I have an NSOutlineView with a custom datasource (I don't know if this is relevant).
I have only one column (again, I don't know if this is relevant) and I want to perform a specific action upon cell selection, so I thought I should override outlineViewSelectionDidChange. This what I did:
-(void)outlineViewSelectionDidChange:(NSNotification *)notification
{
NSLog(#"selection changed");
}
But this is not working. I have been playing around in IB with the Outline View, the Table Column and the Text Field Cell properties but so far I had no luck. I don't know if I changed any property that caused this situation or if this is something specific to my specific implementation.
So, anyone's got any clue on what I may be missing?
EDIT: Just in case I'm mis-interpreting the selection concept within an OutlineView, I expected the cells to be selected if I just click on the text outside the area of the expand arrow.
Well after a long struggle, as always, just after I posted my question, I found the answer. The problem is I am using the NSOutlineView in an NSPanel and somehow the NSPanel is not allowing the cells to be selected. If I just move the NSOutlineView to an NSWindow it works just as intended.
Related
Is it possible to use a UITableView to be able to enter a value into a database's field.
For example, if I was to have a UITableView pointing to a field within a database and if I wanted to enter a new entry into the database - tap on the UITableView Cell that would then allow keyboard input into the cell which ultimately end up being a new record in the database??
This is possible, but if something is possible doesn't mean you should be doing so.
You might ask why?
Well! you are trying to input data from view directly to database, this is a very bad practice. There are many reason for it being bad, the major is efficiency and security reasons.
You should consider using MVC pattern.
Now since its completely possible, I will explain the idea on how to do it and conclude with links that will have real code examples.
In tableView:cellForRowAtIndexPath:
add a TextField with tag (to get the reference back in future) and add it to contentView of the cell and have it hidden.
Now in tableView:didSelectRowAtIndexPath: make the cells editing property to YES.
Then, in tableView:willBeginEditingRowAtIndexPath:
get the reference to the textfield in contentview using viewWithTag: method and hide the textLabela and unhide the textfield.
In textfield's delegate textFieldDidEndEditing: make cell's editing property as no (yea, you need to keep the reference) unhide the textlabel and hide textfield.
In tableView:didEndEditingRowAtIndexPath: write methods which will commit the changes to your db.
Below are list of links which will get you code examples:
Having a UITextField in a UITableViewCell
Accessing UITextField in a custom UITableViewCell
iOS Database Tutorial
There are no examples for your requirement 'coz it bit bad way of doing things.
Yes its possible....
You can use delegate methods to take data form you cells textfield to your parent view controller and then save data in database.
I want to make a custom text selection in my table view.
I found this awesome answer on how to set the colors, fonts, etc. of the cells.
However, there is one issue.
It does not work for group rows. I see that the method gets invoked, but I think the style gets overwritten somewhere in either the NSTableCellView, or in the NSTableView class.
How can I fix this?
EDIT
It's a view based NSTableView
I´ve got a TableView with a Searchdisplay and when the user tabs on a cell, the cell accessoryType toggles between none and checkmark. That works fine, when i´m using only the tableview. But when I select a cell while i´m using the searchdisplay, the selection won't be applied to the "normal" tableview.
Maik
can you show me or tell me which type of data you are showing on table. and are you using a simple array? i have a method for solve this problem.
NOW i give you a tips when set chekmark you need to make changes in orignal array.How?When will you explain it. Then i can give you good method to do this.
I have 2 questions that I am having trouble answering.
I have a UITableView and when you touch a cell, it changes its height and inserts a sub view with some detail.
The problem is that when I select another cell, there is no obvious way to collapse the other cell. What I did as a temporary fix is run a loop whenever you select a cell, and on each cell, if its not the one you selected, it collapses it. This does not seem efficient, does anyone have an idea?
Second question is, whenever I collapse a cell, it animates. but it removes the detail subview kind of jarringly, is there a way to wait till the cell is done animating to remove it? I cannot find an appropriate delegate method.
Thanks in advance.
Perhaps the best way would be to have a variable that stores the index path (row) of the previously touched cell. Then, test to see if the current cell's index is not equal to the previous, collapse the previous cell and open the new one.
For your second issue, can you not animate the collapse before you remove the subview? I assume you're using [UIView beginAnimations] (or something similar). Set the duration of the animation [UIView setAnimationDuration:1.0], and then after you commit the animations, do [self performSelector:#selector(collapseCell) withObject:nil afterDelay:1.0].
I've not tested this, and I'm going off of memory, so sorry if it doesn't work as you'd hoped, but perhaps it can get you going in the right direction.
Edit: Apologies, I didn't see your "Core Animation" tag. The second solution may not be right for you.
I am using an NSFetchedResultsController with a data source that is updated in the background. This is working really well - as new objects are saved to the managed context they appear in the UITableView. However, this leads to the problem I'm having.
When you swipe to delete a cell, putting the cell into edit mode, if at that point an object is created which pushes the cell down in the table view, the position which the cell occupied will be in edit mode, and not the cell you selected. Basically, the UITableView retains the edit mode on the original index path, without adjusting for the movement of cells.
Is there any way to get around this? Thus far everything I've tried has lead to a dead end.
reminds me of a problem i had when reordering uitableview cells.Look at 'Responding to changes' in NSFetchedResultsController reference. It shows a way to temporarily disable the change notification. I used it for reordering, maybe you can get inspiration from it to solve your problem too.
kind regards
y