Why the backgroundColor doesn't work with owner:self.table? It only works with owner:self, however, with the second option -awakeFromNib is called many times.
setStringValue works with both options.
- (id)tableView:(NSTableView *)tableView viewForTableColumn:(NSTableColumn *)tableColumn row:(NSInteger)row {
NSTableCellView *cell = [tableView makeViewWithIdentifier:#"MainCell" owner:self.table];
[cell.textField setStringValue:#"FunWithFlags"]
cell.layer.backgroundColor = [[NSColor greenColor] CGColor];
return cell;
}
The owner param expects the owner object of the NIB which should be loaded and instantiated to create a new view with the supplied identifier.
The table object self.table is not the owner of any nib hence it does not return any view.
Related
Am trying to customise a table view cell. I have created a separate nib file for the cell. Have added a Table view Cell in it with the customised layout ( 2 textfields and an image). All of them have an outlet.
In,
- (NSView *)tableView:(NSTableView *)tableView viewForTableColumn:(NSTableColumn *)tableColumn row:(NSInteger)row {
MyCell *myCell = [tableView makeViewWithIdentifier:#"cellId" owner:self];
myCell.text1.stringValue = #"Foo";
myCell.text2.stringValue = #"Bar";
return myCell;
}
I know this is wrong implementation, but how can I load a new nib for a cell in a tableView ?
Are you using
- (void)registerNib:(NSNib *)nib forIdentifier:(NSString *)identifier
to register your cell xibs?
As title.
How does the NSTableView set content Mode(view-based or cell-based) by code?
Thanks for helping
NSTableView defaults to being cell-based, which makes sense for backwards compatibility. Table views are view-based when the table view delegate implements -tableView:viewForTableColumn:row:. You can easily test by programmatically creating a table view as follows:
#implementation BAVAppDelegate
- (void)applicationDidFinishLaunching:(NSNotification *)aNotification
{
NSView *contentView = self.window.contentView;
NSTableView *tableView = [[NSTableView alloc] initWithFrame:(NSRect){{50, NSMaxY(contentView.frame) - 200}, {400, 200}}];
tableView.dataSource = self;
tableView.delegate = self;
[contentView addSubview:tableView];
NSTableColumn *column = [[NSTableColumn alloc] initWithIdentifier:#"column"];
column.width = 400;
[tableView addTableColumn:column];
}
- (NSInteger)numberOfRowsInTableView:(NSTableView *)tableView {
return 3;
}
- (id)tableView:(NSTableView *)tableView objectValueForTableColumn:(NSTableColumn *)tableColumn row:(NSInteger)row {
return [NSString stringWithFormat:#"%ld", row];
}
//- (NSView *)tableView:(NSTableView *)tableView viewForTableColumn:(NSTableColumn *)tableColumn row:(NSInteger)row {
// NSTextField *textField = [[NSTextField alloc] initWithFrame:(NSRect){.size = {100, 15}}];
// textField.stringValue = [NSString stringWithFormat:#"%ld", row];
// return textField;
//}
#end
If you run this code with that delegate method commented out, you get a cell-based table view:
And if you uncomment that delegate method, you get a view-based table view:
The documentation for -tableView:viewForTableColumn:row: states that
This method is required if you wish to use NSView objects instead of NSCell objects for the cells within a table view. Cells and views can not be mixed within the same table view.
which hints at it being the condition that determines whether a table view is cell- or view-based.
I created a tableview and added image & text table view cell designed it now i thought to add another label in the row and assigned some values to the label based on the rows but it is not working and one more problem i cant hide label when the label in cell while in view i can able to hide
- (NSView *)tableView:(NSTableView *)tableView viewForTableColumn:(NSTableColumn *)tableColumn row:(NSInteger)row {
NSImage *profile=[NSImage imageNamed:#"header_menubg.png"];
NSString *identifer=[tableColumn identifier];
if([identifer isEqualToString:#"Mainidentifier"])
{
cellView = [tableView makeViewWithIdentifier:tableColumn.identifier owner:self];
[cellView.textField setStringValue:[_homearray objectAtIndex:row]];
[cellView.imageView setImage:profile];
return cellView;
}
if(row==0)
{
_countLabel.stringValue=#"40";
[cellView.textField setHidden:YES];
}
return nil;
}
And even i tried to hide text field in some rows that too not working what may be the problem
I have a NSTableView with a single NSTableCellView column that let's say, has an icon, name and an optional date.
