I have a scrollview which has several table views as sub views...
say that I have selected a cell in one of the sub views. Now when I select a cell from another view, the cell I selected previously should not be highlighted.
How do I do this? I know I can do this using the first responder, but I am not sure how to do it.
Would anyone be able to help me out in this?
Thanks
From the apple interface guidlines:
Always provide feedback when users select a list item. Users expect a table row to highlight briefly when they tap a selectable item in it. After tapping, users expect an immediate action to occur: Either a new view appears or the row displays a checkmark to indicate that the item has been selected or enabled.
In rare cases, a row might remain highlighted when secondary details or controls related to the row item are displayed in the same screen. However, this is not encouraged because it is difficult to display simultaneously a list of choices, a selected item, and related details or controls without creating an uncomfortably crowded layout.
I don't think apple will approve an app that leaves a row highlighted (I had an app reject for that very reason). You should perform an action and then immediately unhighlight it. In some rare cases you can leave it highlighted while showing a related view.
However, if you store the current cell you have selected, you can call -deselectRowAtIndexPath:animated: on the tableview to deselect a row.
Related
I have a UITableView that I have scroll to the bottom as soon as the user adds another element/table cell to it. For the screen this works fine, because the user can see the cell they just added at the bottom of the table. But when running my app using VoiceOver, the first UITableCell to get focused and read is the top cell that's visible on the screen.
I want to set it so that the cell that gets focused and then read as soon as this UITableView appears is the very last cell in the table. How do I do this? It seems like it would be very simple but I can't figure it out.
Here's what I tried so far (in cellForRowAtIndexPath):
if (cellJustAdded && indexPath.row == [array count]-1) {
cell.accessibilityElementIsFocused = YES; //obviously this does not work
}
but I don't think you can use accessibilityElementIsFocused like that.
When you want VoiceOver to select a certain element you can post an accessibility notification using UIAccessibilityPostNotification( ... );.
Depending on if it's a major (complete screen) change or a minor (layout only) change you should post either
UIAccessibilityScreenChangedNotification (complete change)
UIAccessibilityLayoutChangedNotification (small change)
In both cases the optional argument is the element that VoiceOver should move to.
So after having added the new cell to your table view you would call
UIAccessibilityPostNotification(UIAccessibilityLayoutChangedNotification,
yourNewCellThatShouldHaveFocus);
Background
I'm really struggling to work out how to handle editing mode of a UITableView and hide some rows in when editing commences.
I'm using a grouped table view style with multiple sections and multiple rows per section. The last row of each section is titled "Add new...".
The idea is to allow the end user to click the "Add new..." row within each section and then be taken to a new screen where they fill in some fields and then are returned to that tableview with their new row added within the relevant section. So the last row does not really relate to the datasource and is more of a UX thing.
I've managed to get the Add row appended to the end of each section.
The problem
I have a button that calls: tableView setEditing:animated: and this insets all the rows and adds a delete icon to the left of each row.
What I don't want to do is allow the user to delete the "Add new..." row. So my orignal thinking was to just remove the delete capability for those "Add new..." rows using the tableView:canEditRowAtIndexPath:.
This worked but looks really crap as all the rows are inset apart from the "Add new..." rows.
So my current thinking is when edit mode commences just remove the "Add" rows from the table view and then when editing mode finishes add them back again.
I tried to do this by traversing all the rows when the user clicked the edit button but it seems you can only get rows that are currently visible using cellForRowAtIndexPath:.
So I can remove the ones that are visible but as soon as the user scrolls down the tableview the add buttons are still there for the sections that were not visible (at the time editing was initialised).
Help!
Does anyone know how I can just hide the "Add" rows from each section when the user edits the table and then add them back after?
I'm looking for the same functionality that the contacts app uses when the user edits a contact.
Actually you did already close the answer, just use the method cellForRowAtIndexPath to pick up the cell you want to hide, and set its hidden property to YES. You make it!
Oh, I am sorry that I had not noticed you are using the group style, so my suggestion is that you can try to separate the add button to the others, like include it in a single section.
You can display a green (+) button on the "Add line" row so it lines up with the deletable rows.
Simply override -tableView:editingStyleForRowAtIndexPath: in your table view delegate and return UITableViewCellEditingStyleInsert for that row.
What about removing the Add line(s) from the actual data source and just calling [tableView reloadData] then when edit mode changes back, add them back into the data source and reloadData again.
return YES from canEditCellAtIndexPath for every cell in the section then in override
- (UITableViewCellEditingStyle)tableView:(UITableView *)tableView editingStyleForRowAtIndexPath:(NSIndexPath *)indexPath {} and return UITableViewCellEditingStyleNone for the "add line" row else return UITableViewCellEditingStyleDelete
I am making app where a list of countries to be shown. When the first time app runs the user selects the no. of countries. I stored that list in nsuser defaults. I want to checkmark those countries in the TableView when the app runs again for second time.
One more problem is when I scroll through the TableView and again come to the previous position, the checkmark does not show. Why this happens??
In -tableView:cellForRowAtIndexPath: you should set wether or not a checkmark should be shown based on your internal model (which in your case comes from NSUserDefaults). In the tableView:didSelectRowAtIndexPath:, do not simply make the checkmark visible in the cell, but store in in your internal model as well. This way when a cell is being shown again, it will show up correctly.
This happens because the table Cells are reused so when you Scroll up they are cleaned and reused by the below data and when you go up again all the thing is happened again.
Regarding Checking again on second time.
Just store the index of the row in NSUserDefault and put the condition in cellForRowAtIndexPath that when the index is matched keep it Checked.
Hope this helps..
hAPPY cODING...
I'm building an app (not necessarily a twitter client) and I'm trying to figure out how developers create the buttons above and below a table view where a user presses them to either reload newer data or reload older data into a table view. Does anyone know of any tutorials out there that does this or know of an easy way?
If you want fixed buttons, you can just make your table view not use the full screen and add the buttons in the space. If you want the buttons to scroll with the table view, you can add a header or footer view to the table and put your buttons inside that.
Check the Three20 project. I believe there's a tableview there that does that.
It's actually not that hard to add inline buttons to a tableview. First you check and see if there's actually more data to show. If so, you want to add 1 to the number of rows returned from the datasource. When asked to draw that last row you return a cell that contains "Press for more" caption as well as a hidden spinner instead of the standard cell that shows your normal data.
If the user presses that last button the table view handler turns on the spinner then fires off a network event. Once the network request completes the data is processed and added to the same tableview datasource that was used to draw the first table.
Now all you have to do is tell the tableview to reload itself and the new data will show up. If you want to limit the amount of data shown you can prune out N number of items from the head of the datasource before redrawing so the memory-use stays manageable.
I have a list of things in a table view.
When a user tap a row, I increase score. I wish provide a way to clear the score for that row.
My first try is put the table in edit mode, show the delete button to that row and proceed. However, all the other rows get blocked and can't tap again the score or tap in the disclosure button.
So, obviously this is not the way. But then I don't see what to do. Any suggestion?
You could add a button to clear the row’s score as a subview of your table cell. I suppose you’d have to put it on the left side, though, since the disclosure button is on the right.