UIButton that adds another cell to the table with a UITextField. After the first cell, every cell has a delete button. I'm trying to make the UIButton delete that row. I have the IBAction that removes the cell, the only problem is, it's not deleting the proper row.
What is the best way to do what I'm attempting to do? I don't know how to properly search for this on Google. I'm sure someone has done what I'm trying to do.
Thanks for any help in advance!
Similar to what Derek said above -- UITableViewController already provides functionality to delete rows.
To toggle editing a UITableView, do something like: [self.tableView setEditing:!self.tableView.editing animated:YES];
Override tableView:canEditRowAtIndexPath: with something like (since it sounds like you don't want your first row to be deletable):
- (BOOL)tableView:(UITableView *)tableView canEditRowAtIndexPath:(NSIndexPath *)indexPath {
if ([indexPath row] == 0) {
return NO;
}
return YES;
}
Also override tableView:commitEditingStyle:
- (void)tableView:(UITableView *)tableView commitEditingStyle:(UITableViewCellEditingStyle)editingStyle
forRowAtIndexPath:(NSIndexPath *)indexPath {
if (editingStyle == UITableViewCellEditingStyleDelete) {
[self.dataArray removeObjectAtIndex:[indexPath row] - 1];
// delete the row from the data source
[tableView deleteRowsAtIndexPaths:[NSArray arrayWithObject:indexPath] withRowAnimation:YES];
}
}
Hope this helps!
It sounds like you are trying to code what a table view already has. Look into the built in editing facilities of a table view and you will find thaaat you don't need to have these unbuttons as table views and delegates have editwing facilities built in.
Your comment about deleting the wrong thing makes me think you have an issue with matching row numbers to indexes of your source data.
I am using a Table View Cell to draw custom cell in table view. Now the problem is that when I try to delete the cell in editing style UITableViewCellEditingStyleDelete only the
the little red -ve sign bitton appear and when I click it nothing happen.
Please help me and tell me how to delete custom cell in table view
Thanks
Gyani its not at all possible that when you click on (-) sign nothing happens.
May be your tables user interaction is disabled. Try enabling tableView.userInteractionEnabled=YES
And still it does not work then post some code.
hAPPY cODING...
did you implement the appropriate delegate methods? Specifically
- (BOOL)tableView:(UITableView *)tableView canEditRowAtIndexPath:(NSIndexPath *)indexPath
Did you implement this delegate method by following form?
- (void)tableView:(UITableView *)tableView commitEditingStyle:(UITableViewCellEditingStyle)editingStyle forRowAtIndexPath:(NSIndexPath *)indexPath
{
if (editingStyle == UITableViewCellEditingStyleDelete)
{
// remove the cell from UITableView
[tableView deleteRowsAtIndexPaths:indexPath withRowAnimation:YES];
// remove the data from self array or something else.
...
}
}
Do you have a subview in the cell that stops the user interaction? maybe located in negative x, so it is over the delete button.
I have a RootViewController class which is inherited from UITableViewController.
When a cell is deselected by the user I want to enable/disable certain buttons on the toolbar.
How do I trap the deselect event?
-(void)tableView:(UITableView *)tableView deselectRowAtIndexPath:(NSIndexPath *)indexPath animated:(BOOL)animated
{
if(indexPath.row <= rowNumber)
{
[viewButtton setEnabled:NO];
[editButtton setEnabled:NO];
}
}
I tried using this method but it doesn't seem to execute at all. Any ideas how cam this be done?
I do not think there is a deselectRowAtIndexPath event, there is a method that you can call to deselect the indexPath, but looking at the SDK I do not see an event for this in the UITableViewDelegate: http://developer.apple.com/iPhone/library/documentation/UIKit/Reference/UITableViewDelegate_Protocol/Reference/Reference.html.
Could you enable/disable certain buttons on the toolbar during the didSelectRowAtIndexPath: event?
-Rog
This is in the current beta SDK only which means it could be buggy / changed / unsupported...
I did noticed that your method declaration doesn't match the SDK (at least, the version I have).
Try removing animated:(BOOL)animated; I don't think it's applicable here.
See line ~345 in UITableView.h, and/or right click on didDeselectRowAtIndexPath and "Jump to Definition", where you'll probably find how the delegate method should be defined.
That said, if your goal is simply to "enable/disable certain buttons when a cell is selected",
- (NSIndexPath *)tableView:(UITableView *)tableView willSelectRowAtIndexPath:(NSIndexPath *)indexPath;
should work just fine. This will occur after they select the cell and before it's deselected. 'deselect' has to do more with animation than user interaction. The only reason I can think you would want to use deselect is maybe the aesthetic value of ensuring your event only occurs after the select cell is no no longer highlighted.