Autolayout inside a view-based NSTableView - cocoa

Question

I have an NSTableView (view-based) that creates a row;
- (NSView *)tableView:(NSTableView *)tableView viewForTableColumn:(NSTableColumn *)tableColumn row:(NSInteger)row {
TaskTableCellView *tableCellView = [[TaskTableCellView alloc] init];
return tableCellView;
}
-(void) tableView:(NSTableView *)tableView didAddRowView:(NSTableRowView *)rowView forRow:(NSInteger)row {
NSView *view = [rowView viewAtColumn:0];
[view setTranslatesAutoresizingMaskIntoConstraints:NO];
NSDictionary *views = NSDictionaryOfVariableBindings(view);
[tableView addConstraints:[NSLayoutConstraint constraintsWithVisualFormat:#"H:|[view]|" options:0 metrics:nil views:views]];
[tableView addConstraints:[NSLayoutConstraint constraintsWithVisualFormat:#"V:|[view]|" options:0 metrics:nil views:views]];
}
- (CGFloat)tableView:(NSTableView *)tableView heightOfRow:(NSInteger)row {
return 20;
}
This row creates some subviews and assigns some constraints;
- (void)layout {
[super layout];
ViewWithBackground *viewWithBackground = [[ViewWithBackground alloc] init];
viewWithBackground.backgroundColor = [NSColor greenColor];
[self addSubview:viewWithBackground];
[viewWithBackground setTranslatesAutoresizingMaskIntoConstraints:NO];
NSDictionary *views = NSDictionaryOfVariableBindings(viewWithBackground);
[self addConstraints:[NSLayoutConstraint constraintsWithVisualFormat:#"H:|[viewWithBackground]|"
options:0
metrics:nil
views:views]];
[self addConstraints:[NSLayoutConstraint constraintsWithVisualFormat:#"V:|[viewWithBackground]|"
options:0
metrics:nil
views:views]];
[viewWithBackground setContentHuggingPriority:200 forOrientation:NSLayoutConstraintOrientationVertical];
[viewWithBackground setContentHuggingPriority:200 forOrientation:NSLayoutConstraintOrientationHorizontal];
}
- (void)drawRect:(NSRect)dirtyRect {
[[NSColor redColor] set];
NSRectFill(dirtyRect);
[super drawRect:dirtyRect];
}
The fun starts when I actually try to edit the constraints.. viewWithBackground is just an empty NSView that sets it's background. When the constraint is |[viewWithBackground]| for both horizontal and vertical, I get the expected result -- green rows. When I change it to the most basic |-[viewWithBackground]-|, I get a decidedly unexpected result -- red rows, and no sign of my green view!
Is there some additional step I'm supposed to take here? My goal is to have my viewWithBackground actually be a slightly smaller view, to fake the 'gaps' between rows and the spacing from the edges of the table view..

Answer 1

In case anyone ever stumbles on this.. it turns out that NSTableCellView is a bit wonky without a min size -- adding (>=10) on the Vertical constraint took care of the issue..