I have a simple project with UITableViewCell, inside the Cell I have a UITextField, In my case I am creating rows of a table dynamically, ie:
When I call function 'AddField' There is a counter that is responsible for storing the number of rows that the table must have.
-(void)AddField{
numberOfRows++;
[tableView reloadData];
}
- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section{
return numberOfRows;
}
So, if I type something in the first text field and then call the function to add more rows in the table, the row is added, another text field appear (leaving two), but the text entered in the first text field disappears due the command reloadData.
I Need help find the best way around this problem, any suggestions?
Have a Mutable array to store all the typed values.
[self.myMutableArray addObject:cell.textField.text];
In cell for Row at index path, get the text and set it back to the text field.
cell.textField.text = self.myMutableArray[indexPath.row]
Related
i have the indexPath number... i need to remove the cell accessory from that cell based on the number in the variable i have?
NSInteger *removeAccessoryFrom = 3;
[studentTableView cellForRowAtIndexPath:removeAccessoryFrom].accessoryType = UITableViewCellAccessoryNone;
It doesn't work like that. You need to reload the table data (either for the whole table or for just this row) and, inside cellForRowAtIndexPath, set the accessoryType to UITableViewCellAccessoryNone conditionally. In other words, you keep a list, or have some other way of knowing, at every moment, and for the entire table, exactly what cells get exactly what accessory. That way, any time cellForRowAtIndexPath is called, you can configure this cell for this index path correctly.
I'm trying to build this application where the Column 'Package Name' is populated from Core data. The second column has NSButtonCell added in IB and the idea is each time a checkbox is selected I need to get the name of the corresponding zip file in the 'Package Name' column.
I tried something like this
- (void)tableViewSelectionDidChange:(NSNotification *)notification {
NSTableView * tableView = [notification object];
NSInteger rowIndex = [tableView selectedRow];
NSTableColumn *column = [tableView tableColumnWithIdentifier:#"package-name"];
NSCell *cell = [column dataCellForRow:rowIndex];
NSLog(#"Found Value %#",cell.stringValue);
}
But the Value I get each time is different and inconsistent. For example if I select the 6ht checkbox (as shown in the screenshot), I expect to see 4.zip getting printed, but I get something else. How do I fix this ?
Both my Package Name and Installation Status columns are sortable.
Thanks
Don't consult the cells of the table. Instead, go straight to the data source or, if you're using bindings, the array controller.
First, in NSCell-based table views, there's typically a single cell object for the whole column. It is reused. It is configured for the first row and asked to draw in the appropriate location for that row. Then, it's configured for the second row and asked to draw in the appropriate location for the second row. Etc. So, retrieving the cell does not give you data for any particular row. The cell will have whatever properties it had the last time it was configured for a row, which may have been a completely different row than you're interested in.
(You could work around this by asking for the prepared cell for a row, using -[NSTableView preparedCellAtColumn:row:]. But that's really the roundabout way of doing things. The table view will just have to consult the data source in order to prepare the cell.)
If you're using an array controller, then your window/view controller should have an outlet to the array controller. Then, you can get the appropriate model object for a given row by calling:
object = [self.arrayController.arrangedObjects objectAtIndex:row];
If you're interested in the selected objects and your bindings are set up properly, you can just get the selected model object(s) directly from the array controller:
object = self.arrayController.selectedObjects[0];
Or:
for (object in self.arrayController.selectedObjects)
{
// ...
}
Note, though, that checking the checkbox in the second column is a distinct thing from selecting a row. Depending on how the table is configured, the user may be able to do either without the other. For example, they could select a row by clicking in the first column, which would not check the checkbox in the other column. They could also change the selection with the keyboard (e.g. down arrow).
I have a UITableView with gets populated from a backing array every time cellForRowAtIndexPath is called. The user can either go Back (via the nav bar) or they must submit the tableview's dataset to a server. Our GUI team wants the interface designed with a 'Done' button as the last cell in the table row in order to submit the dataset. Right now, numberOfRowsInSection is returning [myArray count] and I could conceivably alter the backing array with a "ghost" record for the done button, or simply return [myArray count] + 1 and catch the mis-matched array count in cellForRowAtIndexPath. Both ways, however, seem like trouble down the road. What's the best way to implement this?
Either put the button in the footer for the tableview, or mess with the row count. I've used both methods, just depends how much that last cell needs to look like the rest of the rows (or not look like them, in the case of using the footer)
I created tableview that read from url (any cell has name of book) and when clicked any cell gone detailView.
in detail view exist UIScroll that read any image from url and I create it.
but my problem this place. I don't know what read images in UIScroll related any cell.
this is URL : ".../mamal/book.php?p=%d&b=%d"
(p and b display number page and number book)
I want when clicked first cell (book1) compiler gone next page and display images related book1
and etc.
You have to use UITableView protocols <UITableViewDataSource,UITableViewDelegate> in your .h file then use below delegate method which you give which cell is clicked
-(void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath
{
NSLog(#"Clicked cell-> %d", indexPath.row);
}
You can also identify the currently selected row using the property indexPathForSelectedRow.
i.e if you want to know the index path of currently selected row at any point of time without using the delegate methods (not saving it during selection) you can use
tableView.indexPathForSelectedRow
If you want to pass around the value between multiple view controller you can declare an instance variable in the view controller you want the value to be passed and store tableView.indexPathForSelectedRow in this variable during initialization. A quick search on so should help you with that.
I'm developing a static grouped table view with storyboard. Anyway, sometimes I'd like not to display some of the rows. As long as the rows I want to hide are in the middle, I can set the height of that specific cell to 0 and the trick works :)
Anyway, when I want to hide the last cell of a group (I'm using a grouped table view), my trick obviously does not work. That's because the previous cell won't get the round corners typical of the last cell. Is there another trick that can help me with this issue?
I solved my problem implementing the method
- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section
even if I'm using a static table view.
The proper way to remove a cell from a table view after it has been rendered is to use the UITableView method called deleteRowsAtIndexPaths:withRowAnimation: . Here is a code sample:
[tableView deleteRowsAtIndexPaths:#[myCellIndexPath] withRowAnimation:UITableViewRowAnimationAutomatic];