When you edit a row, I want to replace the whole view with a simple NSTextField, and I will do some parsing to that text and extract that optional date, if present.
My question is, how would you implement this editing mechanism?
I tried returning a different view in the tableView:viewForTableColumn:row, something like:
- (NSView *)tableView:(NSTableView *)tableView viewForTableColumn:(NSTableColumn *)tableColumn row:(NSInteger)row
{
BOOL isSelected = [tableView isRowSelected:row];
if (isSelected)
{
NSView *view = [tableView makeViewWithIdentifier:#"editor" owner:self];
....snip....
return view;
}
else
{
TaskView *view = [tableView makeViewWithIdentifier:#"view" owner:self];
....snip....
return view;
}
}
and then whenever the selected row changes, trying to request a refresh on that row.
- (void)tableViewSelectionDidChange:(NSNotification *)aNotification
{
NSTableView *table = [aNotification object];
NSUInteger rowIndex = [table selectedRow];
[table reloadDataForRowIndexes:[NSIndexSet indexSetWithIndex:rowIndex]
columnIndexes:[NSIndexSet indexSetWithIndex:0]];
}
It doesn't quite work, and the code feels a bit dirty.
It must be a better way of doing this, and I can't seem to find in the docs or online.
I am facing trouble in putting check boxes into a UITableView. I am posting a part of my code here.
- (NSCell *)tableView:(NSTableView *)tableView dataCellForTableColumn:(NSTableColumn *)tableColumn row:(NSInteger)row
{
NSButtonCell *cell=[[NSButtonCell alloc] init];
NSString *strDisplayPlaylistName;
strDisplayPlaylistName=[playListNameArray objectAtIndex:row];
[cell setTitle:strDisplayPlaylistName];
[cell setAllowsMixedState:YES];
[cell setButtonType:NSSwitchButton];
return cell;
}
- (void)tableView:(NSTableView *)aTableView setObjectValue:(id)anObject forTableColumn:(NSTableColumn *)aTableColumn row:(NSInteger)rowIndex {
NSCell *aCell = [aTableColumn dataCellForRow:rowIndex];
[aCell setNextState];
//NSCell *aCell=[aAddedCells objectAtIndex:rowIndex];
//[aCell setNextState];
}
I got the checkboxes inside the UITableView. But the problem is that I can't uncheck the buttons. Is there anything more to do. I am new to cocoa programming.
You're missing a couple of important pieces. You need to update your model (data stcuture) in response to the tableValue:setObjectValue:forTableColumn:row: message, so that you can correctly return the new value from tableView:objectValueForTableColumn:row: method.
Here are some table data source methods assuming you have a 'myRows' array filled with objects with a 'booleanAttribute' property.
- (NSInteger)numberOfRowsInTableView:(NSTableView *)tableView {
return [myRows count];
}
- (id)tableView:(NSTableView *)tableView objectValueForTableColumn:(NSTableColumn *)tableColumn row:(NSInteger)row {
BOOL value = [[myRows objectAtIndex:row] booleanAttribute];
return [NSNumber numberWithInteger:(value ? NSOnState : NSOffState)];
}
- (void)tableView:(NSTableView *)tableView setObjectValue:(id)value forTableColumn:(NSTableColumn *)column row:(NSInteger)row {
[[myRows objectAtIndex:row] setBooleanAttribute:[value booleanValue]];
}
You should also setup your table cell in interface builder. You can drag a button cell configured like a standard check box directly onto one of your table columns.
I'm not sure why you're creating the cell in code. You can just drag the cell onto the table column in Interface Builder.
Also, setObjectValue: is where you respond to the change in the cell's state. The user has already changed the cell's state to off; then you send setNextState and change it back. That's why the cell doesn't appear to uncheck: you keep re-checking it.
What you need to do is not touch the cell at all, but set the object value (which, for this column, will probably be a Boolean NSNumber containing either YES or NO) as the new value of the appropriate property in your model.
Also, of course, make sure the column is set as editable.
If you have your NSTableView content mode set to "Cell Based" it will be "View Based" when you move the checkbox over.